Controls: proportioning relay valveRecall 26V-567 · 2027 Peterbilt 548
PACCAR Incorporated recall 26V-567 covers 58 2027 Peterbilt 548 for a controls: proportioning relay valve problem, reported to NHTSA on September 1, 2026.
Source: NHTSA recall 26V567000 and manufacturer quarterly reports. Started by the manufacturer.
The problem
PACCAR Incorporated (PACCAR) is recalling certain 2027 Peterbilt 548 trucks. The front brake valve and hoses may be the incorrect size, which can delay the rear service brake application and release, as well as the trailer gladhand application times. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 121, "Air Brake Systems."
The risk
Delayed brake response time can increase the risk of a crash.
The fix
Dealers will replace the front brake valves and hoses, free of charge. Owner notification letters were mailed October 21, 2026. Owners may contact Peterbilt's customer service at 1-940-591-4220. PACCAR's number for this recall is 26PACF.
Recall repairs are free. Confirm whether this recall is open on your vehicle by entering its VIN at nhtsa.gov/recalls.
Vehicles in this recall
Built from January 30, 2026 to August 13, 2026. Not every vehicle in these model years is included; check by VIN.