Coolant Loss Due to Leak from Expansion Tank on BMW 323Ci

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.

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Average mileage: 132,500 (76,000–208,000)
1 model year affected: 2000
9 people reported this problem
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problem details
2000 BMW 323Ci 115,000 mi,
Coolant light came on and within 10 minutes the temperature gauge went into the red and the car shut off. Had it towed to shop. Replaced expansion tank, hoses, and water pump for $800.
2000 BMW 323Ci 76,000 mi,
Overflow problem