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NHTSA Campaign 26V442000

SERVICE BRAKES, AIR:SUPPLY:QUICK RELEASE VALVE

Issued by PACCAR Incorporated · Reported Jul 8, 2026 · 8 vehicles affected

What's wrong

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."

Consequence

An incorrectly installed quick release valve that does not function properly can increase the risk of a crash.

Remedy

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.

Vehicles affected by this recall

Make Model Year Units
KENWORTH T680 2027 8
PETERBILT 579 2026 8
PETERBILT 579 2027 8

Source: NHTSA Campaign 26V442000 on nhtsa.gov. To check the current repair status for a specific vehicle, use our free VIN decoder.