Seeing a coolant leak under your BMW, or getting low coolant warnings? A cracked or leaking expansion tank is a super common issue on these cars. This TAUTOY tank is a direct aftermarket replacement to get you fixed up without the dealership price tag.
**Fitment is critical:** This tank is compatible with many BMW 5 Series and 6 Series models from 2004 to 2011. This includes the E60/E61 chassis (like the 525i, 528i, 530i, 535i, 545i, 550i) and the E63/E64 chassis (645Ci, 650Ci, 650i). It replaces the original BMW part numbers 17137542986, 17137519219, and others.
**Please double-check!** Use the full list in the description and confirm it matches your specific BMW's year, model, and engine. The tank is made from heat-resistant PA plastic designed to withstand the engine bay's vibration and temperatures. It's a direct bolt-on replacement, so installation should be straightforward if you're handy, or any good mechanic can do it quickly. Comes with a 1-year warranty for peace of mind.
