Report: Coolant Loss Due to Leak from Expansion Tank
BMW X3 Problem
Average Mileage: 86,944 mi (68,755 mi - 115,000 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, 2005 BMW X3, 70,000 mi
Took to the dealer. They replaced the water pump under warranty (thanks for the freebie). Not until I aquired a high pressure oil leak that I noticed oil and antifreeze mixed on the garage floor. I bought an expansion new expansion tank from BMW for $116.00 ($59.00 part on the internet) and fixed the thing myself in a couplr hours.
Visitor, 2005 BMW X3, 86,000 mi
I had the extension tank replaced about 2 years ago, and the coolant is leaking again.
Visitor, 2005 BMW X3
Expansion tank cracked
Visitor, 2004 BMW X3, 102,713 mi
My coolant light has just come on and when out after three days and diagnostic that couldn't detect anything. Now my service engine soon light is on.
Coolant light was going on and off brought in to dealer, was told the expansion tank was cracked. After examing the tank, BMW said the cylinder head was cracked and the oil was thick and tarry.
Car was serviced at an authorize mechanic at 55K.
Customer service has requested BMW enginner to inspect engine.
I got the impression they may suspect my maintaince under warranty.