Engine owner reports: BMW X3 years in the records

The records describe a possible crash, fire, injury, or loss of control.

“I own a 2020 BMW X3 M40i, VIN [XXX], manufactured November 2019, now at approximately 100,000 miles, equipped with the B58TU engine. My oil level sensor stopped completing measurements at approximately 45,000 miles, a known precursor to thermoplastic oil pump failure. For 55,000 miles I had no way to identify whether my vehicle contained the defective component because BMW removed the original thermoplastic part number from all dealer networks. VIN-based lookup now falsely returns updated metal component information regardless of what is physically present in the vehicle. This makes proactive identification impossible for both owners and dealers, meaning the defect cannot be remediated even by willing owners. I had no actionable path forward. On [XXX] I was driving on a Florida highway at 80 mph when a low oil pressure warning appeared. I pulled over immediately. A fault log pulled at 2:05PM showed code 1C3002. A second log pulled at 6:49PM after briefly running the engine showed three additional oil system faults including 1C2002 - engine oil pump pressure too low - indicating active progressive failure within hours. This failure occurred in 90 degree Florida summer heat, not cold weather. If NHTSA’s investigation is scoped around cold climate failures, my case demonstrates that scope is incomplete and the affected population is broader than currently documented. Carfax records confirm 18 total service records over 100,000+ miles, including 8 dealer visits between 18,000 and 50,000 miles under active CPO warranty. This vehicle has been consistently and properly maintained throughout its life. The vehicle became a safety hazard at highway speed without adequate warning. I will file a second complaint after physical inspection confirming which pump variant is actually present. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)”

The records describe a possible crash, fire, injury, or loss of control.

“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. Warning signs, when present, include inability to measure oil level electronically, abnormal oil pressure, or sudden drivetrain malfunction warnings. These can rapidly progress to engine shutdown or severe damage from oil starvation. This creates a dangerous situation because the vehicle can become disabled without warning while driving or after startup. This is especially hazardous when cars become immobilized in traffic or during winter conditions when failures occur most frequently, leaving occupants exposed to freezing temperatures while awaiting assistance. Pump replacement requires extensive disassembly and commonly costs $6,000-$8,000, assuming no engine damage. A critical concern: owners cannot determine if their vehicle has the original plastic pump or the later metal revision. BMW's VIN-based parts lookup now shows updated components even when original plastic parts remain installed, and BMW has removed the original plastic part number from dealer networks entirely. Failures are reported across multiple production years, and the scope of affected vehicles remains unclear. Because this condition causes sudden vehicle disablement without adequate warning, especially in cold weather, I believe this warrants investigation as a potential safety-related defect.”

The records describe a possible crash, fire, injury, or loss of control.

“This recall was in September 2025, and for a starter issue that could cause a fire. Despite the urgency of this recall, it's now six months later, and I am still getting a response from BMW "Remedy Not available". So, in the meantime BMW advises to keep the car outside in the hot Florida sun so it doesn't burn the house down. This is a totally unacceptable situation, and I would appreciate the NHTSA following up with BMW regarding why the delay. It appears to me that BMW is dragging their feet on correcting this serious issue.”

The records describe a possible crash, fire, injury, or loss of control.

“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. They are aware.”

The records describe a possible crash, fire, injury, or loss of control.

“I am reporting a driver safety concern involving BMW vehicles equipped with the B58 Technical Update (B58TU) engine in model years 2019–2021. These engines use a variable-displacement oil pump containing an internal thermoplastic adjusting component that regulates oil pressure. Field failures show this component can fracture, causing sudden loss or instability of engine oil pressure. Failures most commonly occur during cold starts in low temperatures, it can occur at any time or temperature. When the part breaks, oil pressure becomes erratic or is lost entirely. Drivers often receive little or no actionable warning before the vehicle shuts down or suffers severe engine damage. Precursor symptoms may include inability to measure engine oil level electronically, abnormal oil pressure behavior, or sudden drivetrain malfunction alerts. In many cases, the condition rapidly progresses to engine stall or mechanical failure due to oil starvation. Loss of lubrication can disable the vehicle without warning while driving or shortly after startup. This creates a serious safety hazard, especially if the vehicle stalls in active traffic. The risk is heightened in winter conditions—when failures occur most often—because occupants may be stranded in freezing temperatures while awaiting assistance. Repair requires major disassembly, and oil pump replacement alone commonly exceeds $6,000–$8,000, excluding additional engine damage Owners cannot reliably determine whether their vehicles contain the original thermoplastic oil pump design or a later revised version with metal internal components. VIN-based parts systems now default to the updated design even if no replacement has occurred, and the original plastic component part number has reportedly been removed from dealer networks. This lack of transparency prevents owners from assessing their risk. I believe this represents a known manufacturer defect with direct driver safety implications that warrants formal investigation”

The records describe a possible crash, fire, injury, or loss of control.

“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 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 when engine damage occurs. 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 even when no replacement has occurred. Failures have been reported across multiple production years, and affected vehicle population boundaries remain unclear.”

The records describe a possible crash, fire, injury, or loss of control.

“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. A recall should happen”