2020 Toyota Supra

I am reporting a safety concern involving BMW and Toyota vehicles equipped with the B58 Technical Update (B58TU) engine, commonly found in 2019–2021 models. These engines use a variable displacement oil pump with an internal thermoplastic adjusting component that regulates oil pressure. Field reports show this component can fracture, causing sudden loss or instability of oil pressure—most often during cold starts in low temperatures. When the part fails, oil pressure regulation becomes erratic or disappears entirely, often with little or no useful warning before engine damage or vehicle disablement. Reported early signs include failed electronic oil level readings, abnormal pressure behavior, or sudden drivetrain malfunction messages. Failures can quickly escalate to engine shutdown or severe mechanical damage from oil starvation. A loss of lubrication may disable the vehicle without warning while driving or shortly after startup, creating a safety hazard—especially in winter conditions when failures are most frequent and occupants may be exposed to freezing temperatures. Repairing the issue requires major disassembly, and oil pump replacement alone typically costs $6,000–$8,000 if the engine has not been harmed. Owners cannot reliably determine whether their cars contain the original plastic based pump or a later metal component revision because VIN based parts data now shows updated components even when no replacement occurred, and BMW has removed the original plastic pump part number from dealer systems. Failures have been reported across multiple production years, and the exact population of affected vehicles remains unclear. Because this defect can cause sudden, warning free vehicle disablement—particularly in cold weather—I believe it warrants investigation as a potential safety related issue. One of the main indicators of this issue is the inability to determine oil level, my car has never been able to determine oil level. Thank you.

The contact owns a 2020 Toyota Supra. The contact stated that while attempting to start the vehicle with the Push-to-Start button, the vehicle hesitated while starting. A message that the engine was overheating was displayed. The contact stated that the vehicle was idling in Low Power Mode while at a stoplight, and the vehicle hesitated while accelerating with the accelerator pedal depressed. The vehicle then suddenly jolted forward. The failure was temporarily fixed after shifting to SPORT Mode. The vehicle was towed to a local dealer, where the starter was replaced. The vehicle was repaired; however, the failure reoccurred. The vehicle was towed to a local independent BMW Service Center, and the starter was replaced; however, the failure reoccurred. The manufacturer was made aware of the failure. The failure mileage was approximately 25,000.

I am reporting a safety concern involving BMW and Toyota Supra 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 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. Multiple BMW and Supra owners are experiencing this costly issue. Please investigate this issue.