2021 BMW X3 Fuel system Problems

“Our car has just shutdown altogether waiting at a traffic light. Also, the main console above the steering wheel has gone completely black several times while driving.”

“The contact owns a 2021 BMW X3. The contact stated that upon refueling the vehicle and attempting to start the vehicle, the vehicle failed to start on several occasions. The contact stated that the vehicle was able to restart after several attempts. The vehicle was taken to Auto Zone, where DTC: P0172 and P0446 were retrieved. The contact related the failure to BMW TSB Number: SIB 01 02 24. An independent mechanic advised the contact to only fill the fuel tank to half full. The vehicle was not diagnosed or repaired. …”

“I'm reporting a safety issue with BMW vehicles equipped with the B58TU engine, primarily 2019-2021 models. These vehicles have an oil pump with an internal plastic component that regulates oil pressure, and this part is fracturing in the field, causing sudden loss of oil pressure. The failure typically occurs during cold starts in low temperatures. When it fails, oil pressure becomes erratic or is lost entirely, often with little to no warning before engine damage or vehicle disablement. …”

“The oil pump failed and needs to be replaced. Yes it is available for inspection. If the pump does not get replaced, the oil will not flow through the car like it's supposed to and the engine could seize up and stop working. My dealership confirmed that the oil pump has failed. Another service center mentioned that it's a common problem with certain BMWs because of the plastic component that they used. Because of the issues, BMW switched to metal but never issued a recall to fix those who still have the plastic component. …”

“This technical failure in the BMW B58TU engine (2019–2021) involves the variable-displacement oil pump's internal thermoplastic slide. In low ambient temperatures, the high viscosity of cold oil creates mechanical stress that causes this plastic component to fracture. ​ The Safety Hazard ​The primary risk is a sudden loss of motive power. When the slide fails, oil pressure becomes unregulated or drops entirely, triggering an immediate Drivetrain Malfunction or engine shutdown. ​ Immobilization: Vehicles may stall in active traffic or high-speed environments without sufficient warning. …”