Some BMW 330i owners report experiencing intermittent flashing of the red oil light when braking after approximately 30 minutes of driving, which may indicate several potential issues. These include low oil levels that cause oil to slosh away from the oil pressure sensor during braking, as well as oil pressure problems stemming from a faulty oil pressure sensor, a malfunctioning oil pump, or engine oil leaks. Additionally, some owners have noted that engine oil leaks can decrease oil pressure and trigger the oil light when braking. Other concerns may involve insufficient or degraded engine oil, a faulty oil pressure sensor, defective oil injectors, or electrical issues. It is crucial for owners to address these potential causes promptly to avoid further engine damage, and it is advisable to have the vehicle inspected by a qualified mechanic for proper diagnosis and resolution.
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