NHTSA complaint #11692309

Owner complaint summary

The electronic oil level sensor was unable to complete an oil level measurement on the iDrive screen. Diagnostic inspection at a BMW Dealership (Mt. Kiso) and EuroTech Auto Repair (Larchmont, NY) revealed that the oil pump had degraded internally, specifically due to failure of plastic components. All Sensors were working fine and showed no faults. This failure could not be detected by regular maintenance and posed a risk to engine reliability and potential sudden loss of lubrication. The car had approx 55,000 miles, was purchased purchased after my 3-year lease (original owner of new vehicle), and the incident occurred during normal use. There were no warning lights or symptoms before the oil measurement stopped working. This defect appears to be a design/materials issue affecting other similar vehicles. The failed oil pump has been replaced at my expense. I am concerned this part presents a broader safety and reliability risk and should be considered for recall.