U.S. public vehicle records

Thor Motor Coach SIESTA problems and owner complaints

Explore the records behind recurring owner reports.

Key facts

4 owner complaints analyzed

8 distinct recall campaigns

22,615 mi median reported failure mileage

Scope: 2011 to 2020 model years. Data updated: 2026-10-01 (October 1, 2026). 2 complaints include usable failure mileage. View data status.

This selection has limited data. It remains available for lookup but is excluded from search indexing.

Owner-reported patterns

Most common problems

Air Bags is the most frequently named component, appearing in 1 of 4 complaints (25.0%). A complaint can name multiple components.

Recurring terms in complaint narratives
Topic	Matching reports	Share of complaints
Braking behavior	1	25.0%

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.

Air Bags

Electrical System

Electrical System:Wiring

Equipment

Equipment:Recreational Vehicle/Trailer

Equipment:Recreational Vehicle/Trailer:Lpg Systems

Air Bags: 1; Electrical System: 1; Electrical System:Wiring: 1; Equipment: 1; Equipment:Recreational Vehicle/Trailer: 1; Equipment:Recreational Vehicle/Trailer:Lpg Systems: 1

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: 1; 50,000 to 74,999: 0; 75,000 to 99,999: 0; 100,000 to 149,999: 0; 150,000 and above: 0

Under 25,000 miles has the most reports with usable mileage (1). 2 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.

2019

2020

2022

2023

2019: 1; 2020: 1; 2022: 1; 2023: 1

Pattern summary

Air Bags leads the component reports. Braking behavior appears in 1 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 11331066 · 2020-06-26 (June 26, 2020)

WHEEL SPEED SENSORS CHANGED 6 TIMES SO FAR. WHEN SENSOR ISSUE, ABS, TRACTION CONTROL, & ESP LIGHTS UP ON DASH, CRUISE CONTROL DISABLED, ABS DISABLED. IF TWO SENSORS GO OUT AT SAME TIME, VEHICLE GOES IN LIMP MODE. SEEMS TO BE NUMEROUS COMPLAINTS ON RV'S BUILT ON MERCEDES BENZ SPRINTER 3500 CHASSIS.

Owner-reported narrative. 45,150 miles reported. Look up ODI 11331066 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.

2011

2012

2013

2014

2015

2016

2017

2018

2019

2020

2011: 1; 2012: 2; 2013: 2; 2014: 1; 2015: 3; 2016: 2; 2017: 1; 2018: 1; 2019: 1; 2020: 4

First model yearSecond model year

Year-by-year records

Thor Motor Coach SIESTA model-year comparison
Model year	Complaints	Recalls	Change in recalls
2011	0	1	Not available
2012	0	2	+1
2013	1	2	0
2014	1	1	-1
2015	1	3	+2
2016	0	2	-1
2017	0	1	-1
2018	1	1	0
2019	0	1	0
2020	0	4	+3

