AI DamageKenworth T660: problems, complaints, bulletins
Summary for the Kenworth T660 across 5 model years: 0 owner complaints and 24 NHTSA service bulletins, plus repair videos. Pick a year for details.
Model years
Components owners complain about
| Component | Owner complaints | involving a crash | Technical service bulletins (TSB) |
|---|---|---|---|
| Electrical system | 0 | 0 | 16 |
| Equipment | 0 | 0 | 16 |
| Service brakes | 0 | 0 | 13 |
| Engine and cooling | 0 | 0 | 12 |
| Engine | 0 | 0 | 7 |
| Seat belts | 0 | 0 | 6 |
| Seats | 0 | 0 | 6 |
| Fuel system | 0 | 0 | 4 |
| Powertrain | 0 | 0 | 4 |
| Structure | 0 | 0 | 4 |
| Visibility | 0 | 0 | 4 |
| Wheels | 0 | 0 | 4 |
| Vehicle speed control | 0 | 0 | 3 |
| Other | 0 | 0 | 3 |
What to check before buying
- Electrical system. Scan all modules, test the battery and alternator, inspect connectors near the impact zone.
- Service brakes. Pedal feel, ABS operation, leaks, discs and hoses.
- Engine and cooling. Radiator and fan after a frontal hit, coolant level and condition, overheating.
- Engine. Cold start, unusual noises, oil leaks and engine codes.
Manufacturer service bulletins
Bulletin titles as filed with NHTSA.
- "Kenworth
- CARB Chassis Update - Chassis list updated with 5 KW and 31 PB additional chassis
- SAFETY RECALL Additional chassis have been included
- Certain C500/T440/T470/T660/T680/T800/T880/W900 chassis may have air tank reservoirs that do not meet air…
- Safety Recall Repair parts and procedures are now available
- Safety Recall Interim Notification On certain Kenworth model year 2018 through 2024 C500/T660/T800/W900…
- Certain chassis with Engine Model Year 2016-2021 PACCAR MX-11/MX-13, or EPA13 and EPA21 Cummins…
- Info Only - PACCAR is introducing Over-the-Air (OTA) software updates for engine MY17 and newer chassis…
- Kenworth is providing guidance for PACCAR MX Engine Composite Oil Pan leak troubleshooting to avoid…
- Fix-As-Fail â Due to undersupply issues, only a limited supply of Diesel Exhaust Fluid (DEF) sensors are…
- Information Only â Windshield washer pumps have a high No Trouble Found rate
- Fix-As-Fail - Prior versions of Eaton Endurant transmission software may be prone to setting Linear Clutch…
Other models of this make
Read also
Sources: public NHTSA data (USA): service bulletins and owner complaints; YouTube: links to videos credited to their authors. Complaints are owner statements not verified by NHTSA, and describe defects rather than crash damage. Data updated 2026-11-04.