E46 brake upgrade

A

A1wil

Member
 salisbury
Hi guys, so I have purchased a set of E46 calipers to increase my disc size at the front. I have a 3.0 2003
Does anybody know if the 2006 3.0si has the same rear brake discs?. The reason why I'm asking is I was looking at buying disc and pad set front and rear. And to me the sizes on the 3.0si look to have the E46 front disc and the rear disc size is the same on the newer 3.0si as my 3.0.
Are my findings correct? I have added a two attachments that I'm using as a reference. If anybody can clarify this it would be much appreciated.
 

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The 3.0si uses the same *front* brake equipment available in the e46 330 models.
The rear calipers and discs, etc. are the same on your Z4 verses a 3.0si.

So when you put the e46 hardware onto your Z4 you're basically upgrading it to a Z4 3.0si brake system.
(so order a Z4 3.0si disc and pad kit)

:)
 
If you search your part on realoem.com you can cross ref all the other vehicles that same part is used on.
https://www.realoem.com/bmw/enUS/part?id=BT52-EUR-06-2003-E85-BMW-Z4_30i&mg=34&sg=12&diagId=34_1286&q=34216794303
 
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