U.S. public vehicle records

Kenworth T800 problems and owner complaints

Explore the records behind recurring owner reports.

Key facts

33 owner complaints analyzed

133 distinct recall campaigns

245,000 mi median reported failure mileage

Scope: 1987 to 2025 model years. Data updated: 2026-10-01 (October 1, 2026). 10 complaints include usable failure mileage. View data status.

Owner-reported patterns

Most common problems

Electrical System is the most frequently named component, appearing in 7 of 33 complaints (21.2%). A complaint can name multiple components.

Recurring terms in complaint narratives
Topic	Matching reports	Share of complaints
Braking behavior	6	18.2%
Electrical and battery issues	4	12.1%
Steering behavior	3	9.1%
Transmission and shifting	1	3.0%

Topic matches use published keyword rules. They describe mentions, including negations or comparisons, and do not confirm a diagnosis. Read the matching rules.

Component breakdown

Number of unique complaints naming each component. Top eight shown.

Electrical System

Unknown Or Other

Tires

Engine And Engine Cooling:Engine:Diesel

Equipment:Appliance:Air Conditioner

Power Train:Driveline:Driveshaft

Service Brakes

Structure:Frame And Members

Component breakdown data
Category	Count
Electrical System	7
Unknown Or Other	6
Tires	3
Engine And Engine Cooling:Engine:Diesel	2
Equipment:Appliance:Air Conditioner	2
Power Train:Driveline:Driveshaft	2
Service Brakes	2
Structure:Frame And Members	2

Electrical System: 7; Unknown Or Other: 6; Tires: 3; Engine And Engine Cooling:Engine:Diesel: 2; Equipment:Appliance:Air Conditioner: 2; Power Train:Driveline:Driveshaft: 2; Service Brakes: 2; Structure:Frame And Members: 2

Reported problems by failure mileage

Complaint counts in mileage bands. These are not failure rates per vehicle or mile.

Under 25,000

25,000 to 49,999

50,000 to 74,999

75,000 to 99,999

100,000 to 149,999

150,000 and above

Under 25,000: 1; 25,000 to 49,999: 0; 50,000 to 74,999: 2; 75,000 to 99,999: 0; 100,000 to 149,999: 0; 150,000 and above: 7

150,000 and above miles has the most reports with usable mileage (7). 23 complaints have missing, zero or invalid mileage.

Complaints over time

Year the complaint was filed, not the vehicle model year or incident year. The snapshot year is partial.

2000

2001

2002

2004

2005

2007

2008

2009

2010

2011

2012

2014

2015

2016

2018

2019

2021

2025

2000: 2; 2001: 3; 2002: 3; 2004: 2; 2005: 2; 2007: 1; 2008: 1; 2009: 1; 2010: 6; 2011: 3; 2012: 1; 2014: 1; 2015: 2; 2016: 1; 2018: 1; 2019: 1; 2021: 1; 2025: 1

Pattern summary

Electrical System leads the component reports. Braking behavior appears in 6 complaint narratives. Electrical and battery issues appears in 4 complaint narratives. Steering behavior appears in 3 complaint narratives. Use these patterns to inspect individual reports and prepare questions for a mechanic.

Calculated from recorded counts. An AI narrative has not been published for this selection.

Complaint evidence

Examples provide context, not a representative sample or a verified diagnosis.

Owner report 10211203 · 2007-12-08 (December 8, 2007)

A NORMAL DAY AT THE FARM I START MY TRUCK TO LET IT WARM UP. I LEAVE THE TRUCK AND COME BACK SEVERAL MINUTES LATER RELEASING MY PARKING BRAKES AND THING SEEMS NORMAL. I PULL FORWARD TOWARD A CORAL AND HIT MY BRAKES AND THERE WAS NONE. AS WAS ABOUT TO HIT CORAL I FINALLY GOT PARKING BRAKES ON. COME TO FIND OUT MY BRAKE PEDAL WAS STUCK. AND MY NEIGHBORS KENWORH TRUCK BRAKE PEDAL ALSO HAD STUCK WE HAD TO CLEAN THE BUTTON IN THE FLOORBOARDS THAT THE PEDAL PUSHES THE AIR VALVES A VERY DANGEROUS PROBLEM LUCKY NO CRASHES. *TR

Owner-reported narrative. 756,000 miles reported. Look up ODI 10211203 at NHTSA ↗

Owner report 880371 · 2001-02-12 (February 12, 2001)

ABS LIGHT COMES ON INTERMITTENTLY, ABS CAPABILITY INTERMITTENTLY. *AK

Owner-reported narrative. Look up ODI 880371 at NHTSA ↗

Owner report 10062928 · 2004-03-11 (March 11, 2004)

WHILE DRIVING AT NIGHT THE HEADLIGHTS SHUT OFF WITHOUT WARNING. THIS FORCED THE DRIVER TO PULL OFF THE ROAD, BECAUSE LACK OF VISIBILITY. CONSUMER CONTACTED THE DEALERSHIP, AND MECHANIC DETERMINED HEADLIGHT WIRING MELTED.*AK

Owner-reported narrative. Look up ODI 10062928 at NHTSA ↗

Owner report 10398226 · 2011-04-29 (April 29, 2011)

