repaired · 2026 Q3
Electrical system: software
Risk. Safety systems that depend on the ECU (Automatic Traction Control, ABS, Electronic Stability Control, Active Cruise Control, and Collison Mitigation System)…
2021 Kenworth T440Problems, recalls & complaints
NHTSA has logged 1 owner complaint about the 2021 Kenworth T440, most often about the service brakes. It is covered by 4 safety recalls, and for recall 24V-145 the manufacturer reports only 24% of affected cars repaired.
Source: NHTSA complaints, recalls, investigations and manufacturer recall reports, through December 9, 2024. Updated daily.
Complaints by system
Where the 2021 Kenworth T440 has problems
1 complaint grouped by the system owners reported.
1Service brakes
| System | Complaints | Crash, fire or injury |
|---|---|---|
| Service brakes | 1 | 0 |
Source: NHTSA Office of Defects Investigation. Complaints are submitted by the public and are not verified by NHTSA.
4 recalls
2021 Kenworth T440 recalls and how many were fixed
Each ring shows the share of affected cars repaired, from the manufacturer’s latest quarterly report to NHTSA. Recall repairs are free at authorized dealers.
repaired · 2026 Q2
Supply: reservoir/tank
Risk. Insufficient air volume can reduce braking performance and increase the risk of a crash.
repaired · 2023 Q2
Delivery: hoses, lines/piping, and fittings
Risk. A fuel leak in the presence of an ignition source increases the risk of a fire.
repaired · 2023 Q2
Fuel injection system: fuel rail
Risk. A fuel leak in the presence of an ignition source increases the risk of a fire.
Recalls apply to specific cars. To see whether a recall is still open on yours, enter the 17-character VIN at nhtsa.gov/recalls or with Kenworth.
Best & worst years
2021 vs. every other T440 year
Bars show complaints per model year. Colors show the CarFlaw verdict: complaints weighted for crashes, fires and injuries, adjusted for years on the road and compared with the T440 median. How we score
'10'11'12'13'14'15'16'17'18'19'20'21'22'23
- Avoid
- Caution
- Solid
- Best
- Not rated
In owners' words
What T440 owners report
Recent service brakes complaints filed with NHTSA, shortened. Personal details are removed.
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…
Own a 2021 T440?
Decode your VIN to see the recalls for your exact car, then confirm open recalls with NHTSA.