Date: 2024-12-09. Systems: ELECTRICAL SYSTEM, SERVICE BRAKES, HYDRAULIC.
Defect: PACCAR Incorporated (PACCAR) is recalling certain 2021-2025 Peterbilt and Kenworth vehicles, equipped with Bendix EC80 Advanced Electronic Control Units (ECU). Please see the recall report for a complete list of models. Electrical noise and low signal to the power line carrier may cause the ECU to incorrectly process commands or stop functioning.
Consequence: Safety systems that depend on the ECU (Automatic Traction Control, ABS, Electronic Stability Control, Active Cruise Control, and Collison Mitigation System) may not function properly or at all, increasing the risk of a crash.
Remedy: Dealers will reprogram the ECU software, free of charge. Owner notification letters were mailed February 3, 2025. Owners may contact Kenworth's customer service at 1-425-828-5888 and Peterbilt's customer service at 1-940-591-4220. PACCAR's numbers for this recall are 24KWL and 24PBL.
Do not drive: No. Park outside: No.
Investigations
0 investigations; 0 open.
Manufacturer communications
17 manufacturer communications.
Communications by system
System
Count
ENGINE
12
ELECTRICAL SYSTEM
4
FORWARD COLLISION AVOIDANCE
2
ENGINE AND ENGINE COOLING
1
FUEL/PROPULSION SYSTEM
1
POWER TRAIN
1
UNKNOWN OR OTHER
1
11037541
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."
11036289
Date: 2026-08-13. Type: Service Bulletin/Repair Instructions. Systems: ENGINE.
The procedure has been updated to include additional steps for verifying the software level on the vehicle electronic control unit (VECU2) and digital display (DD). Steps have also been added to the PACCAR Common Rail Injection 2 (PCI2) software verification.
11036291
Date: 2026-08-13. Type: Service Bulletin/Repair Instructions. Systems: FORWARD COLLISION AVOIDANCE.
The verbiage in the Introduction section has been updated.
11035202
Date: 2026-07-21. Type: Service Bulletin/Repair Instructions. Systems: ENGINE.
This optional software update is now available for chassis equipped with EMY 2021B-2023 PACCAR MX-11 and MX-13 engines. This update provides customers with additional time to service their trucks before a DEF-related derate occurs. The software is being offered to customers in alignment with recentl
11035147
Date: 2026-07-10. Type: Service Bulletin/Repair Instructions. Systems: ENGINE.
The Condition, Chassis Affected, Service Action, Warranty, and Procedure sections have been updated to include the latest prognostics bulletin verbiage. The Warranty section has also been updated to include Peterbilt specific SRT codes for filing cross-division repairs.
11035108
Date: 2026-07-07. Type: Service Bulletin/Repair Instructions. Systems: ENGINE.
"The software is not yet available. The bulletin will be updated when more information is available."
11034394
Date: 2026-06-29. Type: Service Bulletin/Repair Instructions. Systems: ENGINE.
"An optional software update will be available on 07/06/2026 for chassis equipped with EMY 2021B-2023PACCAR MX-11 and MX-13 engines. This update provides customers with additional time to service theirtrucks before a DEF-related derate occurs. The software is being offered to customers in alignment
11033918
Date: 2026-06-03. Type: Service Bulletin/Repair Instructions. Systems: ELECTRICAL SYSTEM.
"KW: A new recommended repair has been added to verify the software level and close the campaign in SIR.The repair procedure has been updated with additional note boxes for clear instructions. PB: The repair procedure has been updated with additional note boxes for clear instructions."
11032288
Date: 2026-04-30. Type: Service Campaign. Systems: ENGINE.
Certain EPA21 PACCAR MX engines are equipped with PHINIA fuel injectors that do not meet PHINIAa s manufacturing specifications.
11032293
Date: 2026-04-17. Type: Service Bulletin/Repair Instructions. Systems: ENGINE.
The attached procedures document has been updated with more detail and explanations. This is not a stand-alone procedure. Cummins Quickserve troubleshooting will specify the use of these procedures while troubleshooting specific fault codes.
Notes on this record
Complaints from the API and bulk file are merged and deduplicated by ODI number; the API alone misses records.
System and subsystem counts are numbers of distinct complaints, recalls or communications that name them. One record can name several systems, so shares across systems can add to more than 100 percent; a single share never exceeds 100 percent.
Recalls are counted once per campaign, investigations once per action and manufacturer communications once per NHTSA id, even when NHTSA lists several model names for the same record.
A sales denominator is a calendar-year proxy, not the population of vehicles still in use. Rates are copied from verified pipeline output.
NHTSA's complaints API and bulk file list no complaint for this make, model and model year in this data build.