TL*THE CONTACT OWNS A 2004 KENWORTH T800B TRUCK. THE CONTACT STATED THE GEAR WAS IN THE PARK POSITION WITH THE ENGINE IN OPERATION WHEN SHE EXITED THE VEHICLE. THE CONTACT NOTICED FLAMES EMITTING FROM THE INSTRUMENT PANEL UPON ENTERING THE VEHICLE. THE FIRE DEPARTMENT EXTINGUISHED THE FLAMES. THE VEHICLE WAS TOWED TO AN AUTHORIZED DEALER. THE CAUSE OF FAILURE WAS NOT DETERMINED. THERE WAS A NHTSA RECALL RELATED TO THE DEFECT, CAMPAIGN 04V580000(ELECTRICAL SYSTEM:WIRING). THE VIN WAS NOT INCLUDED IN THE RECALL. THE FAILURE MILEAGE WAS APPROXIMAT…

Owner-reported narrative. 240,000 miles reported. Look up ODI 10398226 at NHTSA ↗

Owner report 769841 · 2002-11-18 (November 18, 2002)

THE STEERING COUPLING SEPARATED DUE TO INADEQUATE TIGHTENING OF THE TETAINING NUT AND BOLT, A FAULTY SLIP JOINT AND PERHAPS FAULTY METAL CHARACTERISTICS OF THE COUPLING, BOTH MALE AND FEMALE PARTS. KENWORTH WILL NOT RESPOND TO OUR LETTERS. THERE IS A RECALL IN 1997 FOR THIS SAME YEAR, MAKE AND MODEL OF TRUCK FOR A REAR SUSPENSION BECAUSE OF MATERIALS USED IN THE SWAY BAR AND ARMS. THE STEERING ROD CAME LOOSE FROM THE FIREWALL. DT

Owner-reported narrative. Look up ODI 769841 at NHTSA ↗

Owner report 899007 · 2001-11-09 (November 9, 2001)

WHEEL BEARINGS KEEP FAILING, STEERING TIRES KEEP GETTING EATEN UP, WHICH CAUSES VEHICLE TO PULL TO RIGHT, WHEN THIS HAPPENS BRAKES WOULD CHATTER DUE TO A LACK OF WHEEL BEARINGS. DRUM DROPPED ON BRAKE PADS AND SHOES. BRAKE SHOES WOULD BREAK OFF.*AK *YD

Owner-reported narrative. Look up ODI 899007 at NHTSA ↗

Owner report 10118239 · 2005-04-21 (April 21, 2005)

SUDDEN FULL UNCONTROLLED ACCELERATION BROUGHT ON BY A REAR END COLLISION WHILE MY VEHICLE WAS STOPPED IN TRAFFIC. DUMP TRUCK WITH ALLISON AUTOMATIC TRANSMISSION. TRANSMISSION TOWER BUTTONS WERE UNRESPONSIVE AND TRUCK WAS ESTIMATED BY WITNESS TO JUMP TO ALMOST IMMEDIATE 60 PLUS. DID NOT STOP UNTIL KEY WAS REMOVED. VIRGINIA DOT INSPECTION APPROX. 2 HOURS LATER FOUND NO PROBLEM AND TRUCK RESPONDED NORMALLY(EXCEPT FOR ACCIDENT DAMAGE) AFTER IT WAS RESTARTED. THERE WAS A SUDDEN SURGE IN THE ENGINE FOR APPROX. 2-3 SECONDS AFTER I WAS REAR ENDED AN…

Owner-reported narrative. 70,000 miles reported. Look up ODI 10118239 at NHTSA ↗

Compare model years

Recalls by model year

All campaigns in the snapshot affecting each model year, including recalls announced years later.

From yearThrough year

Recall campaigns

Shared campaigns appear once in each affected model year.

2009

2010

2011

2012

2013

2014

2015

2016

2017

2018

2019

2020

2021

2022

2023

2024

2025

2009: 19; 2010: 11; 2011: 13; 2012: 10; 2013: 8; 2014: 12; 2015: 12; 2016: 12; 2017: 8; 2018: 11; 2019: 8; 2020: 9; 2021: 1; 2022: 1; 2023: 1; 2024: 4; 2025: 1

First model yearSecond model year

Year-by-year records

Kenworth T800 model-year comparison
Model year	Complaints	Recalls	Change in recalls
1987	0	2	Not available
1988	0	2	0
1989	0	3	+1
1990	0	3	0
1991	0	4	+1
1992	0	1	-3
1993	0	1	0
1994	2	3	+2
1995	2	5	+2
1996	1	8	+3
1997	1	9	+1
1998	1	8	-1
1999	4	12	+4
2000	1	10	-2
2001	1	10	0
2002	0	6	-4
2003	1	7	+1
2004	3	12	+5
2005	3	12	0
2006	4	13	+1
2007	1	20	+7
2008	1	25	+5
2009	2	19	-6
2010	1	11	-8
2011	1	13	+2
2012	1	10	-3
2013	0	8	-2
2014	0	12	+4
2015	0	12	0
2016	1	12	0
2017	0	8	-4
2018	1	11	+3
2019	0	8	-3
2020	0	9	+1
2021	0	1	-8
2022	0	1	0
2023	0	1	0
2024	0	4	+3
2025	0	1	-3

Explore the data

Vehicle analysis explorer

Inspect model-year patterns, reported mileage, monthly activity and the evidence behind each signal.

Data completeness

33 unique complaints in this selection. Analysis snapshot: 2026-10-01.

