2019 BMW X7 Powertrain & Transmission Problems

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 use a variable-displacement oil pump with an internal thermoplastic component that regulates oil pressure. This component is increasingly failing in the field, often fracturing and causing sudden loss or instability of oil pressure. Failures commonly occur during cold starts in low temperatures. When the component breaks, oil pressure may become erratic or drop entirely, often with little or no warning before engine damage or vehicle shutdown. Early warning signs can include inability to measure oil level, abnormal oil pressure behavior, or drivetrain malfunction alerts. In many cases, failures quickly lead to engine shutdown or severe damage due to oil starvation. This can leave vehicles suddenly disabled while driving or shortly after startup, creating a safety risk—especially in traffic or in cold weather, where occupants may be exposed to freezing conditions while waiting for assistance. Repair requires extensive disassembly, with oil pump replacement alone typically costing $6,000–$8,000, excluding additional engine damage. Owners also cannot reliably determine whether their vehicle has the original thermoplastic component or an updated metal version, as parts databases now default to the revised design regardless of what is actually installed. Failures have been reported across multiple model years, and the full scope of affected vehicles remains unclear. Because this issue can cause sudden vehicle disablement without adequate warning—particularly in cold conditions—it may represent a safety-related defect warranting investigation.

Safety Defect Report — Engine Oil Pump Failure (BMW B58TU Engine) Component or System Involved The failure involves the variable-displacement engine oil pump installed in BMW vehicles equipped with the B58 Technical Update (B58TU) engine, commonly found in model years 2019–2021. The oil pump contains an internal thermoplastic adjusting component that regulates engine oil pressure. Field reports indicate this internal component can fracture, causing unstable or complete loss of engine oil pressure. The failed component may be available for inspection upon request if retained after repair. Description of Failure and Safety Risk When the internal thermoplastic adjusting component fails, engine oil pressure regulation becomes erratic or is lost entirely. This results in insufficient engine lubrication and may cause sudden engine shutdown or severe mechanical damage due to oil starvation. Loss of engine power or complete engine disablement can occur without adequate warning, creating a safety hazard if the vehicle becomes immobilized while driving or shortly after startup. This risk is heightened when the failure occurs in active traffic or in cold weather conditions, where occupants may be exposed to freezing temperatures while awaiting assistance. Operating Conditions and Failure Pattern The failure most frequently occurs during cold-start operation in low ambient temperatures. Failures appear to progress rapidly once symptoms begin. Warning Lamps, Messages, or Prior Symptoms Reported precursor symptoms may include: Inability to electronically measure engine oil level. Abnormal or unstable oil pressure behavior. Sudden drivetrain malfunction warnings. Minimal or no actionable warning prior to engine damage or shutdown. These symptoms may appear shortly before failure or may not provide sufficient time for corrective action. Inspection or Confirmation of the Problem Field failures have been reported across multiple vehicles and production years. In many cases

Transfer case goes bad on all 2019 models. I'm in awe that there's not a recall on it. A replacement costs around $9k. Somebody should look into this. Thank you

the transfer case for this 2019 is failing, and cannot be repaired without changing the entire case according to the mechanic notes. there is a significant grinding when turning at slow speeds and a locking-up feeling to the steering. dealer will not admit to any issues. car was inspected by an independent certified BMW mechanic no warning or indication given other than the impaired handling of the vehicle.