The worst 2026 Peterbilt 548 problems
Ranked by number of owner complaints. Mileage and cost come from what owners wrote.
Problems by type
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Recalls 4
Fuel system, diesel: delivery: hoses, lines/piping, and fittings
- What is wrong
- PACCAR Incorporated (PACCAR) is recalling certain 2022-2023 Kenworth T370, T270, 2022-2027 Kenworth T280, Peterbilt 548, 2023-2027 Kenworth T480, T380, Peterbilt 536, 537, and 2025 Peterbilt 567 vehicles. The remote fuel filter hoses may separate from the fitting, causing a fuel leak and an engine stall.
- Risk
- A fuel leak in the presence of an ignition source increases the risk of a fire. An engine stall increases the risk of a crash.
- Remedy
- Dealers will replace the fuel hoses, free of charge. Owner notification letters will be mailed beginning December 20, 2026. Owners may contact Peterbilt's customer service at 1‑940‑591‑4220 or Kenworth's customer service at 1‑425‑828‑5888. PACCAR's number for this recall is 26PACJ.
Recall number 26V700000 · 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
Service brakes, air: antilock: modulator
- What is wrong
- PACCAR Incorporated (PACCAR) is recalling certain 2024 Peterbilt 367, 2026 Peterbilt 548, 589, and 2024-2026 Peterbilt 567 trucks. The rear brake piping assembly may have insufficient clearance, which can result in a loss of service brakes or anti-lock brake function.
- Risk
- Brake failure can increase the risk of a crash.
- Remedy
- Dealers will install new brake hoses and correct the rear brake piping assembly, free of charge. Owner letters were mailed September 8, 2025. Owners may contact Peterbilt's customer service at 1‑940‑591‑4220. PACCAR's number for this recall is 25PBE.
Recall number 25V353000 · Recall details
Electrical system: instrument cluster/panel
- What is wrong
- PACCAR Incorporated (PACCAR) is recalling certain 2025 Kenworth T180, Peterbilt 535, 567, 2025-2026 Kenworth T280, 2023-2026 Kenworth T380, 2024-2026 Kenworth T480, 2024-2026 Peterbilt 536, 537, and 548 trucks. The exterior lighting switch may fail, resulting in the hazard lights and the instrument display back-light brightness adjustment not functioning. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard (FMVSS) numbers 101, "Control and Displays" and 108, "Lamps, Reflective Devices and Associated Equipment."
- Risk
- Inoperative hazard lights cannot alert other drivers as intended. In addition, the inability to adjust the brightness on the instrument panel display can make it difficult to see critical safety information or distract the driver. Both scenarios can increase the risk of a crash.
- Remedy
- Dealers will update the vehicle cab controller unit (VECU) software, free of charge. Owners are advised that a non-responsive switch can be temporarily reset by a key cycle. Owner notification letters were mailed March 26, 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 25KWB and 25PBB.
Recall number 25V041000 · Recall details
Technical service bulletins for the 2026 Peterbilt 548 20
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.
- There is an update to the CARB Base Emissions Warranty Limits table and Manufacturer’s Warranty Coverage...
- Eaton service bulletin TAIB-1026 instructs dealers to update the master switch module (MSM) software
- "Kenworth: Dealers should check the chassis list and SIR weekly for VIN changes
- Updated Sheppard Steering Gear Classification Tool link in Inspection Procedure
- An improved transmission bracket is now available for replacement on certain chassis equipped with a...
- "Kw & pb
- The repair procedure has been updated to include diagnostic steps.
- KW: A Transmission Control Module (TCM) software update is now available for certain T280, T380, T480,...
- Troubleshooting procedures for 2.1m cab power windows are now available.
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Questions about the 2026 Peterbilt 548
Is the 2026 Peterbilt 548 reliable?
Owners have filed 0 complaints about the 2026 Peterbilt 548.
What is the most common problem with the 2026 Peterbilt 548?
There are not enough complaints to tell.
How many recalls does the 2026 Peterbilt 548 have?
4 recalls, covering fuel system, diesel, exterior lighting and service brakes, air.
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