Coolant Leak Diagnosis
Green, orange, or pink fluid leaking under a BMW 3 Series when the engine runs hot indicates a coolant leak. This is a serious issue that can lead to engine overheating and damage if not addressed promptly.
Diagnosis Details
Possible Causes
Failed coolant expansion tank or hose
Damaged radiator or water pump seal
Cracked engine block or head gasket failure
Related OBD-II Codes
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What You Should Do
Do not drive the car if overheating.
Check coolant level and inspect for visible leaks from hoses, expansion tank, radiator, and water pump.
Pressure test the cooling system to pinpoint the leak.
Replace faulty components and refill with correct BMW coolant.
Related Repairs
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Disclaimer: This AI-generated diagnosis is for informational reference only. Always consult a qualified mechanic for an in-person inspection. AutOwner is not responsible for decisions made based on this information.
