Canada2026–2027 Mack ANTHEM and PIONEER trucks are affected; they can be identified by model and model years 2026–2027. The rear brake modulator connector(s) may lack proper wiring protection, which could short circuit and cause a loss of antilock braking system (ABS) and electronic stability control (ESC), increasing crash risk. Mack will notify owners by mail and advise taking the truck to a dealership to inspect and, if necessary, replace the rear brake modulator(s); the dealer will also install a cover on the connector(s).
How to identify it
2026–2027 Mack ANTHEM
2026–2027 Mack PIONEER
The hazard
On certain trucks, the connector(s) for the rear brake modulator(s) may not have proper wiring protection. As a result, the rear brake modulator(s) could short circuit and cause a loss of antilock braking system (ABS) and electronic stability control (ESC).
A loss of ABS and ESC could increase the risk of a crash.
What to do
Mack will notify owners by mail and advise you to take your truck to a dealership to inspect and, if necessary, replace the rear brake modulator(s). The dealer will also install a cover on the connector(s).
The official notice
This page is a summary of the notice published by Transport Canada, collected from Health Canada, CFIA and Transport Canada. Check the original before you act on it.
Read the official notice (opens in a new tab)