2026 Peterbilt 579 recalls and problems
The 2026 Peterbilt 579 has 2 safety recalls and 1 owner complaint filed with NHTSA. Recall repairs are free at any Peterbilt dealer.
Recalls may cover only some 2026 Peterbilt 579 vehicles. Check your VIN at NHTSA ↗ to see open recalls for your exact car.
2026 Peterbilt 579 recalls
Recall 26V-442: Service Brakes, Air
Problem: PACCAR Incorporated (PACCAR) is recalling certain 2026-2027 Peterbilt 579 and 2027 Kenworth T680 tractors. The trailer air connection quick release (QR) valve in the air brake system may have been incorrectly installed, which can cause the trailer to become unstable after the driver applies the brakes. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 121, "Air Brake Systems."
Risk: An incorrectly installed quick release valve that does not function properly can increase the risk of a crash.
Fix: Paccar inspected and reinstalled the valves, as necessary, free of charge. All affected tractors have been repaired and therefore no owner notification letters are necessary. Owners may contact Peterbilt's customer service at 1-940-591-4220 and Kenworth's customer service at 1-425-828-5888. PACCAR's number for this recall is 26PACC.
Recall 25V-436: Exterior Lighting
Problem: 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.
Fix: 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.
2026 Peterbilt 579 problems reported by owners
| Problem area | Reports | |
|---|---|---|
| Service Brakes | 1 |
Typical mileage at the time of the problem: 200 miles (median of owner reports).
Problems that are not covered by a recall are paid repairs; labor rates follow local mechanic pay — see what auto mechanics earn in each state.
Recent 2026 Peterbilt 579 complaints
Owner reports filed with NHTSA, as written (personal details removed). Complaints are not verified by NHTSA.
Other Peterbilt 579 years
Frequently asked questions
Does the 2026 Peterbilt 579 have any recalls?
Yes — NHTSA lists 2 recalls for the 2026 Peterbilt 579: 26V-442 (service brakes, air), 25V-436 (exterior lighting). Not every vehicle is affected, so check your VIN at nhtsa.gov/recalls.
What is the most common problem with the 2026 Peterbilt 579?
Owners report service brakes problems most often (1 reports). The typical mileage when problems were reported is about 200 miles.
Are Peterbilt recall repairs free?
Yes. Safety recall repairs are free at authorized Peterbilt dealers, whether you are the first owner or bought the car used.