ZF North America Brake Chamber: Service brakes — chamber

Affects ZF North America Brake Chamber · — — about 2K vehicles.

The hazard

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.

What to do

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.

Critical — crash/injury risk now High — injury risk; see remedy Moderate — fix at next service Low — minor / informational