30.3%Usable mileage10 / 33 records

93.9%Valid incident date31 / 33 records

100.0%Valid filing date33 / 33 records

93.9%Ordered incident and filing dates31 / 33 records

Missing, zero and invalid mileage is excluded. Dates after the snapshot are excluded. Examples are limited selections, not a representative sample.

Problems by model year

Model-wide comparison of the eight most reported components across the model. Cells show counts and shares within each model year. Open a cell for source examples.

From model yearThrough model year

Component complaint heatmap
Component	2011	2012	2013	2014	2015	2016	2017	2018	2019	2020	2021	2022	2023	2024	2025
Electrical System	00.0% No examples available for this selection.	00.0% No examples available for this selection.	0Unavailable No examples available for this selection.	0Unavailable No examples available for this selection.	0Unavailable No examples available for this selection.	00.0% No examples available for this selection.	0Unavailable No examples available for this selection.	00.0% No examples available for this selection.	0Unavailable No examples available for this selection.	0Unavailable No examples available for this selection.	0Unavailable No examples available for this selection.	0Unavailable No examples available for this selection.	0Unavailable No examples available for this selection.	0Unavailable No examples available for this selection.	0Unavailable No examples available for this selection.
Unknown Or Other	00.0% No examples available for this selection.	00.0% No examples available for this selection.	0Unavailable No examples available for this selection.	0Unavailable No examples available for this selection.	0Unavailable No examples available for this selection.	00.0% No examples available for this selection.	0Unavailable No examples available for this selection.	1100.0% ODI 11290133 · 50,688 mi EHAUST ' BRACKETS ATTACHING THE EXHAUST PIPES TO CAB HAVE RUBBER BUSHINGS THAT DISINTEGRATE QUICKLY, WITHIN A COUPLE OF MONTHS LEAVING THE PIPES HANGING WITH POSSIBILITY OF FALLING INTO THE ROADWAYS AND CAUSING ACCIDENTS. PART NUMBER: M11-1917-004. ON NEW (2018) VEHICLES THEY HAVE BEEN CHANGED MORE THAN ONCE. SEVERAL VEHICLES IN FLEET WITH SAME ISSUE. Look up ODI 11290133 at NHTSA ↗	0Unavailable No examples available for this selection.	0Unavailable No examples available for this selection.	0Unavailable No examples available for this selection.	0Unavailable No examples available for this selection.	0Unavailable No examples available for this selection.	0Unavailable No examples available for this selection.	0Unavailable No examples available for this selection.
Tires	00.0% No examples available for this selection.	00.0% No examples available for this selection.	0Unavailable No examples available for this selection.	0Unavailable No examples available for this selection.	0Unavailable No examples available for this selection.	1100.0% ODI 11442106 385/65 R22.5 Look up ODI 11442106 at NHTSA ↗	0Unavailable No examples available for this selection.	00.0% No examples available for this selection.	0Unavailable No examples available for this selection.	0Unavailable No examples available for this selection.	0Unavailable No examples available for this selection.	0Unavailable No examples available for this selection.	0Unavailable No examples available for this selection.	0Unavailable No examples available for this selection.	0Unavailable No examples available for this selection.
Engine And Engine Cooling:Engine:Diesel	00.0% No examples available for this selection.	00.0% No examples available for this selection.	0Unavailable No examples available for this selection.	0Unavailable No examples available for this selection.	0Unavailable No examples available for this selection.	00.0% No examples available for this selection.	0Unavailable No examples available for this selection.	00.0% No examples available for this selection.	0Unavailable No examples available for this selection.	0Unavailable No examples available for this selection.	0Unavailable No examples available for this selection.	0Unavailable No examples available for this selection.	0Unavailable No examples available for this selection.	0Unavailable No examples available for this selection.	0Unavailable No examples available for this selection.
Equipment:Appliance:Air Conditioner	00.0% No examples available for this selection.	00.0% No examples available for this selection.	0Unavailable No examples available for this selection.	0Unavailable No examples available for this selection.	0Unavailable No examples available for this selection.	00.0% No examples available for this selection.	0Unavailable No examples available for this selection.	00.0% No examples available for this selection.	0Unavailable No examples available for this selection.	0Unavailable No examples available for this selection.	0Unavailable No examples available for this selection.	0Unavailable No examples available for this selection.	0Unavailable No examples available for this selection.	0Unavailable No examples available for this selection.	0Unavailable No examples available for this selection.
Power Train:Driveline:Driveshaft	00.0% No examples available for this selection.	00.0% No examples available for this selection.	0Unavailable No examples available for this selection.	0Unavailable No examples available for this selection.	0Unavailable No examples available for this selection.	00.0% No examples available for this selection.	0Unavailable No examples available for this selection.	00.0% No examples available for this selection.	0Unavailable No examples available for this selection.	0Unavailable No examples available for this selection.	0Unavailable No examples available for this selection.	0Unavailable No examples available for this selection.	0Unavailable No examples available for this selection.	0Unavailable No examples available for this selection.	0Unavailable No examples available for this selection.
Service Brakes	1100.0% ODI 10809627 BRAKE SHOE RETURN SPRING CLIP THAT WHEN IS UNSEATED OFF PROPER AREA, DROPS ONTO S-CAM SHAFT AND IN TURN CONTACTS WHEEL HUB ANBD CUTS INTO ALUMINUM WHEEL HUB. WAS CAUGHT BEFORE CUTTING ALL THE WAY THROUGHT WHEEL HUB ASSEMBLY. DRIVER WAS COMPAINING ABOUT SQUELING NOISE IN FRONT BRAKE ALL THE TIME. Look up ODI 10809627 at NHTSA ↗	00.0% No examples available for this selection.	0Unavailable No examples available for this selection.	0Unavailable No examples available for this selection.	0Unavailable No examples available for this selection.	00.0% No examples available for this selection.	0Unavailable No examples available for this selection.	00.0% No examples available for this selection.	0Unavailable No examples available for this selection.	0Unavailable No examples available for this selection.	0Unavailable No examples available for this selection.	0Unavailable No examples available for this selection.	0Unavailable No examples available for this selection.	0Unavailable No examples available for this selection.	0Unavailable No examples available for this selection.
Structure:Frame And Members	00.0% No examples available for this selection.	00.0% No examples available for this selection.	0Unavailable No examples available for this selection.	0Unavailable No examples available for this selection.	0Unavailable No examples available for this selection.	00.0% No examples available for this selection.	0Unavailable No examples available for this selection.	00.0% No examples available for this selection.	0Unavailable No examples available for this selection.	0Unavailable No examples available for this selection.	0Unavailable No examples available for this selection.	0Unavailable No examples available for this selection.	0Unavailable No examples available for this selection.	0Unavailable No examples available for this selection.	0Unavailable No examples available for this selection.

