2020 Kenworth T660 problems, complaints & recalls
Safety recalls (1)
Seat Belts 2023-10-26 · campaign 23V717000 · 3,841 vehicles
Defect: PACCAR Incorporated (PACCAR) is recalling certain 2020 Kenworth T660, 2018-2024 Kenworth T800 and W900 vehicles. An additional spacer may have been added to the joint that connects the seat to the seat belt tether and buckle, causing an unsecured connection.
Risk: An unsecured seat belt connection may not properly restrain an occupant during a crash, increasing their risk of injury.
Fix: Dealers will inspect and remove the additional spacer and replace the bolt, as necessary, free of charge. Owner letters were mailed March 20, 2024. Owners may contact PACCAR's customer service at 1-425-828-5888. PACCAR's number for this recall is 23KWK.
Service bulletins (5)
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."
Service Brakes 2025-10-28 · 24KWD · Service Bulletin/Repair Instructions
safety recall additional chassis have been included. the chassis list has been updated. certain t370 / t440 / t470 / t480 / t660 / t680 / t800 / t880 / w900 / c500 chassis may be equipped with air tank reservoirs that have less than twelve times the combined volume of all service brake chambers whic
Service Brakes, Air 2024-04-09 · 24KWD · Service Bulletin/Repair Instructions
certain c500/t440/t470/t660/t680/t800/t880/w900 chassis may have air tank reservoirs that do not meet air volume requirements per fmvss/cmvss 121 ã¢ââair brake systemsã¢ââ. this bulletin will be updated when repair parts and procedures are available.
Seats 2024-03-01 · 23KWK · Service Bulletin/Repair Instructions
safety recall repair parts and procedures are now available. on certain kenworth model years 2018 through 2024 c500/t660/t800/w900 trucks with sears atlas 70 or 80 series seats, a spacer was installed on the seatbelt mounting assembly. in a severe collision, the icp bar may fail, increasing the ris
Seats 2023-11-28 · 23KWK · Service Bulletin/Repair Instructions
safety recall interim notification on certain kenworth model year 2018 through 2024 c500/t660/t800/w900 trucks with sears atlas 70 or 80 series seats, an additional spacer was installed on the seatbelt mounting assembly. in a severe collision, the icp bar may fail allowing the seatbelt to slip, in
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.