I am reporting a safety concern involving BMW vehicles equipped with the B58 Technical Update (B58TU) engine, commonly found in model years 2019–2021. These vehicles utilize a variable-displacement engine oil pump containing an internal thermoplastic adjusting component responsible for regulating oil pressure. Field failures are increasingly being reported in which this internal component fractures, resulting in sudden loss or instability of engine oil pressure. The failure frequently occurs during cold-start operation in low ambient temperatures. When the component fails, oil pressure regulation becomes erratic or is lost entirely. In many cases, drivers receive little or no actionable warning prior to engine damage or vehicle disablement. Reported precursor symptoms include inability to electronically measure engine oil level, abnormal oil pressure behavior, or sudden drivetrain malfunction warnings. Failures may rapidly progress to engine shutdown or severe mechanical damage caused by oil starvation. Loss of lubrication can cause the vehicle to become disabled without warning while driving or shortly after startup. This creates a safety hazard, particularly when vehicles become immobilized in active traffic or during winter conditions the cold is when they fail the most, where occupants may be exposed to freezing temperatures while awaiting assistance. Replacement of the oil pump requires extensive disassembly of the vehicle and repairs commonly exceed 6,000–8,000 for just the pump, assuming the motor is unharmed. Owners are currently unable to determine whether their vehicles contain the original thermoplastic oil pump design or a later revised version utilizing metal internal components, as VIN-based parts information now identifies updated components in the car even when no replacement has occurred and the old components are actually in the car. Also, BMW has actively removed the plastic part number out of all dealer networks as well.

Source: NHTSA complaint ODI #11763922 · view all complaints for this vehicle at nhtsa.gov

The ignition start is not clean and delayed. There is already a recall 25V-644. There is "No remedy available" for this model per inquiry with local BMW dealer in Buffalo NY 14221 made 3 weeks ago. I am fearful of an electrical fire from overheating. I do smell an intermittent burning smell but it may in the outside environment rather than from under my hood.

Source: NHTSA complaint ODI #11718142 · view all complaints for this vehicle at nhtsa.gov

Electronic parking brake malfunction, disengage ineffective. Ongoing 2020 BMW mechanical issue, multiple dealer submissions, BMW refuses to open active recall. BMW requires $3,000 center panel replacement, out-of-pocket.

Source: NHTSA complaint ODI #11684702 · view all complaints for this vehicle at nhtsa.gov

I have owned my 2020 BMW m340iX for 2 years. During that time I have had 5 tires blow out, including 3 in the past 3 months alone. The tires are "run flat" and need to be completely replaced if they develop any issues. The dealer I use for service, who is owned by the manufacturer, says it is simply wear and tear - but this pattern is concerning and a potential safety issue for the car and tires.

Source: NHTSA complaint ODI #11443363 · view all complaints for this vehicle at nhtsa.gov

I WAS DRIVING ON THE HIGHWAY AT APPROXIMATELY 70 MPH, THE POSTED LIMIT, WHEN ALL OF A SUDDEN THE SUNROOF EXPLODED. IT SOUNDED LIKE A GUNSHOT AND I ALMOST LOST CONTROL OF THE VEHICLE. LUCKILY THE HEADLINER WAS CLOSED SO THE GLASS DID NOT ENTER THE CABIN. THERE WERE NO VEHICLES IN FRONT OF US FOR AT LEAST 1 MILE AND NO OVERPASSES OR ROCKS THAT I SAW OR HEARD HITTING THE VEHICLE. IT IS A STOCK VEHICLE WITH 5200 MILES ON IT.

Source: NHTSA complaint ODI #11339650 · view all complaints for this vehicle at nhtsa.gov

Component: Front differential / xDrive drivetrain system. Vehicle is available for inspection upon request. Description: My 2020 BMW M340i xDrive has exhibited a persistent whining noise from the front drivetrain since approximately 38,000 miles. The noise varies with speed and load and appears to originate from the front differential. A BMW dealership inspected the vehicle and acknowledged the noise but declined repair under warranty. This condition is consistent with premature wear of internal differential components such as gears or bearings, or improper lubrication. Differentials should not produce whining noises at this mileage, indicating a potential defect. Safety Risk: The front differential is critical to torque distribution in the all wheel drive system. Progressive failure could result in drivetrain binding, uneven torque delivery, or loss of AWD functionality. In a worst case scenario, partial or full differential seizure could occur, leading to sudden resistance, instability, or loss of control. These risks are heightened at highway speeds or in low traction conditions such as rain or snow. The vehicle provides no warning lights or messages despite the abnormal condition, meaning failure could occur without advance notice. Inspection: Issue confirmed by BMW dealership. No repair or corrective action performed. Warnings/Symptoms: No warning lights or system messages. Only symptom is a persistent whining noise from the front drivetrain. Additional Information: I am aware of similar complaints from other BMW xDrive owners reporting drivetrain whining, grinding, and vibration, suggesting a broader pattern of premature differential wear.

Source: NHTSA complaint ODI #11731034 · view all complaints for this vehicle at nhtsa.gov