Honda Canada is recalling 3400 vehicles sold by its upscale Acura division to fix collision avoidance systems that could unexpectedly apply emergency braking.

Like other manufacturers’ automatic braking setups, Acura’s collision mitigation braking system (CMBS) is designed to hit the brakes in situations where an inattentive driver fails to stopped traffic ahead of the car. The problem is CMBS could interpret roadside objects like guardrails and metal fences as obstacles and unnecessarily bring the car to a screeching halt, creating the obvious potential for a serious rear-end crash.

According to the U.S. National Highway Traffic Safety Administration (NHTSA), the software flaw at the root of this recall actually did cause two rear-enders in Japan, but there are no reported cases in North America.

Acura’s fix is to have dealers update the CMBS software in the affected 2014 and 2015 models.


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