There are 2 stored owner reports matching the engine leading-label group for the 2020 BMW 5 Series in our NHTSA-sourced dataset. These are unverified consumer reports and may not reflect confirmed defects.
This group counts stored reports whose component label starts with one of this site's matching prefixes, ignoring case. Each matching report counts once within the group. Components mentioned later in the label or only in the narrative are not searched. How component counts work
Loaded 2 of 2 matching reports.
Open the full vehicle complaint log (all categories)I am reporting a potential safety concern with my engine. The oil pumps are known to fail due to plastic internal components. BMW has issued a new pump with metal parts, but existing engines are not being helped and if oil pressure drops the car can suddenly stop in traffic, creating a safety hazard.
Component: Engine Oil Pump (Plastic Internal Variant) Safety Risk: Sudden Loss of Motive Power / Engine Seizure Defect Description: The oil pump in the BMW B58 engine utilizes a plastic tensioning/adjusting ring that is prone to brittle fracture. At only 38,000 miles, my vehicle suffered a catastrophic internal pump failure, resulting in an immediate "Low Oil Pressure" warning and forced engine shutdown. Safety Hazard: Stalling at Speed: This defect causes an immediate loss of propulsion. If this occurs during highway merging or high-speed maneuvers, the driver faces an abrupt loss of power steering and braking assist, significantly increasing the risk of a high-speed rear-end collision. Imminent Seizure: Total oil pressure loss can lead to crankshaft seizure, potentially locking the drive wheels and causing a loss of vehicle control. Technical Evidence: BMW has released an updated part (P/N 11419895359) that replaces the plastic internals with a metal housing, acknowledging the original design is insufficient for the thermal loads of the engine. Post-repair inspection of my vehicle showed significant carbonized "soot" in the filter, indicating that the pump's underperformance caused localized overheating of the lubricant prior to the final failure. Request: NHTSA should open an investigation into the B58 oil pump (2019–2021 models) to determine the failure rate of the plastic-ring units. A safety recall is necessary to replace these units with the updated all-metal version before a high-speed seizure results in a fatality.
Complaints are unverified consumer reports submitted to NHTSA. A high complaint count may reflect vehicle popularity, not defect severity. Data sourced from NHTSA public records.
NHTSA source checks for this vehicle year
Checks are recorded separately for each dataset, not for the whole page. Dates use UTC. A missing check date does not mean no records exist.
Vehicle import recorded: Aug 30, 2026. This is the stored import date, not confirmation that every source was successfully refreshed.