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2021 Kenworth T800bProblems, recalls & complaints

NHTSA has logged 0 owner complaints about the 2021 Kenworth T800b. It is covered by 5 safety recalls, and for recall 23V-717 the manufacturer reports only 38% of affected cars repaired.

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CarFlaw IndexNot enough dataHigher is better (0–100)
Safety recalls5Lowest repair rate 38%Owner complaints00 with a crash, fire or injuryTop problem0—

Source: NHTSA complaints, recalls, investigations and manufacturer recall reports, through December 9, 2024. Updated daily.

Complaints by system

Where the 2021 Kenworth T800b has problems

0 complaints grouped by the system owners reported.

Box size = number of complaints naming that system. Darker = larger share. One complaint can name more than one system.
Complaints by system
SystemComplaintsCrash, fire or injury

Source: NHTSA Office of Defects Investigation. Complaints are submitted by the public and are not verified by NHTSA.

5 recalls

2021 Kenworth T800b 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.

76%repaired · 2026 Q3

Electrical system: software

Recall 24V-915 · Dec 9, 2024 · 220,764 vehicles · 168,017 repaired

Risk. Safety systems that depend on the ECU (Automatic Traction Control, ABS, Electronic Stability Control, Active Cruise Control, and Collison Mitigation System)…

Problem, fix and repair progress →

38%repaired · 2025 Q4

Seat belts

Recall 23V-717 · Oct 26, 2023 · 3,841 vehicles · 1,460 repaired

Risk. An unsecured seat belt connection may not properly restrain an occupant during a crash, increasing their risk of injury.

Problem, fix and repair progress →

45%repaired · 2023 Q2

Fuel injection system: fuel rail

Recall 21V-391 · May 26, 2021 · 612 vehicles · 275 repaired

Risk. A fuel leak in the presence of an ignition source increases the risk of a fire.

Problem, fix and repair progress →

100%repaired · 2022 Q4

Engine

Recall 21V-080 · Feb 17, 2021 · 132 vehicles · 132 repaired

Risk. A detached flywheel can cause loss of drive power, increasing the risk of a crash.

Problem, fix and repair progress →

Show 1 more recall
96%repaired · 2022 Q2

Power train: axle assembly

Recall 20V-506 · Aug 26, 2020 · 1,097 vehicles · 1,051 repaired

Risk. The short screws can cause the hardware to separate from the suspension system and become road hazards, increasing the risk of a crash and/or injury.

Problem, fix and repair progress →

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 T800b 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 T800b median. How we score

'96'00'21'22'23'24'25
  • Avoid
  • Caution
  • Solid
  • Best
  • Not rated

Own a 2021 T800b?

Decode your VIN to see the recalls for your exact car, then confirm open recalls with NHTSA.