2021 Peterbilt 337 Problems, Complaints & Recalls
- Compared with other 337 years
- Not enough data 3rd of 16 for complaints
- Safety recalls
- 2 recalls: check your VIN
- NHTSA crash rating
- Not rated
NHTSA has received no owner complaints about the 2021 Peterbilt 337 so far. There are 2 safety recalls covering this model year.
- 0owner complaints
- 2safety recalls
- 0NHTSA investigations
- 0complaints mentioning a crash
Complaints are unverified owner reports and are not adjusted for sales volume.
2021 Peterbilt 337 recalls (2)
Tap a recall to see the problem, the risk and the fix.
Service brakes, hydraulic:antilock/traction control/electronic limited slip:control unit/module; electrical system:software
Problem: PACCAR Incorporated (PACCAR) is recalling certain 2021-2025 Peterbilt and Kenworth vehicles, equipped with Bendix EC80 Advanced Electronic Control Units (ECU). Please see the recall report for a complete list of models. Electrical noise and low signal to the power line carrier may cause the ECU to incorrectly process commands or stop functioning.
Risk: Safety systems that depend on the ECU (Automatic Traction Control, ABS, Electronic Stability Control, Active Cruise Control, and Collison Mitigation System) may not function properly or at all, increasing the risk of a crash.
Fix: Dealers will reprogram the ECU software, free of charge. Owner notification letters were mailed February 3, 2025. Owners may contact Kenworth's customer service at 1-425-828-5888 and Peterbilt's customer service at 1-940-591-4220. PACCAR's numbers for this recall are 24KWL and 24PBL.
Fuel system, diesel:fuel injection system:fuel rail
Problem: PACCAR Incorporated (PACCAR) is recalling certain 2018-2021 Peterbilt 337, 348, 365, 367, 520, 567, Kenworth T270, T370, T440, T470, T800 and T880 vehicles. The sealing washer may not seat correctly in the pilot bore holes, allowing the high pressure fuel rail assembly to leak.
Risk: A fuel leak in the presence of an ignition source increases the risk of a fire.
Fix: Dealers will inspect the rail threads and fuel lines, and replace the rail as necessary, free of charge. Owners may contact PACCAR customer service at 1-425-828-5888 (Kenworth) or 1-940-591-4220 (Peterbilt). PACCAR's numbers for this recall are 21KWC and 21PBD.
To see whether a specific car still has an open recall, enter its VIN on NHTSA's official recall lookup. You can also decode a VIN here.
Other Peterbilt 337 years
| Year | Complaints | Recalls |
|---|---|---|
| 2023 337 | 0 | 2 |
| 2022 337 | 0 | 2 |
| 2021 | 0 | 2 |
| 2020 337 | 0 | 3 |
| 2019 337 | 0 | 5 |
| 2018 337 | 0 | 4 |
| 2017 337 | 0 | 3 |
| 2016 337 | 2 | 5 |
| 2015 337 | 0 | 6 |
| 2014 337 | 1 | 6 |
| 2013 337 | 0 | 5 |
| 2012 337 | 0 | 7 |
| 2011 337 | 0 | 7 |
| 2010 337 | 0 | 5 |
| 2009 337 | 0 | 2 |
| 2008 337 | 0 | 2 |
See all Peterbilt 337 problems by year, every Peterbilt model, or the VIN decoder.
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Frequently asked questions
What are the most common problems with the 2021 Peterbilt 337?
NHTSA has no owner complaints on file yet.
Was there a recall on the 2021 Peterbilt 337?
Yes, 2 safety recalls. Enter your VIN at NHTSA.gov to check whether the repairs were done on your car.
Was the 2021 Peterbilt 337 a good year?
Complaint data can't fully answer that, because counts aren't adjusted for sales. Compared with other 337 model years, the 2021 has too little data to compare. Always get a pre-purchase inspection and check the VIN for open recalls.