Explore the data

Vehicle analysis explorer

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

Data completeness

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

50.0%Usable mileage2 / 4 records

100.0%Valid incident date4 / 4 records

100.0%Valid filing date4 / 4 records

100.0%Ordered incident and filing dates4 / 4 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
Air Bags	0Unavailable No examples available for this selection.	0Unavailable No examples available for this selection.	00.0% No examples available for this selection.	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.	1100.0% ODI 11464036 FRONT PASSENGER SIDE AIRBAG, CHRONIC WARNING LIGHTS, MULTIPLE REPAIR ATTEMPTS BY 1st and 2nd OWNER Look up ODI 11464036 at NHTSA ↗	0Unavailable No examples available for this selection.	0Unavailable No examples available for this selection.
Electrical System	0Unavailable No examples available for this selection.	0Unavailable No examples available for this selection.	00.0% No examples available for this selection.	1100.0% ODI 11331066 · 45,150 mi WHEEL SPEED SENSORS CHANGED 6 TIMES SO FAR. WHEN SENSOR ISSUE, ABS, TRACTION CONTROL, & ESP LIGHTS UP ON DASH, CRUISE CONTROL DISABLED, ABS DISABLED. IF TWO SENSORS GO OUT AT SAME TIME, VEHICLE GOES IN LIMP MODE. SEEMS TO BE NUMEROUS COMPLAINTS ON RV'S BUILT ON MERCEDES BENZ SPRINTER 3500 CHASSIS. Look up ODI 11331066 at NHTSA ↗	00.0% 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.	0Unavailable No examples available for this selection.
Electrical System:Wiring	0Unavailable No examples available for this selection.	0Unavailable No examples available for this selection.	00.0% No examples available for this selection.	00.0% No examples available for this selection.	1100.0% ODI 11278413 · 80 mi TL* THE CONTACT OWNS A 2015 THOR SIESTA EQUIPPED WITH A CUMMINS 3.6 KW GENERATOR. THE CONTACT ATTEMPTED TO START THE GENERATOR, BUT WAS UNSUCCESSFUL. IN ADDITION, THERE WAS AN ABNORMAL ODOR IN THE VEHICLE PRIOR TO THE FAILURE. THE GENERATOR WAS TAKEN TO CUMMINS SALES AND SERVICE (12 INTEGRA DR, CONCORD, NH 03301, [phone removed]) WHERE THE CONTACT WAS INFORMED THAT THE WIRES IN THE TRANSFER SWITCH WERE MELTED AND THAT IT WAS A THERMAL EVENT. THE GENERATOR WAS REPAIRED. THE MANUFACTURER WAS MADE AWARE OF THE FAILURE AND INFORMED THE CONTACT THAT… Look up ODI 11278413 at NHTSA ↗	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.	0Unavailable No examples available for this selection.
Equipment	0Unavailable No examples available for this selection.	0Unavailable No examples available for this selection.	00.0% No examples available for this selection.	00.0% No examples available for this selection.	1100.0% ODI 11278413 · 80 mi TL* THE CONTACT OWNS A 2015 THOR SIESTA EQUIPPED WITH A CUMMINS 3.6 KW GENERATOR. THE CONTACT ATTEMPTED TO START THE GENERATOR, BUT WAS UNSUCCESSFUL. IN ADDITION, THERE WAS AN ABNORMAL ODOR IN THE VEHICLE PRIOR TO THE FAILURE. THE GENERATOR WAS TAKEN TO CUMMINS SALES AND SERVICE (12 INTEGRA DR, CONCORD, NH 03301, [phone removed]) WHERE THE CONTACT WAS INFORMED THAT THE WIRES IN THE TRANSFER SWITCH WERE MELTED AND THAT IT WAS A THERMAL EVENT. THE GENERATOR WAS REPAIRED. THE MANUFACTURER WAS MADE AWARE OF THE FAILURE AND INFORMED THE CONTACT THAT… Look up ODI 11278413 at NHTSA ↗	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.	0Unavailable No examples available for this selection.
Equipment:Recreational Vehicle/Trailer	0Unavailable No examples available for this selection.	0Unavailable No examples available for this selection.	1100.0% ODI 11521206 After the gas powered fridge was turned on. Approximately an hour later the back side of the unit was in flames causing extensive damage and totaling the RV. The failure of the equipment caused the fire. This problem has been ongoing with similar models and is well documented. Has been investigated by a Fire Inspector. Look up ODI 11521206 at NHTSA ↗	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.	00.0% No examples available for this selection.	0Unavailable No examples available for this selection.	0Unavailable No examples available for this selection.
