2021 Peterbilt 337

Routine

No owner complaints are on file for this vehicle. It has been recalled 2 times.

2 safety recalls

Part 573 reports

Electrical System › Software24V915000

Filed Dec 9, 2024220,764 vehiclesPaccar Incorporated

Defect. 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.

Remedy. 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 Rail21V391000

Filed May 26, 2021612 vehiclesPaccar Incorporated

Defect. 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.

Remedy. 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.

Across model years

Worst on record: 2016

Year	Complaints	Recalls	Assessment
2023	0	2	Routine
2022	0	2	Routine
2021 — this page	0	2	Routine
2020	0	3	Routine
2019	0	5	Routine
2018	0	4	Routine
2017	0	3	Routine
2016	2	5	Routine
2015	0	6	Routine
2014	1	6	Routine
2013	0	5	Routine
2012	0	7	Routine
2011	0	7	Routine
2010	0	5	Routine
2009	0	2	Routine
2008	0	2	Routine

Compare every 337 year →

Other Peterbilt models

All Peterbilt models →

379 60 579 42 Peterbilt 29 389 22 388 21 357 19 386 12 387 11 Conventional 8 567 8

Reading this record

No unusual pattern of severe incidents in the complaint record.

Complaint counts track how many cars were sold and how long they have been on the road as much as they track quality. A common model from 2013 has had a decade to accumulate reports; a rare one from last year has not. The signal worth weighing is in the severity columns, in whether the same component keeps appearing, and in whether the manufacturer eventually opened a recall for it.

Recall repairs are free for as long as the recall stands. Check whether a specific car still has open work at NHTSA's VIN lookup.

Most recent recall on file: Dec 9, 2024. Source: NHTSA Office of Defects Investigation.