BMW 5 Series, X4 +4 more: Brakes

Affects BMW 5 Series, X4, 3 Series, 7 Series, Z4, X3 · 2020–2022 — about 4K vehicles.

The hazard

Issue: On certain vehicles, a software problem could cause the vacuum pump to be damaged during engine starting. If this happens, there could be a loss of brake assist. This can cause an increase in brake pedal effort and increase the distance needed to stop the vehicle. Safety Risk: A sudden increase in brake pedal force could lead to an increased stopping distance. This could increase the risk of a crash. Corrective Actions: BMW will notify owners by mail and instruct you to take your vehicle to a dealer to update the engine management software.

What to do

Contact your dealer; the remedy details were not included in the filing.

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