2021 Tiffin ALLEGRO BUS problems and owner complaints
Explore the records behind recurring owner reports.
Key facts
0 owner complaints analyzed
2 distinct recall campaigns
Not available median reported failure mileage
Scope: 2021 model year. Data updated: . 0 complaints include usable failure mileage. View data status.
This selection has limited data. It remains available for lookup but is excluded from search indexing.
Most common problems
No owner complaints are recorded for this selection. A complaint can name multiple components.
Component breakdown
Number of unique complaints naming each component. Top eight shown.
No usable records for this chart.
| Category | Count |
|---|
No records.
Reported problems by failure mileage
Complaint counts in mileage bands. These are not failure rates per vehicle or mile.
| Category | Count |
|---|---|
| Under 25,000 | 0 |
| 25,000 to 49,999 | 0 |
| 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: 0; 25,000 to 49,999: 0; 50,000 to 74,999: 0; 75,000 to 99,999: 0; 100,000 to 149,999: 0; 150,000 and above: 0
No usable failure mileage is recorded. 0 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.
No usable records for this chart.
| Category | Count |
|---|
No records.
Pattern summary
There is not enough complaint evidence to summarize patterns.
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.
Vehicle analysis explorer
Inspect model-year patterns, reported mileage, monthly activity and the evidence behind each signal.
Data completeness
0 unique complaints in this selection. Analysis snapshot: 2026-10-01.
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.
| Component | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 | 2027 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Engine | 1100.0%ODI 11093752 · 83,000 miCOOLING SYSTEM FAN DRIVE BELT TENSIONER DEVELOPS CRACKS THAT PROGRESS TO THE POINT OF CATASTROPHIC FAILURE WHERE HALF THE BRACKET END AND TWO HEAVY PULLEYS ARE EJECTED FROM THE VEHICLE BY THE FAST MOVING FAN BELT.. THIS HAS BEEN A KNOWN PROBLEM AND TIFFIN HAS REDESIGNED THE BRACKET AND IS REPAIRING THEM AS THEY FAIL. THERE HAVE BEEN NUMEROUS FAILURES AND POSTS ABOUT THEM POSTED IN THE ON-LINE RECREATIONAL VEHICLE FORUMS. AS A RESULT OF THESE POSTS, I ADDED A CHECK OF THIS BRACKET TO MY MAINTENANCE CHECKLIST. A MAJOR MAINTENANCE CYCLE WAS COMPLE… | 1100.0%ODI 11349293 · 45,000 miAT HIGHWAY SPEED, DASH LIT UP WITH WARNING LIGHTS, DASH SOUNDED ALARMS, MOBILE EYE FLASHED ERR..AND DASH DISPLAY FLASHED ABS COMM ERROR! 60 SECONDS LATTER THE ENGINE STOPPED (EVERYTHING DEAD)...BUT MOTOR COACH STILL MOVING WITH NO POWER STEERING! LUCKILY I WAS ABLE TO STOP THE COACH IN A BUSY EXIT LANE. AFTER 4 HOURS (POLICE STAYED WITH US THE ENTIRE TIME)...WAS ABLE TO RESET ECM ERROR CODE AND START THE ENGINE. AFTER CONTACTING TIFFIN, THEY ADVISED TO DISCONNECT MOBILE EYE UNDER DASH. SPENT 1 HOUR UNDER DASH (WHILE IN TRAFFIC) TRYING TO FIN… | 150.0%ODI 11128294 · 15,672 miTHIS IS NOT A SINGLE ISOLATED INCIDENT. THERE HAVE BEEN A LARGE NUMBER OF OWNERS WITH THIS ISSUE AND THE MANUFACTURER HAS NOT PROVIDED AN ACCEPTABLE SOLUTION. *DT ON THE 2015-2018 TIFFIN ALLEGRO BUS ON THE POWER GLIDE CHASSIS, A CRITICAL DESIGN DEFECT EXISTS WITH THE ENGINE FAN DRIVE TENSIONER BRACKET AND TENSIONER PULLEY ASSEMBLY. THE FAN DRIVE IS DESIGNED TO ENGAGE AT A PRE-DETERMINED ENGINE COOLANT TEMPERATURE AND IS UTILIZED TO LOWER ENGINE TEMPERATURE AS THE ENGINE COOLANT TEMPERATURE REACHES A HIGH LEVEL. THE TENSIONER BRACKET IS CO… | 0UnavailableNo examples available for this selection. | 00.0%No examples available for this selection. | 00.0%No examples available for this selection. | 0UnavailableNo examples available for this selection. | 00.0%No examples available for this selection. | 0UnavailableNo examples available for this selection. | 0UnavailableNo examples available for this selection. | 150.0% | 0UnavailableNo examples available for this selection. | 0UnavailableNo examples available for this selection. | 0UnavailableNo examples available for this selection. | 0UnavailableNo examples available for this selection. |
