Ehaust ' brackets attaching the exhaust pipes to cab have rubber bushings that disintegrate quickly, within a couple of months leaving the pipes hanging with possibility of falling into the roadways and causing accidents. Part number: m11-1917-004. On new (2018) vehicles they have been changed more than once. Several vehicles in fleet with same issue.
The worst 2018 Kenworth T800 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 11
Service brakes, air: supply: reservoir/tank
- What is wrong
- 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.
- Remedy
- 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.
Recall number 24V145000 · 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: critical fasteners
- What is wrong
- PACCAR Incorporated (PACCAR) is recalling certain 2018-2020 Kenworth T270, T370, T440, T470, T660, T680, T880, T800, W900, W990; and 2018-2020 Peterbilt 330, 337, 348, 365, 367, 389, 520, 567, and 579 vehicles. The Dana D-Series axle steer arm fasteners that attach the steering arm to the steering knuckle may fail.
- Risk
- Fastener failure can result in a loss of steering control, increasing the risk of a crash or injury.
- Remedy
- Dealers will replace and torque the steer arm fasteners, at no charge. Owner notification letters were mailed November 8, 2022. Owners may contact Kenworth customer service at 1‑425‑828‑5888 and Peterbilt customer service at 1‑940‑591‑4220. PACCAR's numbers for this recall are 22 PBB and 22 KWB.
Recall number 22V277000 · Recall details
Fuel system, diesel: fuel injection system: fuel rail
- What is wrong
- 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.
- Remedy
- 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.
Recall number 21V391000 · Recall details
Electronic stability control (ESC)
- What is wrong
- PACCAR Incorporated (PACCAR) is recalling certain 2008-2019 Peterbilt 330, 335, 337, 340, 348, 365, 367, 384, 386, 387, 388, 389, 567, 579 and 587 vehicles and 2008-2020 Kenworth T170, T270, T370, T660, T680, T800, T880, and W900 vehicles equipped with NAMUX Software. In the event that the Anti-lock Brake System (ABS) loses battery and/or ignition power to the controller, the dash warning light for the ABS may not illuminate to warn the driver of the loss of ABS. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard (FMVSS) number 121, "Air Brake Systems," and 136, "Electronic Stability Control System on Heavy Vehicles."
- Risk
- If the driver unknowingly operates the vehicle without the ABS functioning, there would be an increased risk of a crash.
- Remedy
- PACCAR will notify owners, and dealers will update the NAMUX software within the cab control module, free of charge. PACCAR issued owners an interim notification on June 4, 2020. The recall began May 26, 2020. Owners may contact Kenworth customer service at 1‑425‑828‑5888 or Peterbilt customer service at 1‑940‑591‑4220. PACCAR's number for this recall is 20pbc AND 20KWB.
Recall number 20V199000 · Recall details
Power train: clutch assembly
- What is wrong
- PACCAR Incorporated (PACCAR) is recalling certain 2018-2019 Peterbilt 337, 348, 365, 367, 389, 567, 579 and 587 trucks and 2018-2019 Kenworth C500, T270, T370, T440, T660, T680, T800, T880 and W900 trucks equipped with automated manual transmissions. An internal component in the clutch assembly may fail, possibly resulting in unintended vehicle movement.
- Risk
- Unintended movement of a vehicle can increase the risk of a crash.
- Remedy
- PACCAR will notify owners, and dealers will update the transmission control module, free of charge. The recall began February 23, 2019. Owners may contact PACCAR customer service at 1‑940‑591‑4220. PACCAR's numbers for this recall are 18PBE and 18KWH.
Recall number 18V931000 · Recall details
Engine and engine cooling: engine: diesel
- What is wrong
- PACCAR Incorporated (PACCAR) is recalling certain 2017-2019 Kenworth C500, T600, T660, T680, T800, T880 and W900 trucks, as well as Peterbilt 367, 386, 389, 567, 579 and 587 trucks, equipped with Cummins ISX15 or X15 diesel engines. In certain driving conditions, such as on a long down-hill grade, the fuel line may burst if the fuel pump cooling circuit screen becomes restricted.
- Risk
- If the fuel line bursts, fuel may leak onto the road resulting in a roadway hazard for other motorists. The engine may also stall without warning, resulting in the vehicle's inability to restart, increasing the risk of a crash.
- Remedy
- Cummins will notify owners, and dealers will replace the suspect fuel pump cooling circuit screen, free of charge. The recall began November 21, 2018. Owners may contact PACCAR customer service at 1‑940‑591‑4220. PACCAR's number for this recall is 18E081.
