2021 Kenworth T440 Problems, Complaints & Recalls
- Compared with other T440 years
- Not enough data 1st of 14 for complaints
- Safety recalls
- 4 recalls: check your VIN
- NHTSA crash rating
- Not rated
Owners have filed 1 complaint with NHTSA about the 2021 Kenworth T440. That is the most of any T440 model year in the database (14 years). The most reported problem area is service brakes (1 complaints, 100%). There are 4 safety recalls covering this model year.
- 1owner complaints
- 4safety recalls
- 0NHTSA investigations
- 0complaints mentioning a crash
Complaints are unverified owner reports and are not adjusted for sales volume.
Most common 2021 Kenworth T440 problems
Complaints grouped by the part of the car owners reported, with the median mileage when the problem happened.
| Problem area | Complaints | Share | Median miles | Owners mention most | Typical repair cost |
|---|---|---|---|---|---|
| Service Brakes | 1 | 100% | — | — | — |
One complaint can list several problem areas, so shares can add up to more than 100%.
2021 Kenworth T440 recalls (4)
Tap a recall to see the problem, the risk and the fix.
Service brakes, hydraulic:antilock/traction control/electronic limited slip:control unit/module; electrical system:software
Problem: 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.
Risk: 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.
Fix: 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.
Service brakes, air:supply:reservoir/tank
Problem: PACCAR Incorporated (PACCAR) is recalling certain 2009-2021 Kenworth C500, 2012-2021 Kenworth T440, 2009-2015 Kenworth T660, 2015-2024 Kenworth T680, 2009-2024 Kenworth T800, 2009-2020 Kenworth T370, 2014-2023 Kenworth T880, 2011-2016 Kenworth T470, 2023 Kenworth T480, and 2009-2019 Kenworth W900 vehicles. The air tanks have an insufficient volume of air for the brake system. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 121, "Air Brake Systems."
Risk: Insufficient air volume can reduce braking performance and increase the risk of a crash.
Fix: Dealers will install the correct volume air tanks, free of charge. Owner notification letters were mailed August 12, 2024. Additional owner notification letters were mailed October 27, 2025. Owners may contact PACCAR customer service at 1-425-828-5888. PACCAR's number for this recall is 24KWD.
Fuel system, diesel:delivery:hoses, lines/piping, and fittings
Problem: PACCAR Incorporated (PACCAR) is recalling certain 2021-2022 Peterbilt 536, 537, 548 and Kenworth T270, T280, T370, T380, T440, T470, and T480 vehicles equipped with Cummins L9 diesel engines. A fuel leak may occur from the fuel hose between the fuel pump and the remote fuel filter head.
Risk: A fuel leak in the presence of an ignition source increases the risk of a fire.
Fix: Cummins will replace the fuel hoses, free of charge. Owner notification letters are expected to be mailed in October 2021. Owners may contact PACCAR's customer service at 1-425-828-5888 (Kenworth) and 1-940-591-4220 (Peterbilt). PACCAR's numbers for this recall are 21PBG and 21KWF.
Fuel system, diesel:fuel injection system:fuel rail
Problem: PACCAR Incorporated (PACCAR) is recalling certain 2018-2021 Peterbilt 337, 348, 365, 367, 520, 567, Kenworth T270, T370, T440, T470, T800 and T880 vehicles. The sealing washer may not seat correctly in the pilot bore holes, allowing the high pressure fuel rail assembly to leak.
Risk: A fuel leak in the presence of an ignition source increases the risk of a fire.
Fix: Dealers will inspect the rail threads and fuel lines, and replace the rail as necessary, free of charge. Owners may contact PACCAR customer service at 1-425-828-5888 (Kenworth) or 1-940-591-4220 (Peterbilt). PACCAR's numbers for this recall are 21KWC and 21PBD.
To see whether a specific car still has an open recall, enter its VIN on NHTSA's official recall lookup. You can also decode a VIN here.
Recent owner reports
Short excerpts of the latest complaints filed with NHTSA, with personal details removed. Full reports can be searched on NHTSA.gov.
While driving the factory floor mat can slide under the rear of the brake pedal while it is being applied. Once pedal is released it will still hold brake pressure causing brakes to remain engaged while still allowing vehicle to move down the road in turn causing brakes to heat up and either…
Other Kenworth T440 years
| Year | Complaints | Recalls |
|---|---|---|
| 2023 T440 | 0 | 3 |
| 2022 T440 | 0 | 4 |
| 2021 | 1 | 4 |
| 2020 T440 | 0 | 4 |
| 2019 T440 | 0 | 5 |
| 2018 T440 | 0 | 5 |
| 2017 T440 | 0 | 2 |
| 2016 T440 | 0 | 6 |
| 2015 T440 | 0 | 7 |
| 2014 T440 | 0 | 9 |
| 2013 T440 | 0 | 7 |
| 2012 T440 | 0 | 9 |
| 2011 T440 | 0 | 7 |
| 2010 T440 | 0 | 1 |
See all Kenworth T440 problems by year, every Kenworth model, or the VIN decoder.
Similar Kenworth models
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Frequently asked questions
What are the most common problems with the 2021 Kenworth T440?
Owners most often report service brakes problems. The top one, service brakes, accounts for 1 complaint.
Was there a recall on the 2021 Kenworth T440?
Yes, 4 safety recalls. Enter your VIN at NHTSA.gov to check whether the repairs were done on your car.
Was the 2021 Kenworth T440 a good year?
Complaint data can't fully answer that, because counts aren't adjusted for sales. Compared with other T440 model years, the 2021 has too little data to compare. Always get a pre-purchase inspection and check the VIN for open recalls.