| Fuel System, Diesel | 00.0%No examples available for this selection. | 00.0%No examples available for this selection. | 00.0%No examples available for this selection. | 0UnavailableNo examples available for this selection. | 00.0%No examples available for this selection. | 1100.0%ODI 11435124 · 8,000 miThe contact owns a 2018 Tiffin Allegro Bus. The contact stated that while driving at various speeds, the vehicle would independently downshift as the Diesel Exhaust Fluid (DEF) warning light would illuminate. The manufacturer was notified of the failure and the contact was informed that they were aware of the failure; however, parts for the repair was unavailable. The vehicle had yet to be repaired. The failure mileage was approximately 8,000. | 0UnavailableNo examples available for this selection. | 150.0%ODI 11458968The contact owns a 2020 Tiffin Allegro Bus. The contact received a notification for NHTSA Campaign Number: 21E320000 (Fuel System, Diesel). The dealer had been notified about the recall and informed him that if the fuel rails were stable upon inspection of the vehicle, they could make needed reinforcements and return the vehicle; however, if the fuel rails needed replacement, the vehicle would have to remain in the dealer's possession until parts became available. The manufacturer had been notified of the recall. The contact stated that the man… | 0UnavailableNo examples available for this selection. | 0UnavailableNo examples available for this selection. | 00.0%No examples available for this selection. | 0UnavailableNo examples available for this selection. | 0UnavailableNo examples available for this selection. | 0UnavailableNo examples available for this selection. | 0UnavailableNo examples available for this selection. |
| Tires | 00.0%No examples available for this selection. | 00.0%No examples available for this selection. | 00.0%No examples available for this selection. | 0UnavailableNo examples available for this selection. | 00.0%No examples available for this selection. | 00.0%No examples available for this selection. | 0UnavailableNo examples available for this selection. | 00.0%No examples available for this selection. | 0UnavailableNo examples available for this selection. | 0UnavailableNo examples available for this selection. | 00.0%No examples available for this selection. | 0UnavailableNo examples available for this selection. | 0UnavailableNo examples available for this selection. | 0UnavailableNo examples available for this selection. | 0UnavailableNo examples available for this selection. |
| Unknown Or Other | 00.0%No examples available for this selection. | 00.0%No examples available for this selection. | 150.0%ODI 11654266No accident happened. I purchased a motorhome had two new tires steering tires 315 8022 five size tires when they hot driving is a tremendous shake to the front end and I’ve had it back to the tire company and nobody seems to want to do anything to help me? I think it’s a bad safety issue you could lose control of the motorhome. It’s 45 foot And the brand of the tire is. Yokohama I have filed a complaint with him. They have no one seems they won’t call me back. She told me to go to some dealer and I talked to the dealer and the dealer says no … | 0UnavailableNo examples available for this selection. | 00.0%No examples available for this selection. | 00.0%No examples available for this selection. | 0UnavailableNo examples available for this selection. | 00.0%No examples available for this selection. | 0UnavailableNo examples available for this selection. | 0UnavailableNo examples available for this selection. | 00.0%No examples available for this selection. | 0UnavailableNo examples available for this selection. | 0UnavailableNo examples available for this selection. | 0UnavailableNo examples available for this selection. | 0UnavailableNo examples available for this selection. |
| Electronic Stability Control (Esc) | 00.0%No examples available for this selection. | 1100.0%ODI 11349293 · 45,000 miAT HIGHWAY SPEED, DASH LIT UP WITH WARNING LIGHTS, DASH SOUNDED ALARMS, MOBILE EYE FLASHED ERR..AND DASH DISPLAY FLASHED ABS COMM ERROR! 