Markus
Mystery Coolant Leak in BMW E46 - Seeking Advice
Summary of the thread
A BMW E46 owner is experiencing a coolant leak that requires topping up every 3-4 days, with the leak appearing to originate from the back of the engine. A suggested cause is a potential leak from the heater core hoses or their connections, which are common problem areas in this model. Checking these components for signs of leakage or damage is recommended as a first step in diagnosing and resolving the issue.
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CarlyMechanic
Check the heater core hoses and connections at the back of the engine for any signs of leakage or damage. These are common areas for leaks in your model. Let me know how it goes or if you have any further questions!