BMW 525i Problems

Coolant Loss Due to Leak from Expansion Tank on BMW 525i

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.

(26 people reported this problem)

BMW 525i Vehicles With This Problem

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Average mileage: 109,734 (57,000–164,512)
8 model years affected: 1994, 2001, 2002, 2003, more2004, 2005, 2006, 2007
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Viewing 1-9 of 9 comments
my coolant check light comes on after 2 or 3 days of driving I put coolant in it and its fine but i noticed it is leaking on the ground
Coolant leak from radiator. Changed radiator then coolant started leaking from upper rad hose. Can't win for loosing with this car.
First noticed noise from Electric Fan located in front of radiator, as the engine was idling why I was attempting to diagnose the source of the problem, the Engine Coolant message came up on the dashboard, about the time I read it the Expansion Tank Sprang a leak from the hot coolant water that shot out 4-feet into the air.
While driving my car I noticed a smell from the car n noticed it was smoking from over heat. It has this loud noise coming from within