repaired · 2026 Q3
Electrical system: software
Risk. Safety systems that depend on the ECU (Automatic Traction Control, ABS, Electronic Stability Control, Active Cruise Control, and Collison Mitigation System)…
2021 Peterbilt 337Problems, recalls & complaints
NHTSA has logged 0 owner complaints about the 2021 Peterbilt 337. It is covered by 2 safety recalls, and for recall 21V-391 the manufacturer reports only 45% of affected cars repaired.
Source: NHTSA complaints, recalls, investigations and manufacturer recall reports, through December 9, 2024. Updated daily.
Complaints by system
Where the 2021 Peterbilt 337 has problems
0 complaints grouped by the system owners reported.
| System | Complaints | Crash, fire or injury |
|---|
Source: NHTSA Office of Defects Investigation. Complaints are submitted by the public and are not verified by NHTSA.
2 recalls
2021 Peterbilt 337 recalls and how many were fixed
Each ring shows the share of affected cars repaired, from the manufacturer’s latest quarterly report to NHTSA. Recall repairs are free at authorized dealers.
repaired · 2023 Q2
Fuel injection system: fuel rail
Risk. A fuel leak in the presence of an ignition source increases the risk of a fire.
Recalls apply to specific cars. To see whether a recall is still open on yours, enter the 17-character VIN at nhtsa.gov/recalls or with Peterbilt.
Best & worst years
2021 vs. every other 337 year
Bars show complaints per model year. Colors show the CarFlaw verdict: complaints weighted for crashes, fires and injuries, adjusted for years on the road and compared with the 337 median. How we score
'08'09'10'11'12'13'14'15'16'17'18'19'20'21'22'23
- Avoid
- Caution
- Solid
- Best
- Not rated
Own a 2021 337?
Decode your VIN to see the recalls for your exact car, then confirm open recalls with NHTSA.