The mounting bracket is a plastic frame that sits with the X3 radiator support and gives a mounting location for the E83 X3 expansion tank. The frame itself is not a source of leaks or failures but having a new complete mounting bracket makes changing the reservoir a breeze instead of a struggle. The tank and the bracket are both plastic and will easily crack. Pre-assembling the tank and bracket as a unit means you won't have to struggle with a stubborn tank or broken parts.
Only for cars with automatic transmission.
This is a new Genuine BMW expansion tank mounting bracket. It comes with the coolant connector, o-rings, as well as the locking tab for the transmission oil cooler. A new thermostat is recommended. All parts have a two year warranty.
BMW Fitments:
X3 Series
E83 X3 (04-10) > X3 2.5i M54 (2004-2005)
E83 X3 (04-10) > X3 3.0i M54 (2004-2006)
E83 X3 (04-10) > X3 3.0si N52 (2007-2010)