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NHTSA Campaign 25E027000

SERVICE BRAKES, AIR:DISC:CHAMBER

Issued by Nova Bus (US) Inc. · Reported Apr 14, 2025 · 2,090 vehicles affected

What's wrong

Nova Bus (US) Inc. (Nova Bus) is recalling certain ZF North America Knorr-Bresme 20/22-57 brake chambers, with part number K038830N00, sold as replacement parts for certain buses. The brake chamber may have been improperly manufactured, which can result in an air leak.

Consequence

A brake chamber air leak may cause the brakes to engage unexpectedly, which can overheat the brakes and increase the risk of a fire. Additionally, unexpected braking can increase the risk of a crash.

Remedy

Nova Bus will replace the brake chambers, free of charge. Owner notification letters were mailed August 21, 2025. Owners may contact Nova Bus customer service at 1-450-472-6410. Nova Bus's number for this recall is CR5720.

Vehicles affected by this recall

Make Model Year Units
ZF NORTH AMERICA BRAKE CHAMBER 2,090

Source: NHTSA Campaign 25E027000 on nhtsa.gov. To check the current repair status for a specific vehicle, use our free VIN decoder.