AI DamagePaccar MX-11: problems, complaints, bulletins
Summary for the Paccar MX-11 across 6 model years: 0 owner complaints and 51 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) |
|---|---|---|---|
| Engine and cooling | 0 | 0 | 43 |
| Engine | 0 | 0 | 33 |
| Equipment | 0 | 0 | 15 |
| Powertrain | 0 | 0 | 15 |
| Electrical system | 0 | 0 | 12 |
| Fuel system | 0 | 0 | 8 |
| Structure | 0 | 0 | 3 |
| Fuel/propulsion system | 0 | 0 | 2 |
| Vehicle speed control | 0 | 0 | 2 |
| Wheels | 0 | 0 | 2 |
What to check before buying
- 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.
- Powertrain. Shift quality under load, harsh shifts, transmission codes, CV joints.
- Electrical system. Scan all modules, test the battery and alternator, inspect connectors near the impact zone.
Manufacturer service bulletins
Bulletin titles as filed with NHTSA.
- "Kenworth
- The attached procedure has been updated to improve clarity
- DPF Delta Pressure Sensor part number 2200138 for MX-11 engines has been added to this warranty policy
- A new Level 1 required MX-11 and MX-13 Oil Pressure Switch Breakout Harness is now available for order
- In an MX Engine is replaced, a TCS365 case must be opened to get a replacement engine emissions compliance…
- Part number 2300479 Engine Control Module has been added to the parts table for PACCAR MX-11EMY2021
- "PSB E327
- Certain chassis equipped with a PACCAR MX-11 EMY18 engine are eligible to receive software improvements to…
- Certain chassis equipped with a PACCAR MX-11 EMY18 engine are eligible to receive software improvements to…
- EPA21 Pack 2 Injectors Newly designed fuel injectors are available for EPA2021 compliant PACCAR MX-series…
- Certain chassis that completed the E310 software update and received the specified in-tank additive may…
- Added extension to 8/31/2024 Certain Engine Model Year 2018 PACCAR MX-11 engines must have the crankcase…
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.