Darker cells indicate a larger share of submitted complaints. Components overlap. This measures complaint composition, not failure probability.

Failure mileage by component

Median and middle 50% of usable owner-reported mileages. Ranges require at least five records.

Component failure mileage distribution
Component	Mileage range (25th–75th percentile)	Median	Usable records	Examples
Electrical System	Too few reports for a range	250,000 mi	3 (sparse)	ODI 10398226 · 240,000 mi TLTHE CONTACT OWNS A 2004 KENWORTH T800B TRUCK. THE CONTACT STATED THE GEAR WAS IN THE PARK POSITION WITH THE ENGINE IN OPERATION WHEN SHE EXITED THE VEHICLE. THE CONTACT NOTICED FLAMES EMITTING FROM THE INSTRUMENT PANEL UPON ENTERING THE VEHICLE. THE FIRE DEPARTMENT EXTINGUISHED THE FLAMES. THE VEHICLE WAS TOWED TO AN AUTHORIZED DEALER. THE CAUSE OF FAILURE WAS NOT DETERMINED. THERE WAS A NHTSA RECALL RELATED TO THE DEFECT, CAMPAIGN 04V580000(ELECTRICAL SYSTEM:WIRING). THE VIN WAS NOT INCLUDED IN THE RECALL. THE FAILURE MILEAGE WAS APPROXIMAT… Look up ODI 10398226 at NHTSA ↗ ODI 10240190 · 250,000 mi TLTHE CONTACT OWNS A 2005 KENWORTH T800. THE CONTACT STATED THAT THE CLAMPS THAT HOLD THE BATTERY CABLES, WHICH LEAD FROM THE BATTERY TO THE STARTER, WERE NOT ADJUSTED PROPERLY. AS A RESULT, THE CABLES WERE CHAFFING. A FIRE IGNITED AND SPREAD THROUGHOUT THE ENGINE AND CAB OF THE VEHICLE. THE FIRE DEPARTMENT EXTINGUISHED THE FIRE. THE INSURANCE ADJUSTER AND VEHICLE RE-BUILDER DIAGNOSED THE SOURCE OF THE FIRE. A POLICE REPORT WAS FILED. THE MANUFACTURER WAS NOT NOTIFIED AND THE VEHICLE HAS NOT BEEN REPAIRED. THE FAILURE AND CURRENT MILEA… Look up ODI 10240190 at NHTSA ↗ ODI 10275222 · 383,901 mi A TRACTOR UPDATE PROGRAM WAS INITIATED BY KENWORTH EARLY IN 2009 THAT INVOLVED THE 2008 T-800 TRACTORS. THE UPDATE REQUIRED THE INSTALLATION OF A 150 A "MEGAFUSE" INTO THE MAIN POSITIVE CONDUCTOR SUPPLYING ALL TRACTOR ELECTRICAL POWER (NOT TO THE STARTER MOTOR SOLENOID). SINCE THE "MEGAFUSE" WAS INSTALLED INLINE, OPENING OF THE FUSE EFFECTIVELY DE-ENERGIZED ALL ELECTRICAL COMPONENTS IN THE TRACTOR INCLUDING THE ELECTRONIC CONTROL MODULE (ECM) RESULTING IN IMMEDIATE ENGINE SHUT DOWN. FURTHER, ALL SIGNAL, WARNING, VISIBILITY AND HEAD LIGHT… Look up ODI 10275222 at NHTSA ↗
Unknown Or Other	Too few reports for a range	50,688 mi	1 (sparse)	ODI 11290133 · 50,688 mi EHAUST ' BRACKETS ATTACHING THE EXHAUST PIPES TO CAB HAVE RUBBER BUSHINGS THAT DISINTEGRATE QUICKLY, WITHIN A COUPLE OF MONTHS LEAVING THE PIPES HANGING WITH POSSIBILITY OF FALLING INTO THE ROADWAYS AND CAUSING ACCIDENTS. PART NUMBER: M11-1917-004. ON NEW (2018) VEHICLES THEY HAVE BEEN CHANGED MORE THAN ONCE. SEVERAL VEHICLES IN FLEET WITH SAME ISSUE. Look up ODI 11290133 at NHTSA ↗
Engine And Engine Cooling:Engine:Diesel	Too few reports for a range	628,000 mi	1 (sparse)	ODI 10058755 · 628,000 mi RECENTLY ONE OF MY TRACTORS EQUIPPED WITH A CATEPILLAR ENGINE HAD A MAJOR ENGINE FAILURE WHICH CAUSED MY DRIVER TO MAKE AN EMERGENCY STOP ALONG A FREEWAY IN COLORADO. I WAS INFORMED THE CRANKSHAFT HAD BROKEN. BY MISTAKE A NOTICE SENT BY CATERPILLAR NAMED "CONFIDENTIAL" WAS LEFT ON A COUNTER WHICH I HAPPENED TO PICK UP AND READ. IT STATED TRUCKS WITH THIS PARTICULAR ENGINE STARTING WITH A CERTAIN SERIAL NO. AND ENDING WITH ANOTHER SERIAL NO. HAD THIS TYPE OF ENGINE FAILURE, BROKEN CRANKSHAFT, WOULD BE HANDLED ACCORDING TO THE MILEAGE ON THAT T… Look up ODI 10058755 at NHTSA ↗
Service Brakes	Too few reports for a range	421,244 mi	1 (sparse)	ODI 10663075 · 421,244 mi WE HAVE 10 KENWORTH TRUCKS AND THE LEFT FRONT MUDFLAP IS DESIGNED WITHOUT ANY PROTECTION TO STOP IT FROM RUBBING ON THE AIR TANKS WHICH ARE PLACED DIRECTLY BEHIND THE MUDFLAP. AFTER TIME THE MUDFLAPS WEAR ON THE AIR TANKS UNTIL THEY LEAK AND OR BLOWOUT CAUSING IMMEDIATE AIR LOSS WHICH LOCKS UP ALL BRAKES WITH PARKING BRAKE CAPABILITY. THIS ENDS UP IN LOSS OF CONTROL OFF VEHICLE. AS THESE TRUCKS GET OLDER MORE OF THEM WILL FAIL. THIS IS A COMMON DESIGN FOR KENWORTH T800 TRUCKS AND SOMEONE SHOULD LOOK INTO THIS BEFORE IT CAUSES A FATALITY. *TR Look up ODI 10663075 at NHTSA ↗

