The mounting bracket is a plastic frame that sits with the E53 X5 4.4/4.8is N62 radiator support and gives a mounting location for the E53 X5 4.4/4.8is N62 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 Genuine BMW expansion tank frame with a two year warranty. Buying a Genuine part will usually be more expensive than an OEM or aftermarket brand but you are assured that it meets BMW's designs for fitment, performance, and longevity. It will also be the very latest design, incorporating any updates or revisions that an aftermarket brand typically will ignore.
BMW Fitments:
X5 Series
E53 X5 (00-06) > X5 4.4i M62 (99-03)
E53 X5 (00-06) > X5 4.4i N62 (04-06)
E53 X5 (00-06) > X5 4.6is M62
E53 X5 (00-06) > X5 4.8is N62