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

Problem Description and Possible Solution

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.

Problem Data
RepairPal Verified
Average mileage: 82,500 (80,000–85,000)
1 model year affected: 2000
4 people reported this problem
Viewing 1 - 2 of 2 comments
I had this problem too, see: engine overheating, my expansion tank was cracked due to overheating and was where the coolant was leaking from...
reservoir cracked along corner edge, catastrophic failure at a stop light--replaced it and the hose under the tank--sill have to replace coolant/water every time I drive it