The worst 2023 Kenworth T800B problems
Ranked by number of owner complaints. Mileage and cost come from what owners wrote.
Problems by type
Tap a problem to see which part fails, at what mileage and in which other years.
Recalls 5
Electrical system: software
- What is wrong
- 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.
- 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.
Recall number 24V915000 · Recall details
Seat belts
- What is wrong
- PACCAR Incorporated (PACCAR) is recalling certain 2020 Kenworth T660, 2018-2024 Kenworth T800 and W900 vehicles. An additional spacer may have been added to the joint that connects the seat to the seat belt tether and buckle, causing an unsecured connection.
- Risk
- An unsecured seat belt connection may not properly restrain an occupant during a crash, increasing their risk of injury.
- Remedy
- Dealers will inspect and remove the additional spacer and replace the bolt, as necessary, free of charge. Owner letters were mailed March 20, 2024. Owners may contact PACCAR's customer service at 1‑425‑828‑5888. PACCAR's number for this recall is 23KWK.
Recall number 23V717000 · Recall details
Steering: linkages: tie rod assembly
- What is wrong
- PACCAR Incorporated (PACCAR) is recalling certain 2023 Peterbilt 348, 367, 389, 548, 567, and Kenworth T370, T480, T800, T800B, T880, W900B, and W990 vehicles. The tie rod clamps may have been improperly heat-treated, causing them to fail and allowing the tie rods to separate.
- Risk
- Tie rod separation can result in a sudden loss of steering, increasing the risk of a crash.
- Remedy
- Dealers will replace both tie rod clamps, free of charge. Owner notification letters are expected to be mailed December 16, 2022. 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 22PBJ and 22KWJ.
Recall number 22V782000 · Recall details
Engine and engine cooling: engine: engine control module (ecu/ECM)
- What is wrong
- PACCAR Incorporated (PACCAR) is recalling certain 2023 Peterbilt 220, 389, 520, 536, 537, 348, 367, 567, 548, 579, and 2023 Kenworth T680, K270, T440, T880, W990, K370, T280, T380, T480, T800, and W900 vehicles. The engine control module (ECM) may experience an internal electrical short-circuit, causing the engine to stall.
- Risk
- An unexpected engine stall can increase the risk of a crash.
- Remedy
- Dealers will replace the ECM, free of charge. Owner notification letters are expected to be mailed October 16, 2022. Owners may contact Kenworth's customer service at 1‑425‑828‑5888 and Peterbilt's customer service at 1‑940‑591‑4220. PACCAR's number for this recall is 22KWG and 22PBG.
Recall number 22V631000 · Recall details
Steering
- What is wrong
- PACCAR Incorporated (PACCAR) is recalling certain 2022-2023 Kenworth T170, T270, T280, T370, T380, T440, T470, T480, T680, T800, T880, W900, W990, C500, and 2022-2023 Peterbilt 325, 330, 337, 348, 365, 367, 389, 520, 536, 537, 548, 567, and 579 vehicles. The steering gears may have been assembled incorrectly, which can cause the gears to fracture.
- Risk
- A fractured steering gear can cause a loss of steering control, increasing the risk of a crash.
- Remedy
- Dealers will inspect the steering gear serial numbers, and replace the steering gears as necessary, free of charge. Owner notification letters were mailed September 26, 2022. 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 22PBE and 22KWE.
Recall number 22V547000 · Recall details
Technical service bulletins for the 2023 Kenworth T800B 19
Bulletins tell dealers how to fix known problems. A warranty extension means the manufacturer pays for that repair for longer.
- Due to supplier constraints, an authorized aftermarket surge tank has been made available.
- Kenworth: Dealers should check the chassis list and SIR weekly for VIN changes
- The verbiage in the Introduction section has been updated.
- (KW) Certain T680 / T800 / T880 / W900 / W990 have updated GHG labels available for order and installation.
- The attached procedures document has been updated with more detail and explanations
- Bogie Crossmember Torque Value Update
- Procedure pictures updated for clarity
- Certain C500/T440/T470/T660/T680/T800/T880/W900 chassis may have air tank reservoirs that do not meet air...
- Safety Recall Repair parts and procedures are now available
- Safety Recall Interim Notification On certain Kenworth model year 2018 through 2024 C500/T660/T800/W900...
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Questions about the 2023 Kenworth T800B
Is the 2023 Kenworth T800B reliable?
Owners have filed 0 complaints about the 2023 Kenworth T800B.
What is the most common problem with the 2023 Kenworth T800B?
There are not enough complaints to tell.
How many recalls does the 2023 Kenworth T800B have?
5 recalls, covering electrical system, seat belts and steering.
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