2026-2027 Peterbilt 579, 2027 Kenworth T680 recall: Incorrectly Installed Quick Release Valve/FMVSS 121
Report received by NHTSA: July 8, 2026.
Built by the Tribune's code from NHTSA's official records. No AI wrote this page. Updated Nov. 4, 2026.
- What's recalled
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."
- The risk
An incorrectly installed quick release valve that does not function properly can increase the risk of a crash.
- Who's affected
8 vehicles potentially affected, according to NHTSA. Models: 2026-2027 Peterbilt 579, 2027 Kenworth T680.
- Compared with
PACCAR Incorporated has 7 NHTSA recalls in 2026 so far, compared with 8 in all of 2025.
Counted by the Tribune from NHTSA's records since Nov. 1, 2016.
- Before this
95 earlier NHTSA recalls by PACCAR Incorporated since Nov. 1, 2016; the 5 most recent:
- Jan. 19, 2026 PACCAR Incorporated recall: Steering Cross-Shaft May Fail (agency record)
- Nov. 17, 2025 PACCAR Incorporated recall: Insufficient Air Volume in Brake System /FMVSS 121 (agency record)
- Sept. 2, 2025 PACCAR Incorporated recall: Instrument Panel Display Failure/FMVSS 101 & 121 (agency record)
- June 26, 2025 PACCAR Incorporated recall: Insufficient Illumination from Lights/FMVSS 108 (agency record)
- May 28, 2025 PACCAR Incorporated recall: Service Brakes May Fail (agency record)
Counted by the Tribune from NHTSA's records since Nov. 1, 2016.
- What to do and when
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.
NHTSA's record, word for word
- Check it yourself
NHTSA's VIN lookup shows whether a specific vehicle has an open recall.
Models in this recall
- Kenworth T680 2027
- Peterbilt 579 2026-2027
The record as NHTSA published it
| NHTSA recall number | 26V442000 |
|---|---|
| Manufacturer | PACCAR Incorporated |
| Recall type | Vehicle |
| Component | SERVICE BRAKES, AIR |
| Report received by NHTSA | July 8, 2026 |
| Potentially affected | 8 vehicles |
| Manufacturer's recall number | 26PACC |
| “Do not drive” warning | No |
| Fire risk when parked (“park outside”) | No |
Source: National Highway Traffic Safety Administration recall records (public domain). NHTSA's record