Complaint and recall timeline

Explore monthly filing activity alongside recall announcements. Up to ten years of monthly history is available.

ComponentPeriod

Solid line: filed complaints. Dashed amber lines: recall announcement dates for this vehicle selection; markers include all recall components. The latest month is partial. Temporal proximity does not establish causation.

Monthly counts, recall campaigns and complaint examples

Monthly complaint and recall timeline
Month	Complaints	Campaigns announced	Examples
2024-11	0	None	No examples available for this selection.
2024-12	0	24V908000	No examples available for this selection.
2025-01	0	None	No examples available for this selection.
2025-02	1	None	ODI 11645340 See attached document for complaint. Look up ODI 11645340 at NHTSA ↗
2025-03	0	None	No examples available for this selection.
2025-04	0	None	No examples available for this selection.
2025-05	0	None	No examples available for this selection.
2025-06	0	None	No examples available for this selection.
2025-07	0	None	No examples available for this selection.
2025-08	0	None	No examples available for this selection.
2025-09	0	None	No examples available for this selection.
2025-10	0	None	No examples available for this selection.
2025-11	0	None	No examples available for this selection.
2025-12	0	None	No examples available for this selection.
2026-01	0	None	No examples available for this selection.
2026-02	0	None	No examples available for this selection.
2026-03	0	None	No examples available for this selection.
2026-04	0	None	No examples available for this selection.
2026-05	0	None	No examples available for this selection.
2026-06	0	None	No examples available for this selection.
2026-07	0	None	No examples available for this selection.
2026-08	0	None	No examples available for this selection.
2026-09	0	None	No examples available for this selection.
2026-10 (partial)	0	None	No examples available for this selection.

Emerging complaint spikes

Complete months in the latest six months with at least 10 complaints, at least twice the preceding 12-month average, and at least three square-root deviations above that average.

This is a descriptive screening rule, not a statistical defect finding. Publicity and reporting changes can increase submissions.

No complete months meet the spike thresholds for this selection.

Equal-age model-year comparison

Model-wide cumulative reports during the first three or five calendar years, starting with the model year (age 0). Only fully elapsed windows are compared.

Observation windowFirst model yearSecond model year

2022: 0 complaints · 2023: 0 complaints

Equal observation windows
Model year	Through age 0	Through age 1	Through age 2
2022	0	0	0
2023	0	0	0

Date coverage across each selected cohort

Date basis for all complaints in selected model years
Year	Incident dates used	Filing date fallbacks	Excluded dates
2022	0	0	0
2023	0	0	0

Incident date is preferred when valid and no later than filing; otherwise filing date is used. Model year approximates age. Equal observation time does not adjust for sales, distance driven or reporting delays. One complaint linked to multiple model years can appear in each cohort.

Components reported together

Each cell counts unique complaints naming both components. Open a nonzero cell for examples.

