2026 Peterbilt 579 Problems, Complaints & Recalls
- Compared with other 579 years
- Not enough data 11th of 22 for complaints
- Safety recalls
- 2 recalls: check your VIN
- NHTSA crash rating
- Not rated
Owners have filed 1 complaint with NHTSA about the 2026 Peterbilt 579. That ranks 11th out of 22 579 model years for complaints. The most reported problem area is service brakes (1 complaints, 100%), typically at around 200 miles. Complaints mention 1 injury. There are 2 safety recalls covering this model year.
- 1owner complaints
- 2safety recalls
- 0NHTSA investigations
- 0complaints mentioning a crash
Complaints are unverified owner reports and are not adjusted for sales volume.
Most common 2026 Peterbilt 579 problems
Complaints grouped by the part of the car owners reported, with the median mileage when the problem happened.
| Problem area | Complaints | Share | Median miles | Owners mention most | Typical repair cost |
|---|---|---|---|---|---|
| Service Brakes | 1 | 100% | 200 | — | — |
One complaint can list several problem areas, so shares can add up to more than 100%.
2026 Peterbilt 579 recalls (2)
Tap a recall to see the problem, the risk and the fix.
Service brakes, air:supply:quick release valve
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.
Exterior lighting:lighting control module:software
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.
To see whether a specific car still has an open recall, enter its VIN on NHTSA's official recall lookup. You can also decode a VIN here.
Recent owner reports
Short excerpts of the latest complaints filed with NHTSA, with personal details removed. Full reports can be searched on NHTSA.gov.
The contact was the operator of a 2026 Peterbilt 579 for an employer. The contact stated that whether driving 30 MPH or 65 MPH, after another vehicle entered the lane in front of the vehicle, the Forward Collision Avoidance: AEB and Lane Keep Assist systems erroneously activated and brought the…
Other Peterbilt 579 years
| Year | Complaints | Recalls |
|---|---|---|
| 2027 579 | 0 | 3 |
| 2026 | 1 | 2 |
| 2025 579 | 0 | 7 |
| 2024 579 | 3 | 7 |
| 2023 579 | 3 | 11 |
| 2022 579 | 7 | 15 |
| 2021 579 | 1 | 9 |
| 2020 579 | 5 | 6 |
| 2019 579 | 3 | 8 |
| 2018 579 | 7 | 14 |
| 2017 579 | 3 | 13 |
| 2016 579 | 3 | 11 |
| 2015 579 | 4 | 9 |
| 2014 579 | 2 | 12 |
| 2013 579 | 1 | 13 |
| 2012 579 | 0 | 6 |
| 2011 579 | 0 | 4 |
| 2010 579 | 0 | 3 |
| 2009 579 | 0 | 2 |
| 2008 579 | 0 | 2 |
| 2007 579 | 0 | 1 |
| 2006 579 | 0 | 1 |
See all Peterbilt 579 problems by year, every Peterbilt model, or the VIN decoder.
Similar Peterbilt models
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Frequently asked questions
What are the most common problems with the 2026 Peterbilt 579?
Owners most often report service brakes problems. The top one, service brakes, accounts for 1 complaint.
Was there a recall on the 2026 Peterbilt 579?
Yes, 2 safety recalls. Enter your VIN at NHTSA.gov to check whether the repairs were done on your car.
Was the 2026 Peterbilt 579 a good year?
Complaint data can't fully answer that, because counts aren't adjusted for sales. Compared with other 579 model years, the 2026 has too little data to compare. Always get a pre-purchase inspection and check the VIN for open recalls.