2020 Peterbilt 548 problems, complaints & recalls
Safety recalls (1)
Service Brakes, Air 2023-09-29 · campaign 23V661000 · 254 vehicles
Defect: PACCAR Incorporated (PACCAR) is recalling certain 2021-2024 Kenworth T280, T380, 2020-2024 Peterbilt 548, 536, 2024 Peterbilt 537, and 2020-2024 Kenworth T480 trucks. The timing of the trailer brake release may be delayed. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 121, "Air Brake Systems."
Risk: A delay in the trailer brake release can create instability to the trailer and increase the risk of a crash.
Fix: Dealers will replace the fittings and hoses in the affected valves, free of charge. Owner letters were mailed January 15, 2024. 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 23KWJ and 23PBJ.
Service bulletins (18)
Technical service bulletins are repair instructions manufacturers send dealers for known issues. Unlike recalls, the fix is not automatically free — but naming the bulletin at the service desk can save diagnosis time and support goodwill repairs.
Engine 2026-09-11 · P001 · Service Bulletin/Repair Instructions
"kenworth: dealers should check the chassis list and sir weekly for vin changes. 2 chassis added to the chassis list. peterbilt: dealers should check the chassis list and sir weekly for vin changes. 10 chassis added to the chassis list."
Electrical System 2026-05-06 · 02-177 · Service Bulletin/Repair Instructions
troubleshooting procedures for 2.1m cab power windows are now available.
Unknown Or Other 2026-04-16 · 14-034 · Service Bulletin/Repair Instructions
bogie crossmember torque value update - procedure has been updated to correct torque values.
Engine 2026-02-03 · 45-069 · Service Bulletin/Repair Instructions
cummins tsb 210203 has been updated to remove the paccar suction side fuel filter part number from table 1 as the filter is no longer compatible.
Engine 2024-11-22 · 32-025 · Service Bulletin/Repair Instructions
info only unnecessary starter replacements can result from customer complaints regarding engine starting issues. a new starter troubleshooting guide has been created to provide a comprehensive list of starting system checks, which should reduce unnecessary starter replacements and associated warran
Engine 2024-05-16 · 41-027 · Service Bulletin/Repair Instructions
on certain peterbilt, new medium duty chassis that are equipped with the optional engine intake air pre-filter (option code 3281830) the pre-filter may become clogged and cause premature failure/breach of the primary intake air filter. in some cases, a failed/breached primary filter can result in un
Showing the 6 most recent of 18 bulletins. Search all of them free at nhtsa.gov.
What owners report
No detailed complaint narratives on file.
Excerpts of consumer complaints filed with NHTSA, lightly truncated. They are owner statements, not verified findings.