Complaints over time
Complaints about the 2021 Kenworth W900 peaked in 2024, with 1 filed
Owner complaints about this model year, by the year they were filed with NHTSA.
Source: NHTSA ODI complaints file. The lighter column runs through October.
Model year
2021 Kenworth W900
Heavy truck, diesel, 6x4, built in United States. Owner complaints on file from Mar 20, 2024 to Mar 20, 2024.
Recall campaigns covering this model year35,070 vehicles or units across those campaigns
Owner complaints1Close to the median 2021 heavy truck
Severity index0.02021 heavy trucks average 14.3
First 24 months0Complaints in its first two years
Components
Complaints by component
Owner complaints by component. Hover or focus a bar for the crash, fire, injury or death count.
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Source: NHTSA ODI complaints file. A complaint can name more than one component; it is counted under the first.
Recalls
3 recall campaigns cover the 2021 Kenworth W900
Check a specific vehicle by VIN on NHTSA's site: a campaign may cover only part of a model year's production.
| Campaign | Filed | Subject | Component | Vehicles | Remedy |
|---|---|---|---|---|---|
| 23V-717 | Oct 26, 2023 | Additional spacer may have been added to the joint that connects the seat to the seat belt tether and buckle, causing an unsecured connection | Seat belts | 3,841 | Part replacement |
| 21V-080 | Feb 17, 2021 | Capscrews that attach the flywheel to the crankshaft may have been improperly torqued, allowing the flywheel to detach | Engine and cooling | 132 | Repair or modification |
| 20V-506 | Aug 26, 2020 | Axles may have lower rear pivot bolts that are not long enough to sufficiently engage the locking feature of the corresponding nuts | Powertrain | 1,097 | Part replacement |
Source: NHTSA ODI recalls file.
Owner complaints
What owners reported about the 2021 Kenworth W900
The full text of every complaint filed with NHTSA about this model year, newest first. Complaints are filed by owners and are not verified by NHTSA; NHTSA removes personal details before publishing.
1 complaint on file, page 1 of 1.
- Filed Mar 20, 2024Failure Feb 14, 2024Las vegas, NVUnknown or other
Transmission issues
NHTSA complaint 11578489
Source: NHTSA ODI complaints file.
Investigations
NHTSA has not opened an investigation on this model year
Source: NHTSA ODI investigations file.
Service bulletins
30 manufacturer communications cover this model year
Technical service bulletins and other notices the manufacturer sent to dealers. A bulletin is not a recall.
- P001 Sep 11, 2026 · Service Bulletin/Repair Instructions
"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." - 24KWL/PBL Aug 13, 2026 · Service Bulletin/Repair Instructions
The verbiage in the Introduction section has been updated. - E311 Jun 6, 2026 · Service Bulletin/Repair Instructions
The PACCAR Powertrain Prognostics Webcast video link has been removed. It will be included with updated information at a later date. - E311 May 18, 2026 · Service Bulletin/Repair Instructions
Kenworth - The Warranty section has been updated to include Peterbilt-specific SRT codes for cross-division repair filing. - 14-034 Apr 16, 2026 · Service Bulletin/Repair Instructions
Bogie Crossmember Torque Value Update - Procedure has been updated to correct torque values. - 45-070 Jan 31, 2026 · Service Bulletin/Repair Instructions
Procedure pictures updated for clarity. When troubleshooting Cummins X15 fault codes 555 or 556, follow this additional testing, inspection, and documentation procedure to help identify the root cause of dusted engines. This is not a stand-alone process bu… - 43-076 Dec 31, 2025 · Service Bulletin/Repair Instructions
Certain vehicle model years 2020-2025 K270, K370, T270, T280, T370, T380, T480, T680, T880, W900 chassis have updated Greenhouse Gas (GHG) labels available for installation. - 24KWD Oct 28, 2025 · Service Bulletin/Repair Instructions
SAFETY RECALL Additional chassis have been included. The chassis list has been updated. Certain T370 / T440 / T470 / T480 / T660 / T680 / T800 / T880 / W900 / C500 chassis may be equipped with air tank reservoirs that have less than twelve times the combine… - E311 Aug 20, 2025 · Other
Condition, Chassis Affected, and Warranty sections updated with the following verbiage “E311 must be flagged and open in Service Information Record (SIR) at the time of RO open date to qualify.” Also, “Through Standard Warranty or any applicable active Exte… - 24KWD Apr 9, 2024 · Service Bulletin/Repair Instructions
Certain C500/T440/T470/T660/T680/T800/T880/W900 chassis may have air tank reservoirs that do not meet air volume requirements per FMVSS/CMVSS 121 âAir Brake Systemsâ. This bulletin will be updated when repair parts and procedures are available. - 23KWK Mar 1, 2024 · Service Bulletin/Repair Instructions
Safety Recall Repair parts and procedures are now available. On certain Kenworth model years 2018 through 2024 C500/T660/T800/W900 trucks with Sears Atlas 70 or 80 series seats, a spacer was installed on the seatbelt mounting assembly. In a severe collisio… - 23KWK Nov 28, 2023 · Service Bulletin/Repair Instructions
