No complaints are listed for the 2020 Paccar MX-11. NHTSA's API and bulk file list none in this build.
Data build 2026-10-07.
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.
0 recalls.
0 investigations; 0 open.
15 manufacturer communications.
| System | Count |
|---|---|
| ENGINE | 8 |
| ENGINE AND ENGINE COOLING | 5 |
| ELECTRICAL SYSTEM | 3 |
| EQUIPMENT | 3 |
| POWER TRAIN | 2 |
| FUEL SYSTEM, DIESEL | 1 |
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: 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: 2025-03-01. Type: Emissions. Systems: ENGINE.
Certain chassis equipped with a PACCAR MX-11 EMY18 engine are eligible to receive software improvements to increase vehicle uptime and functionality of emissions fault detection. The software updates will allow Forward NOx sensor deviations to be detected prior to OBD Emission Limit (OBDEL) exceedan
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: 2022-06-08. Type: Service Bulletin/Repair Instructions. Systems: ELECTRICAL SYSTEM.
Info Only: LIN hybrid switch harnesses are available to order from PACCAR Parts.
Date: 2021-09-21. Type: Service Bulletin/Repair Instructions. Systems: FUEL SYSTEM, DIESEL.
Fix-As-Fail A?A A Due to undersupply issues, only a limited supply of Diesel Exhaust Fluid (DEF) sensors are available. As a temporary solution, after PACCAR confirms a DEF sensor is not available, a temporary software update will allow a vehicle to continue operation with a failed DEF sensor by di
Date: 2021-07-20. Type: Service Bulletin/Repair Instructions. Systems: ENGINE AND ENGINE COOLING.
Emissions Recall - PACCAR MX-13 Engine Model Year 2015B engines require a software update to ensure emissions compliance for On-Board Diagnostic (OBD).
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=2020"Paid endpoint: https://api.theusedcarindex.com/v1/vehicle_risk. MCP endpoint: https://api.theusedcarindex.com/mcp.