2021 BMW Z4

The 2021 BMW Z4 has 5 recalls, the most serious being two separate fire risks: a starter relay that can corrode, overheat, and short circuit, and a fuel tank weld that can fail and allow gasoline to leak near an ignition source.

On the electrical side, the corroding starter relay and the broader starter assembly concern both point to the same fire risk under the hood, and prior repair attempts did not fully resolve the issue across all affected vehicles. The fuel tank recall, which applies to 2020-2021 model years, involves a weld joining the two halves of the tank that may not have been completed properly, leaving an opening through which fuel can escape and potentially ignite.

The remaining recalls cover two distinct safety areas. On the M40i trim, engine management software can cause a loss of brake boost during engine start, meaning the brake pedal becomes significantly harder to press and requires more force than usual to slow the vehicle, raising the risk of a crash. Full mechanical braking still functions, but the extra pedal effort required can catch a driver off guard in a moment when quick stopping is needed. There is also a seatbelt concern: the retractor in one or both belts may not function correctly in a crash, meaning the belt may not pull tight against the occupant and restrain them as intended, increasing the risk of injury.