Missing r12 relay valve/fmvss 121
Defect Summary
Paccar incorporated (paccar) is recalling certain 2020 kenworth t370 long wheelbase vehicles with larger rear axle spacing. the vehicles may be missing a second r12 relay valve, causing increased brake activation timing. as such, these vehicles fail to comply with the requirements of federal motor vehicle safety standard (fmvss) number 121, "air brake systems."
Safety Consequence
Increased brake activation timing may lengthen vehicle stopping distance, increasing the risk of a crash.
Corrective Action
Paccar will notify owners, and kenworth dealers will install a second r12 relay valve, free of charge. paccar issued owners an interim notification on april 14, 2020. the recall began may 6, 2020. owners may contact kenworth customer service at 1-425-828-5888. paccar's number for this recall is 20kwa.
Similar Recalls
Other recalls from Paccar Incorporated or involving Service Brakes, Hydraulic.
FAQ: Recall 20V086000
Your rights, the repair process, and what each field on this page means.
What is recall 20V086000?
NHTSA recall 20V086000 was issued by Paccar Incorporated on February 14, 2020. It addresses: Missing r12 relay valve/fmvss 121. The recall affects approximately 4 vehicles, with the defect involving the Service Brakes, Hydraulic component.
How do I get this recall repaired?
Contact any authorized Paccar Incorporated dealer and reference NHTSA recall ID 20V086000 or the manufacturer campaign number 20KWA. Under federal law, the repair is completely free regardless of vehicle age or owner history.
Is my vehicle included in this recall?
The only way to confirm is to look up your 17-character VIN at nhtsa.gov/recalls. NHTSA's tool will tell you if VIN-by-VIN this exact recall applies.
How long do I have to get a recall repair done?
There is no expiration on most federal safety recalls. Even if your vehicle is years old and you bought it used, the manufacturer is required to perform the repair at no cost.
Where does the data on this page come from?
All information on this page is sourced directly from the U.S. Department of Transportation public dataset for NHTSA recalls. Last refreshed: 2026-05-22. For the most current official notice, visit nhtsa.gov/recalls.