60 SECONDS LATTER THE ENGINE STOPPED (EVERYTHING DEAD)...BUT MOTOR COACH STILL MOVING WITH NO POWER STEERING! LUCKILY I WAS ABLE TO STOP THE COACH IN A BUSY EXIT LANE. AFTER 4 HOURS (POLICE STAYED WITH US THE ENTIRE TIME)...WAS ABLE TO RESET ECM ERROR CODE AND START THE ENGINE. AFTER CONTACTING TIFFIN, THEY ADVISED TO DISCONNECT MOBILE EYE UNDER DASH. SPENT 1 HOUR UNDER DASH (WHILE IN TRAFFIC) TRYING TO FIN… | 00.0%No examples available for this selection. | 0UnavailableNo examples available for this selection. | 00.0%No examples available for this selection. | 00.0%No examples available for this selection. | 0UnavailableNo examples available for this selection. | 00.0%No examples available for this selection. | 0UnavailableNo examples available for this selection. | 0UnavailableNo examples available for this selection. | 00.0%No examples available for this selection. | 0UnavailableNo examples available for this selection. | 0UnavailableNo examples available for this selection. | 0UnavailableNo examples available for this selection. | 0UnavailableNo 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. | 00.0%No examples available for this selection. | 0UnavailableNo examples available for this selection. | 00.0%No examples available for this selection. | 00.0%No examples available for this selection. | 0UnavailableNo examples available for this selection. | 00.0%No examples available for this selection. | 0UnavailableNo examples available for this selection. | 0UnavailableNo examples available for this selection. | 00.0%No examples available for this selection. | 0UnavailableNo examples available for this selection. | 0UnavailableNo examples available for this selection. | 0UnavailableNo examples available for this selection. | 0UnavailableNo examples available for this selection. |
| Engine And Engine Cooling:Exhaust System:Emission Control | 00.0%No examples available for this selection. | 00.0%No examples available for this selection. | 00.0%No examples available for this selection. | 0UnavailableNo examples available for this selection. | 00.0%No examples available for this selection. | 00.0%No examples available for this selection. | 0UnavailableNo examples available for this selection. | 00.0%No examples available for this selection. | 0UnavailableNo examples available for this selection. | 0UnavailableNo examples available for this selection. | 00.0%No examples available for this selection. | 0UnavailableNo examples available for this selection. | 0UnavailableNo examples available for this selection. | 0UnavailableNo examples available for this selection. | 0UnavailableNo examples available for this selection. |
| Exterior Lighting | 00.0%No examples available for this selection. | 00.0%No examples available for this selection. | 00.0%No examples available for this selection. | 0UnavailableNo examples available for this selection. | 00.0%No examples available for this selection. | 00.0%No examples available for this selection. | 0UnavailableNo examples available for this selection. | 00.0%No examples available for this selection. | 0UnavailableNo examples available for this selection. | 0UnavailableNo examples available for this selection. | 00.0%No examples available for this selection. | 0UnavailableNo examples available for this selection. | 0UnavailableNo examples available for this selection. | 0UnavailableNo examples available for this selection. | 0UnavailableNo 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 | Mileage range (25th–75th percentile) | Median | Usable records | Examples |
|---|---|---|---|---|
| No usable records for this analysis. | ||||
Complaint and recall timeline
Explore monthly filing activity alongside recall announcements. Up to ten years of monthly history is available.
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
| Month | Complaints | Campaigns announced | Examples |
|---|---|---|---|
| 2024-11 | 0 | None | No examples available for this selection. |
| 2024-12 | 0 | None | No examples available for this selection. |
| 2025-01 | 0 | None | No examples available for this selection. |
| 2025-02 | 0 | None | No examples available for this selection. |
| 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.
2022: 0 complaints · 2023: 2 complaints
| Model year | Through age 0 | Through age 1 | Through age 2 |
|---|---|---|---|
| 2022 | 0 | 0 | 0 |
| 2023 | 0 | 2 | 2 |
Date coverage across each selected cohort
| Year | Incident dates used | Filing date fallbacks | Excluded dates |
|---|---|---|---|
| 2022 | 0 | 0 | 0 |
| 2023 | 2 | 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 |
|---|
| No usable records for this analysis. |
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.
0 patterns with matching reports.
No narratives match the published patterns.