Recall number 18V657000 · Recall details
Electrical system: wiring
- What is wrong
- PACCAR Incorporated (PACCAR) is recalling certain 2016-2019 Kenworth C500, T660, T800, and W900 vehicles, equipped with 1.9M ISX15 engines. The engine harnesses may have been manufactured without check engine light (CEL) and stop engine light (SEL) circuits, preventing the driver from being warned of a serious engine problem.
- Risk
- If the driver is not warned of a serious engine problem, the engine may unexpectedly fail, increasing the risk of a crash.
- Remedy
- PACCAR will notify owners, and dealers will inspect or test the ISX15 engine harness, and install an overlay jumper harness to supply the missing CEL and SEL circuits, free of charge. The recall began November 30, 2018. Owners may contact PACCAR customer service at 1‑918‑259‑3258. PACCAR's number for this recall is 18KWE.
Recall number 18V555000 · Recall details
Electronic stability control (ESC)
- What is wrong
- PACCAR Incorporated (PACCAR) is recalling certain 2017-2018 Peterbilt 567 and 579 trucks and 2015-2018 Kenworth T660, T680, T800, T880 and W900 trucks. In the event that the Anti-lock Brake System (ABS) loses battery and/or ignition power to the controller, the dash warning light for the ABS may not illuminate to warn the driver of the loss of ABS. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard (FMVSS) number 121, "Air Brake Systems," and 136, "Electronic Stability Control System on Heavy Vehicles."
- Risk
- If the driver unknowingly operates the vehicle without the ABS functioning, there would be an increased risk of a crash.
- Remedy
- PACCAR will notify owners, and dealers will update the NAMUX software within the cab control module, free of charge. PACCAR issued owners an interim notification on July 30, 2018. Owners may contact Peterbilt customer service at 1‑918‑259‑3258 or Kenworth customer service at 1‑425‑828‑5000.
Recall number 18V368000 · Recall details
Fuel system, diesel
- What is wrong
- PACCAR Incorporated (PACCAR) is recalling certain 2017-2018 Peterbilt 367, 389, 567, 579 and 587 trucks, and 2018 Kenworth C500, T680, T800, T880 and W900 trucks equipped with Cummins ISX 15L engines. These engines have a fuel pump whose drive gear could possibly slip on its drive shaft, causing a fuel pump function loss, resulting in an engine stall.
- Risk
- An engine stall can increase the risk of a crash.
- Remedy
- Cummins will notify the vehicle purchaser, and Cummins dealers will replace the fuel pumps, free of charge. The recall began July 1, 2017. Owners may contact Cummins customer service at 1‑800‑286‑6467 or PACCAR customer service at 1‑425‑468‑7400. PACCAR's number for this recall is C1909.
Recall number 17V443000 · Recall details
Service brakes, air
- What is wrong
- PACCAR Incorporated (PACCAR) is recalling certain 2012-2018 Kenworth T800 and T880 vehicles equipped with Neway ADZ tridem rear suspensions. The brake control airline may be the incorrect size, resulting in an imbalance in the service brake application timing. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard (FMVSS) number 121, "Air brake systems."
- Risk
- An incorrectly sized airline may lengthen the distance needed to stop the vehicle, increasing the risk of a crash.
- Remedy
- Kenworth will notify owners, and dealers will modify the air brake system with updated brake piping, free of charge. The recall began on June 21, 2017. Owners may contact Kenworth customer service at 1‑425‑828‑5000. PACCAR's number for this recall is 17KWB.
Recall number 17V322000 · Recall details
Technical service bulletins for the 2018 Kenworth T800 40
Bulletins tell dealers how to fix known problems. A warranty extension means the manufacturer pays for that repair for longer.
- Replaced obsolete SRT codes with updated SRT codes.
- 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 Condition, Chassis Affected, Service Action, Warranty, and Procedure sections have been updated to...
- The PACCAR Powertrain Prognostics Webcast video link has been removed
- Kenworth
- The attached procedures document has been updated with more detail and explanations
- Bogie Crossmember Torque Value Update
- CARB Chassis Update
- Procedure pictures updated for clarity
What 2018 Kenworth T800 owners say
Most recent owner complaints, unedited.
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Questions about the 2018 Kenworth T800
Is the 2018 Kenworth T800 reliable?
Owners have filed 1 complaint about the 2018 Kenworth T800, close to a typical T800 model year.
What is the most common problem with the 2018 Kenworth T800?
There are not enough complaints to tell.
How many recalls does the 2018 Kenworth T800 have?
11 recalls, covering service brakes, air, seat belts and steering.
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