The worst 2026 Kenworth W990 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 2
Electrical system: instrument cluster/panel
- What is wrong
- PACCAR Incorporated (PACCAR) is recalling certain 2024-2026 Kenworth T680, T880, and W990 trucks. The 15-inch digital display may fail to display warning lights or vehicle speed. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard (FMVSS) numbers 101, "Controls and Displays" and 121, "Air Brake Systems."
- Risk
- An instrument panel display that does not show critical information, such as warning lights or vehicle speed, increases the risk of a crash.
- Remedy
- Dealers will update the vehicle display software, free of charge. Owner letters were mailed October 27, 2025. Owners may contact Kenworth's customer service at 1‑425‑828‑5888. PACCAR's number for this recall is 25PACG.
Recall number 25V569000 · Recall details
Exterior lighting: lighting control module: software
- What is wrong
- PACCAR Incorporated (PACCAR) is recalling certain 2024-2026 Kenworth T480, T680, T880, W990, Peterbilt 520, 536, 537, 548, 567, 579, 589, 2025 Kenworth T180, Peterbilt 535, 2025-2026 Kenworth T280, T380 and L770 vehicles. The tail brake light, upper and lower beam headlights, reverse light, and turn signal may not illuminate as intended. In addition, the lift axles, if lowered, may revert to a raised position, or oscillate up and down when the signal warning lights are activated. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard (FMVSS) number 108, "Lamps, Reflective Devices and Associated Equipment."
- Risk
- Delayed and unsteady headlights can result in insufficient illumination of the road, decreasing the driver's visibility and increasing the risk of a crash. In addition, an unexpected position change of the lift axles may increase the risk of injury.
- Remedy
- Dealers will update the VCU software, free of charge. Owner letters were mailed August 19, 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 number for this recall is 25PACF.
Recall number 25V436000 · Recall details
Technical service bulletins for the 2026 Kenworth W990 42
Bulletins tell dealers how to fix known problems. A warranty extension means the manufacturer pays for that repair for longer.
- The new 2.1m day cab lift tools, a Level 3 mandatory tool, are now available to order.
- Eaton service bulletin TAIB-1026 instructs dealers to update the master switch module (MSM) software
- The campaign expiration date has been extended from 01/01/2027 to 06/01/2027.
- Additional chassis have been added to the population
- Kenworth: Dealers should check the chassis list and SIR weekly for VIN changes
- An exhaust manifold slip joint seal kit is now available for EPA 2017-2024 PACCAR MX-13 engines.
- [SmartAir / KIMS] A/C systems may shut down prematurely when voltage levels drop below a certain threshold.
- KW: The chassis list has been updated to include 1 chassis
- This optional software update is expected to be available after 08/28/2026.
- PB: The chassis list has been updated to include 11 chassis
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Questions about the 2026 Kenworth W990
Is the 2026 Kenworth W990 reliable?
Owners have filed 0 complaints about the 2026 Kenworth W990.
What is the most common problem with the 2026 Kenworth W990?
There are not enough complaints to tell.
How many recalls does the 2026 Kenworth W990 have?
2 recalls, covering electrical system and exterior lighting.
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