Safety Recall Interim Notification On certain Kenworth model year 2018 through 2024 C500/T660/T800/W900 trucks with Sears Atlas 70 or 80 series seats, an additional spacer was installed on the seatbelt mounting assembly. In a severe collision, the ICP bar… - E290 Jun 28, 2023 · Service Bulletin/Repair Instructions
FIX-AS-FAIL Updated procedures and claim filing information. EPA2021 injector cleaning is referenced in RMI for certain injector faults. Complete the procedures in E290. Refer to E300 for in-tank additive information - 43-072 Jun 2, 2023 · Service Bulletin/Repair Instructions
Certain chassis with Engine Model Year 2016-2021 PACCAR MX-11/MX-13, or EPA13 and EPA21 Cummins ISX12/ISX15/X15 engines that had a previously failed DEF sensor and with DEF sensor software disabled due to industry DEF sensor shortages will now be able to re… - E290 Mar 31, 2023 · Service Bulletin/Repair Instructions
FIX-AS-FAIL Updated procedures and claim filing information. EPA2021 injector cleaning is referenced in RMI for certain injector faults. Complete the procedures in E290. Refer to E300 for in-tank additive information - E300 Mar 31, 2023 · Service Bulletin/Repair Instructions
PACCAR will reimburse customers for the local purchase of in-tank fuel additive for EPA2021 compliant MX engines. This is a one-time reimbursement. Only customers who have received E290 injector cleaning qualify for this reimbursement. See bulletin for limi… - E303 Jan 12, 2023 · Service Bulletin/Repair Instructions
This campaign is the final opportunity to replace the oil filter screw cap to reduce occurrences of broken bypass valve tabs. Broken oil valve tabs can cause oil flow obstruction to critical engine parts, resulting in serious engine damage. Customers that d… - 45-064 Oct 18, 2022 · Service Bulletin/Repair Instructions
Info Only - PACCAR is introducing Over-the-Air (OTA) software updates for engine MY17 and newer chassis equipped with Cummins X15, X12, ISX12, ISX12N, L9N, PX-7, and PX-9 engines The technology will leverage the existing Remote Diagnostic cs hardware to del… - E296 Aug 3, 2022 · Service Bulletin/Repair Instructions
Kenworth is providing guidance for PACCAR MX Engine Composite Oil Pan leak troubleshooting to avoid over-repairs and to provide warrantable repair guidance. Oil leaks, if not repaired, can lead to severe engine damage. - 22KWB May 10, 2022 · Service Bulletin/Repair Instructions
Safety Recall â“ Interim Notification - The Dana D-Series front axle steer arm fasteners that attach the steer arm to the steering knuckle may fail, increasing the risk of a crash or injury. Repair information will be added when a repair procedure and parts… - 98-020 Mar 18, 2022 · Service Bulletin/Repair Instructions
nformation Only – New Level 1 required tools are available to support MY21B MX engines. - 51-013 Feb 4, 2022 · Service Bulletin/Repair Instructions
Due to major data carriers phasing out 3G networks, chassis currently utilizing first generation Peoplenet Mobile Gateway (PMG001) will experience severe 3G service degradation as early as January of 2022. Chassis currently utilizing 3G antennas as a prim… - S006 Jan 10, 2022 · Service Bulletin/Repair Instructions
Non-Safety Campaign – Sun Visors are available. Parts will be shipped to dealers. - E282 Dec 17, 2021 · Service Bulletin/Repair Instructions
Information Only: Due to differences between the PACCAR MX-11 or MX-13 2021A and 2021B engines, technicians must be able to identify which of these engines are in a chassis. - S007 Nov 16, 2021 · Service Bulletin/Repair Instructions
Non-Safety Campaign - Convex mirrors are available. Parts will be shipped to dealers. - 43-071 Sep 21, 2021 · Service Bulletin/Repair Instructions
Fix-As-Fail – 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 op… - 02-168 Sep 20, 2021 · Service Bulletin/Repair Instructions
Information Only - Rear axle Quarter Fenders with less than two inches of clearance between the top of the quarter fender and the bottom of the trailer/equipment are susceptible to damage. The lack of clearance could result in cracked/broken quarter fenders… - 02-160 Feb 10, 2021 · Service Bulletin/Repair Instructions
Information Only – Windshield washer pumps have a high No Trouble Found rate. Washer pumps may fail to spray due to a clogged filter. - 26-037 Dec 18, 2020 · Service Bulletin/Repair Instructions
Fix-As-Fail - Prior versions of Eaton Endurant transmission software may be prone to setting Linear Clutch Actuator (LCA) fault codes leading to possible LCA hardware replacement. - 32-014 Oct 12, 2020 · Service Bulletin/Repair Instructions
Fix-As-Fail – The Battery Management System (BMS) may report the incorrect battery condition. Additional diagnostics are available to correctly determine and repair the root cause of the issue.
Source: NHTSA manufacturer communications files.