Equipment:Recreational Vehicle/Trailer:Lpg Systems	0Unavailable No examples available for this selection.	0Unavailable No examples available for this selection.	1100.0% ODI 11521206 After the gas powered fridge was turned on. Approximately an hour later the back side of the unit was in flames causing extensive damage and totaling the RV. The failure of the equipment caused the fire. This problem has been ongoing with similar models and is well documented. Has been investigated by a Fire Inspector. Look up ODI 11521206 at NHTSA ↗	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.	00.0% 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	45,150 mi	1 (sparse)	ODI 11331066 · 45,150 mi WHEEL SPEED SENSORS CHANGED 6 TIMES SO FAR. WHEN SENSOR ISSUE, ABS, TRACTION CONTROL, & ESP LIGHTS UP ON DASH, CRUISE CONTROL DISABLED, ABS DISABLED. IF TWO SENSORS GO OUT AT SAME TIME, VEHICLE GOES IN LIMP MODE. SEEMS TO BE NUMEROUS COMPLAINTS ON RV'S BUILT ON MERCEDES BENZ SPRINTER 3500 CHASSIS. Look up ODI 11331066 at NHTSA ↗
Electrical System:Wiring	Too few reports for a range	80 mi	1 (sparse)	ODI 11278413 · 80 mi TL* THE CONTACT OWNS A 2015 THOR SIESTA EQUIPPED WITH A CUMMINS 3.6 KW GENERATOR. THE CONTACT ATTEMPTED TO START THE GENERATOR, BUT WAS UNSUCCESSFUL. IN ADDITION, THERE WAS AN ABNORMAL ODOR IN THE VEHICLE PRIOR TO THE FAILURE. THE GENERATOR WAS TAKEN TO CUMMINS SALES AND SERVICE (12 INTEGRA DR, CONCORD, NH 03301, [phone removed]) WHERE THE CONTACT WAS INFORMED THAT THE WIRES IN THE TRANSFER SWITCH WERE MELTED AND THAT IT WAS A THERMAL EVENT. THE GENERATOR WAS REPAIRED. THE MANUFACTURER WAS MADE AWARE OF THE FAILURE AND INFORMED THE CONTACT THAT… Look up ODI 11278413 at NHTSA ↗
Equipment	Too few reports for a range	80 mi	1 (sparse)	ODI 11278413 · 80 mi TL* THE CONTACT OWNS A 2015 THOR SIESTA EQUIPPED WITH A CUMMINS 3.6 KW GENERATOR. THE CONTACT ATTEMPTED TO START THE GENERATOR, BUT WAS UNSUCCESSFUL. IN ADDITION, THERE WAS AN ABNORMAL ODOR IN THE VEHICLE PRIOR TO THE FAILURE. THE GENERATOR WAS TAKEN TO CUMMINS SALES AND SERVICE (12 INTEGRA DR, CONCORD, NH 03301, [phone removed]) WHERE THE CONTACT WAS INFORMED THAT THE WIRES IN THE TRANSFER SWITCH WERE MELTED AND THAT IT WAS A THERMAL EVENT. THE GENERATOR WAS REPAIRED. THE MANUFACTURER WAS MADE AWARE OF THE FAILURE AND INFORMED THE CONTACT THAT… Look up ODI 11278413 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	Campaigns announced	Examples
2024-11	None	No examples available for this selection.
2024-12	None	No examples available for this selection.
2025-01	None	No examples available for this selection.
2025-02	None	No examples available for this selection.
2025-03	None	No examples available for this selection.
2025-04	None	No examples available for this selection.
2025-05	None	No examples available for this selection.
2025-06	None	No examples available for this selection.
2025-07	None	No examples available for this selection.
2025-08	None	No examples available for this selection.
2025-09	None	No examples available for this selection.
2025-10	None	No examples available for this selection.
2025-11	None	No examples available for this selection.
2025-12	None	No examples available for this selection.
2026-01	None	No examples available for this selection.
2026-02	None	No examples available for this selection.
2026-03	None	No examples available for this selection.
2026-04	None	No examples available for this selection.
2026-05	None	No examples available for this selection.
2026-06	None	No examples available for this selection.
2026-07	None	No examples available for this selection.
2026-08	None	No examples available for this selection.
2026-09	None	No examples available for this selection.
2026-10 (partial)	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