Component co-occurrence matrix
Component	Electrical System	Unknown Or Other	Tires	Engine And Engine Cooling:Engine:Diesel	Equipment:Appliance:Air Conditioner	Power Train:Driveline:Driveshaft	Service Brakes	Structure:Frame And Members
Electrical System	—	0	0	1 ODI 560665 TOP AND BOTTOM FRAME RAILS SHOULD HAVE SAME THICKNESS, HOWEVER THIS DID NOT, THERE IS A SAG IN TOP OF FRAME RAIL, RIGHT SIDE OF VEHICLE HAS SWAY, INNER FRAME RAIL ON RIGHT SIDE IS THINNER BETWEEN TOP AND BOTTOM. *SLC Look up ODI 560665 at NHTSA ↗	0	0	0	1 ODI 560665 TOP AND BOTTOM FRAME RAILS SHOULD HAVE SAME THICKNESS, HOWEVER THIS DID NOT, THERE IS A SAG IN TOP OF FRAME RAIL, RIGHT SIDE OF VEHICLE HAS SWAY, INNER FRAME RAIL ON RIGHT SIDE IS THINNER BETWEEN TOP AND BOTTOM. *SLC Look up ODI 560665 at NHTSA ↗
Unknown Or Other	0	—	1 ODI 10331841 I WORK FOR [XXX]. THEY ARE MAKING ME DRIVE THE TRUCK UNSAFE WITHOUT HAVING ANY MAINTENANCE DONE TO THE TRUCK AND RUNNING OVER THE HOURS FROM 12-20 HOURS A DAY. IF THEY I DON'T TAKE THE LOADS THEY TELL ME TO TAKE OR I AM FIRED AND I CANNOT AFFORD NOT TO WORK. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6). *TR Look up ODI 10331841 at NHTSA ↗	0	1 ODI 10331841 I WORK FOR [XXX]. THEY ARE MAKING ME DRIVE THE TRUCK UNSAFE WITHOUT HAVING ANY MAINTENANCE DONE TO THE TRUCK AND RUNNING OVER THE HOURS FROM 12-20 HOURS A DAY. IF THEY I DON'T TAKE THE LOADS THEY TELL ME TO TAKE OR I AM FIRED AND I CANNOT AFFORD NOT TO WORK. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6). *TR Look up ODI 10331841 at NHTSA ↗	0	0	0
Tires	0	1 ODI 10331841 I WORK FOR [XXX]. THEY ARE MAKING ME DRIVE THE TRUCK UNSAFE WITHOUT HAVING ANY MAINTENANCE DONE TO THE TRUCK AND RUNNING OVER THE HOURS FROM 12-20 HOURS A DAY. IF THEY I DON'T TAKE THE LOADS THEY TELL ME TO TAKE OR I AM FIRED AND I CANNOT AFFORD NOT TO WORK. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6). *TR Look up ODI 10331841 at NHTSA ↗	—	0	1 ODI 10331841 I WORK FOR [XXX]. THEY ARE MAKING ME DRIVE THE TRUCK UNSAFE WITHOUT HAVING ANY MAINTENANCE DONE TO THE TRUCK AND RUNNING OVER THE HOURS FROM 12-20 HOURS A DAY. IF THEY I DON'T TAKE THE LOADS THEY TELL ME TO TAKE OR I AM FIRED AND I CANNOT AFFORD NOT TO WORK. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6). *TR Look up ODI 10331841 at NHTSA ↗	0	0	0
Engine And Engine Cooling:Engine:Diesel	1 ODI 560665 TOP AND BOTTOM FRAME RAILS SHOULD HAVE SAME THICKNESS, HOWEVER THIS DID NOT, THERE IS A SAG IN TOP OF FRAME RAIL, RIGHT SIDE OF VEHICLE HAS SWAY, INNER FRAME RAIL ON RIGHT SIDE IS THINNER BETWEEN TOP AND BOTTOM. *SLC Look up ODI 560665 at NHTSA ↗	0	0	—	0	0	0	1 ODI 560665 TOP AND BOTTOM FRAME RAILS SHOULD HAVE SAME THICKNESS, HOWEVER THIS DID NOT, THERE IS A SAG IN TOP OF FRAME RAIL, RIGHT SIDE OF VEHICLE HAS SWAY, INNER FRAME RAIL ON RIGHT SIDE IS THINNER BETWEEN TOP AND BOTTOM. *SLC Look up ODI 560665 at NHTSA ↗
Equipment:Appliance:Air Conditioner	0	1 ODI 10331841 I WORK FOR [XXX]. THEY ARE MAKING ME DRIVE THE TRUCK UNSAFE WITHOUT HAVING ANY MAINTENANCE DONE TO THE TRUCK AND RUNNING OVER THE HOURS FROM 12-20 HOURS A DAY. IF THEY I DON'T TAKE THE LOADS THEY TELL ME TO TAKE OR I AM FIRED AND I CANNOT AFFORD NOT TO WORK. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6). *TR Look up ODI 10331841 at NHTSA ↗	1 ODI 10331841 I WORK FOR [XXX]. THEY ARE MAKING ME DRIVE THE TRUCK UNSAFE WITHOUT HAVING ANY MAINTENANCE DONE TO THE TRUCK AND RUNNING OVER THE HOURS FROM 12-20 HOURS A DAY. IF THEY I DON'T TAKE THE LOADS THEY TELL ME TO TAKE OR I AM FIRED AND I CANNOT AFFORD NOT TO WORK. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6). *TR Look up ODI 10331841 at NHTSA ↗	0	—	1 ODI 10134551 2004 AND 2005 T800 KENWORTH TRUCKS DEVELOPED A PROBLEM WHEN BACKING UP THERE IS A TWISTING OF THE ENGINE AND FRAME.