BMW X5 Problem Report

BMW X5 Coolant Loss Due to Leak from Expansion Tank

(40 reports)

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.

Expansion tank was cracked. I purchased a new one and installed myself (very easy) and solved the problem. If only all of the other fluid leaks on this car were this simple.... -
Crack down side of tank. Had to replace expansion tank -
Vehicle lost all fluid instantly, luckily as I parked at my house. No overheating warning. It cost 625 to replace tank and do full coolant system test and service....at the dealer. -
leak from plastic fitting on engine side of hose. part # 17-12-7-509-967 -
expansion tank cracked, towed to dealership for repair, replaced with new tank, cost me over $800 in total. crazy!!! my fetal $21K mistake. Just bought last month and this car already cost me so much trouble, don't buy used BMW, I may have to trade it in for a Japanese car. -
One inch hairline crack halfway down the side of the coolant reservoir. Low coolant light on dash. Not sure why this tank would crack. I've never owned another make of car that has this reservoir problem. Solution is replacing tank and hope the second tank won't fail. Never had an overheating signal on the dash. -
Expansion tank split at the seam. Had tank replaced at Reliable Import Service in Raleigh NC. -
replaced wt new container -
Hairline crack in coolant expansion tank - replaces tank -
Hairline cracked. -
hair crack in expansion tank. -
leaking engine coolant -
cracked expansion tank. replaced radiator and tank, $1000. -
This is going to be my the 3rd expansion tank -
Large crack. Dealer fixed for free. -
Expansion tank cracked causing loss of coolant and subsequent overheating. Possible major engine damage. -
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I have replaced the expansion tank but the new one is leaking also