2019: 0 complaints · 2020: 0 complaints

Equal observation windows
Model year	Through age 0	Through age 1	Through age 2
2019	0	0	0
2020	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
2019	0	0	0
2020	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	Air Bags	Electrical System	Electrical System:Wiring	Equipment	Equipment:Recreational Vehicle/Trailer	Equipment:Recreational Vehicle/Trailer:Lpg Systems
Air Bags	—	0	0	0	0	0
Electrical System	0	—	0	0	0	0
Electrical System:Wiring	0	0	—	1 ODI 11278413 · 80 mi TL* THE CONTACT OWNS A 2015 THOR SIESTA EQUIPPED WITH A CUMMINS 3.6 KW GENERATOR. THE CONTACT ATTEMPTED TO START THE GENERATOR, BUT WAS UNSUCCESSFUL. IN ADDITION, THERE WAS AN ABNORMAL ODOR IN THE VEHICLE PRIOR TO THE FAILURE. THE GENERATOR WAS TAKEN TO CUMMINS SALES AND SERVICE (12 INTEGRA DR, CONCORD, NH 03301, [phone removed]) WHERE THE CONTACT WAS INFORMED THAT THE WIRES IN THE TRANSFER SWITCH WERE MELTED AND THAT IT WAS A THERMAL EVENT. THE GENERATOR WAS REPAIRED. THE MANUFACTURER WAS MADE AWARE OF THE FAILURE AND INFORMED THE CONTACT THAT… Look up ODI 11278413 at NHTSA ↗	0	0
Equipment	0	0	1 ODI 11278413 · 80 mi TL* THE CONTACT OWNS A 2015 THOR SIESTA EQUIPPED WITH A CUMMINS 3.6 KW GENERATOR. THE CONTACT ATTEMPTED TO START THE GENERATOR, BUT WAS UNSUCCESSFUL. IN ADDITION, THERE WAS AN ABNORMAL ODOR IN THE VEHICLE PRIOR TO THE FAILURE. THE GENERATOR WAS TAKEN TO CUMMINS SALES AND SERVICE (12 INTEGRA DR, CONCORD, NH 03301, [phone removed]) WHERE THE CONTACT WAS INFORMED THAT THE WIRES IN THE TRANSFER SWITCH WERE MELTED AND THAT IT WAS A THERMAL EVENT. THE GENERATOR WAS REPAIRED. THE MANUFACTURER WAS MADE AWARE OF THE FAILURE AND INFORMED THE CONTACT THAT… Look up ODI 11278413 at NHTSA ↗	—	0	0
Equipment:Recreational Vehicle/Trailer	0	0	0	0	—	1 ODI 11521206 After the gas powered fridge was turned on. Approximately an hour later the back side of the unit was in flames causing extensive damage and totaling the RV. The failure of the equipment caused the fire. This problem has been ongoing with similar models and is well documented. Has been investigated by a Fire Inspector. Look up ODI 11521206 at NHTSA ↗
Equipment:Recreational Vehicle/Trailer:Lpg Systems	0	0	0	0	1 ODI 11521206 After the gas powered fridge was turned on. Approximately an hour later the back side of the unit was in flames causing extensive damage and totaling the RV. The failure of the equipment caused the fire. This problem has been ongoing with similar models and is well documented. Has been investigated by a Fire Inspector. Look up ODI 11521206 at NHTSA ↗	—

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

1 patterns with matching reports.

Warning lights and dashboard alerts

1 mentions · 25.0% of complaints

Median mileage: Unavailable (0 usable records).

ODI 11464036

FRONT PASSENGER SIDE AIRBAG, CHRONIC WARNING LIGHTS, MULTIPLE REPAIR ATTEMPTS BY 1st and 2nd OWNER

Look up ODI 11464036 at NHTSA ↗

Matching rule

\b(warning light\w*|check engine|dashboard warning\w*|malfunction indicator)\b