IllustrationI own a 2019 BMW 540 with B58 engine and I have begun noticing abnormal rattling noise from the engine area, which may indicate early stage failure of the oil pump assembly. There are widespread reports from other owners of failure of the oil pump rotor housing/adjusting ring due to heat-related degradation of plastic components…
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I own a 2019 BMW 540 with B58 engine and I have begun noticing abnormal rattling noise from the engine area, which may indicate early stage failure of the oil pump assembly. There are widespread reports from other owners of failure of the oil pump rotor housing/adjusting ring due to heat-related degradation of plastic components. Failure of this component can lead to sudden loss of oil pressure, drivetrain malfunction warnings, and ultimately engine seizure while driving. Sudden engine failure at speed presents a significant safety hazard due to loss of propulsion and potential inability to maneuver out of traffic. BMW has reportedly updated the oil pump design to an all-metal version around mid-2020, suggesting awareness of a design failure. I am submitting this report as a potential early indicator before catastrophic failure occurs.