Car Problem Reports

BMW 330xi Coolant Loss Due to Leak from Expansion Tank

BMW 330xi Problem
12 Reports
Me Too

Model Years Affected: 2001, 2002, 2003, 2004, 2005, 2006

Average Mileage: 130,333 mi (81,000 mi - 162,000 mi)


An engine coolant leak may develop from the expansion tank resulting in engine overheating. When a cooling system component fails the entire cooling system should be inspected. It is not uncommon to find additional component have failed or are leaking.

Overheating can cause severe engine damage. If the engine begins to overheat it is recommended to stop at the first available location and have your vehicle towed to a repair shop.

  • Visitor, , 81,000 mi

    coolent resevior cracked and leaging badly. Ordered a new one for $51.77. Will install myself.

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  • Visitor, , 162,000 mi

    over heating and coolent leak from driver side up front. discovered it was the expansion tank. treplace tank and solve issues.

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