No complaints are listed for the 2021 Paccar MX-11. NHTSA's API and bulk file list none in this build.
Data build 2026-10-08.
NHTSA lists this vehicle as PACCAR MX-11.
Complaints per 100k sold unavailable. No sales source is available for this record.
Model-generated complaint tags: No complaints are listed for tagging.
See new recalls and investigations this week.
0 recalls.
0 investigations; 0 open.
15 manufacturer communications.
| System | Count |
|---|---|
| ENGINE | 6 |
| ENGINE AND ENGINE COOLING | 5 |
| ELECTRICAL SYSTEM | 3 |
| POWER TRAIN | 3 |
| FUEL SYSTEM, DIESEL | 2 |
| FUEL/PROPULSION SYSTEM | 2 |
Date: 2026-09-11. Type: Service Bulletin/Repair Instructions. Systems: ENGINE.
"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."
Date: 2026-06-13. Type: Service Bulletin/Repair Instructions. Systems: ENGINE, POWER TRAIN.
The attached procedure has been updated to improve clarity.
Date: 2026-01-27. Type: Other. Systems: FUEL/PROPULSION SYSTEM.
DPF Delta Pressure Sensor part number 2200138 for MX-11 engines has been added to this warranty policy.
Date: 2025-12-03. Type: Service Bulletin/Repair Instructions. Systems: ELECTRICAL SYSTEM, ENGINE.
A new Level 1 required MX-11 and MX-13 Oil Pressure Switch Breakout Harness is now available for order.
Date: 2025-10-07. Type: Emissions. Systems: ENGINE, POWER TRAIN.
In an MX Engine is replaced, a TCS365 case must be opened to get a replacement engine emissions compliance label and expert level rights for resetting and programming the engine control module.
Date: 2025-08-22. Type: Emissions. Systems: FUEL/PROPULSION SYSTEM.
Part number 2300479 Engine Control Module has been added to the parts table for PACCAR MX-11EMY2021. Part number 2302109 Engine Control Module has been added to the parts table for PACCAR MX-11 andMX-13 EMY2023. Per Environment and Climate Change Canada (ECCC) regulations and guidance (Canadian Envi
Date: 2025-02-27. Type: Emissions. Systems: ELECTRICAL SYSTEM, ENGINE.
"PSB E327: PACCAR MX-11 and MX-13 OBD Software Update Vehicles equipped with PACCAR MX engines with Engine Software Version NA202 or NA206 may display a dash STOP lamp incorrectly. PCI-2 software on these chassis must be reverted from NA202 to NA201 (Pack 2 injectors) or from NA206 to NA191 (Pack 1
Date: 2024-10-08. Type: Service Bulletin/Repair Instructions. Systems: ENGINE.
EPA21 Pack 2 Injectors Newly designed fuel injectors are available for EPA2021 compliant PACCAR MX-series engines to optimize engine performance. Injectors must be replaced as a full set (6 injectors) and associated software must be updated at the same time.
Date: 2024-04-30. Type: Service Bulletin/Repair Instructions. Systems: ENGINE AND ENGINE COOLING, FUEL SYSTEM, DIESEL, POWER TRAIN.
Certain chassis that completed the E310 software update and received the specified in-tank additive may require additional doses of the in-tank additive. This bulletin covers additional additive eligibility criteria and filing.
Date: 2022-06-08. Type: Service Bulletin/Repair Instructions. Systems: ELECTRICAL SYSTEM.
Info Only: LIN hybrid switch harnesses are available to order from PACCAR Parts.
None listed.
| NHTSA model label | Complaints |
|---|---|
| MX-11 | 0 |
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curl "https://api.theusedcarindex.com/v1/demo/vehicle_risk?make=Paccar&model=MX-11&year=2021"Paid endpoint: https://api.theusedcarindex.com/v1/vehicle_risk. MCP endpoint: https://api.theusedcarindex.com/mcp.