Summary
The BMW Z4 has 16 recalls spanning 2003 through 2023, with the most serious recent issue affecting 2023 models where transmission oil can leak into the transmission control unit, causing the gears to seize and cutting drive power without warning.
On the 2023 model year there is also a software defect that allows windows and the sunroof to close without the key present in or near the vehicle, which can injure someone inside. Going back to 2019, two recalls stand out: the accelerator pedal can catch on a wiring harness and stick, causing unintended acceleration, and the steering tie rods can crack under heat and vibration and break entirely, resulting in a complete loss of steering. The 2019-2020 model years also have a headlamp alignment issue where the lights can be adjusted horizontally, creating glare for oncoming drivers or reducing visibility ahead.
The 2006 through 2013 model years share a recurring fire risk tied to the positive crankcase ventilation valve heater, which can short circuit and overheat. This can melt components and start a fire even when the vehicle is parked and off. On the 2009 model, a batch of vehicles built over a narrow production window has a faulty crimp connector in the seatbelt tensioner wiring, which can prevent the belt from tightening in a crash.
Earlier production covers several issues on 2003 and 2004 models. The 2004 model has a fuel pump that can vapor lock under certain temperature and altitude conditions, stalling the engine and preventing restart for up to 20 minutes. The same vapor lock issue affects 2003 models. The 2003 model year also has a tire mounting defect on vehicles with 18-inch wheels where the tire can be damaged at the rim and lose pressure or fail while driving, and a separate airbag concern where mismatched processor hardware can prevent both front airbags from deploying in a crash. A 2004 recall also covers the front passenger seat occupant detection mat, which can wear out and fail to correctly read whether a passenger is present.