*NO ANSWER REQUIRED. MR THE TWISTING ALSO CAUSED THE COOLING FAN TO STRIKE THE FAN SHROUD CAUSING DETERIORATION OF THE FAN AND LATER, FAILURE ALONG WITH THE RADIATOR. REPEATED FAILURE OF THE A/C CONDENSERS. THERE WERE SEVERAL FAILURES OF THE DRIVE-SHAFT CAUSING THE BOLTS ON THE REAR YOKE TO SHEAR OFF. THE DRIVE SHAFT FELL OFF OF THE VEHICLE WHILE BEING DRIVEN ON THE HIGHWAY. *SC Look up ODI 10134551 at NHTSA ↗	0	1 ODI 10134551 2004 AND 2005 T800 KENWORTH TRUCKS DEVELOPED A PROBLEM WHEN BACKING UP THERE IS A TWISTING OF THE ENGINE AND FRAME.*NO ANSWER REQUIRED. MR THE TWISTING ALSO CAUSED THE COOLING FAN TO STRIKE THE FAN SHROUD CAUSING DETERIORATION OF THE FAN AND LATER, FAILURE ALONG WITH THE RADIATOR. REPEATED FAILURE OF THE A/C CONDENSERS. THERE WERE SEVERAL FAILURES OF THE DRIVE-SHAFT CAUSING THE BOLTS ON THE REAR YOKE TO SHEAR OFF. THE DRIVE SHAFT FELL OFF OF THE VEHICLE WHILE BEING DRIVEN ON THE HIGHWAY. *SC Look up ODI 10134551 at NHTSA ↗
Power Train:Driveline:Driveshaft	0	0	0	0	1 ODI 10134551 2004 AND 2005 T800 KENWORTH TRUCKS DEVELOPED A PROBLEM WHEN BACKING UP THERE IS A TWISTING OF THE ENGINE AND FRAME.*NO ANSWER REQUIRED. MR THE TWISTING ALSO CAUSED THE COOLING FAN TO STRIKE THE FAN SHROUD CAUSING DETERIORATION OF THE FAN AND LATER, FAILURE ALONG WITH THE RADIATOR. REPEATED FAILURE OF THE A/C CONDENSERS. THERE WERE SEVERAL FAILURES OF THE DRIVE-SHAFT CAUSING THE BOLTS ON THE REAR YOKE TO SHEAR OFF. THE DRIVE SHAFT FELL OFF OF THE VEHICLE WHILE BEING DRIVEN ON THE HIGHWAY. *SC Look up ODI 10134551 at NHTSA ↗	—	0	1 ODI 10134551 2004 AND 2005 T800 KENWORTH TRUCKS DEVELOPED A PROBLEM WHEN BACKING UP THERE IS A TWISTING OF THE ENGINE AND FRAME.*NO ANSWER REQUIRED. MR THE TWISTING ALSO CAUSED THE COOLING FAN TO STRIKE THE FAN SHROUD CAUSING DETERIORATION OF THE FAN AND LATER, FAILURE ALONG WITH THE RADIATOR. REPEATED FAILURE OF THE A/C CONDENSERS. THERE WERE SEVERAL FAILURES OF THE DRIVE-SHAFT CAUSING THE BOLTS ON THE REAR YOKE TO SHEAR OFF. THE DRIVE SHAFT FELL OFF OF THE VEHICLE WHILE BEING DRIVEN ON THE HIGHWAY. *SC Look up ODI 10134551 at NHTSA ↗
Service Brakes	0	0	0	0	0	0	—	0
Structure:Frame And Members	1 ODI 560665 TOP AND BOTTOM FRAME RAILS SHOULD HAVE SAME THICKNESS, HOWEVER THIS DID NOT, THERE IS A SAG IN TOP OF FRAME RAIL, RIGHT SIDE OF VEHICLE HAS SWAY, INNER FRAME RAIL ON RIGHT SIDE IS THINNER BETWEEN TOP AND BOTTOM. *SLC Look up ODI 560665 at NHTSA ↗	0	0	1 ODI 560665 TOP AND BOTTOM FRAME RAILS SHOULD HAVE SAME THICKNESS, HOWEVER THIS DID NOT, THERE IS A SAG IN TOP OF FRAME RAIL, RIGHT SIDE OF VEHICLE HAS SWAY, INNER FRAME RAIL ON RIGHT SIDE IS THINNER BETWEEN TOP AND BOTTOM. *SLC Look up ODI 560665 at NHTSA ↗	1 ODI 10134551 2004 AND 2005 T800 KENWORTH TRUCKS DEVELOPED A PROBLEM WHEN BACKING UP THERE IS A TWISTING OF THE ENGINE AND FRAME.*NO ANSWER REQUIRED. MR THE TWISTING ALSO CAUSED THE COOLING FAN TO STRIKE THE FAN SHROUD CAUSING DETERIORATION OF THE FAN AND LATER, FAILURE ALONG WITH THE RADIATOR. REPEATED FAILURE OF THE A/C CONDENSERS. THERE WERE SEVERAL FAILURES OF THE DRIVE-SHAFT CAUSING THE BOLTS ON THE REAR YOKE TO SHEAR OFF. THE DRIVE SHAFT FELL OFF OF THE VEHICLE WHILE BEING DRIVEN ON THE HIGHWAY. *SC Look up ODI 10134551 at NHTSA ↗	1 ODI 10134551 2004 AND 2005 T800 KENWORTH TRUCKS DEVELOPED A PROBLEM WHEN BACKING UP THERE IS A TWISTING OF THE ENGINE AND FRAME.*NO ANSWER REQUIRED. MR THE TWISTING ALSO CAUSED THE COOLING FAN TO STRIKE THE FAN SHROUD CAUSING DETERIORATION OF THE FAN AND LATER, FAILURE ALONG WITH THE RADIATOR. REPEATED FAILURE OF THE A/C CONDENSERS. THERE WERE SEVERAL FAILURES OF THE DRIVE-SHAFT CAUSING THE BOLTS ON THE REAR YOKE TO SHEAR OFF. THE DRIVE SHAFT FELL OFF OF THE VEHICLE WHILE BEING DRIVEN ON THE HIGHWAY. *SC Look up ODI 10134551 at NHTSA ↗	0	—

Co-reporting does not establish that one component caused another concern.

Recurring narrative patterns

Specific keyword mentions beyond broad component labels. Matching includes negations and comparisons and does not confirm a diagnosis.

Search patterns

3 patterns with matching reports.

Brake response concerns

2 mentions · 6.1% of complaints

Median mileage: 756,000 mi (1 usable records).

ODI 10211203 · 756,000 mi

Look up ODI 10211203 at NHTSA ↗

ODI 10426275

TL* THE CONTACT OWNS A 2006 KENWORTH T800. THE CONTACT STATED THAT THE BRAKES WOULD NOT FUNCTION PROPERLY UNLESS EXCESSIVE PRESSURE WAS APPLIED TO THE BRAKE PEDAL. THE VEHICLE WAS TAKEN TO AN INDEPENDENT REPAIR SHOP WHERE THE TECHNICIANS STATED THAT ALL OF THE BRAKES WERE PERFORMING BELOW SPECIFICATIONS. THE BRAKES WERE REPAIRED. THE FAILURE SINCE RECURRED REPEATEDLY ON AN INTERMITTENT BASIS. THE VEHICLE WAS TAKEN BACK TO THE REPAIR SHOP NUMEROUS TIMES TO BE REPAIRED, BUT THE FAILURE PERSISTED. THE MANUFACTURER WAS MADE AWARE OF THE FAILURE. TH…

Look up ODI 10426275 at NHTSA ↗

Matching rule

Fuel smell or leak mentions

1 mentions · 3.0% of complaints

Median mileage: Unavailable (0 usable records).

ODI 10466248

2008 KENWORTH T800B. CONSUMER STATES SEVERAL PROBLEMS WITH VEHICLE TO INCLUDE LIQUID NATURAL GAS LEAKS *TGW THE CONSUMER STATED HE WAS PROMISED A WARRANTY ON THE LNG SYSTEM BY THE MANUFACTURER OF THE LNG SYSTEM IN THE TRUCK. HE WAS INFORMED HE COULD ONLY GET THE TRUCK SERVICED BY KENWORTH. HE HAS EXPERIENCED NUMEROUS PROBLEMS WITH THE LNG SYSTEM INCLUDING LIQUID GAS LEAKS OVERNIGHT WHICH CAUSED FREEZING ON THE TANK. SEVERAL VACUUMS HAD BEEN PERFORMED ON THE TANK TO TRY AND GET THE TANK TO WORK, BECAUSE NO ONE WANTED TO REPLACE THE TANK. *JB

Look up ODI 10466248 at NHTSA ↗

Matching rule

\b(fuel leak\w*|gas leak\w*|gas(?:oline)? smell|smell\w* (?:of )?(?:fuel|gas))\b

Steering assistance concerns

1 mentions · 3.0% of complaints

Median mileage: 383,901 mi (1 usable records).

ODI 10275222 · 383,901 mi

A TRACTOR UPDATE PROGRAM WAS INITIATED BY KENWORTH EARLY IN 2009 THAT INVOLVED THE 2008 T-800 TRACTORS. THE UPDATE REQUIRED THE INSTALLATION OF A 150 A "MEGAFUSE" INTO THE MAIN POSITIVE CONDUCTOR SUPPLYING ALL TRACTOR ELECTRICAL POWER (NOT TO THE STARTER MOTOR SOLENOID). SINCE THE "MEGAFUSE" WAS INSTALLED INLINE, OPENING OF THE FUSE EFFECTIVELY DE-ENERGIZED ALL ELECTRICAL COMPONENTS IN THE TRACTOR INCLUDING THE ELECTRONIC CONTROL MODULE (ECM) RESULTING IN IMMEDIATE ENGINE SHUT DOWN. FURTHER, ALL SIGNAL, WARNING, VISIBILITY AND HEAD LIGHT…

Look up ODI 10275222 at NHTSA ↗

Matching rule

\b(power steer\w*|steering assist\w*|steering lock\w*|steering wheel lock\w*)\b