Stretch bolts for underbody brace

G

Grose

Member
I will be taking off my e85 underbody brace in the next few weeks and as I understand it, the bolts cant be reused. Having checked realoem, I still cant identify the correct part no. Does anyone know the part number or bolt size please?
 
It's the below diagram and you want the 50mm bolts (07149140997). I can tell you that 35mm, which are very common on BMWs, definitely aren't long enough as I tried to reuse some on mine! Weirdly, the equivalent bolts for the M are 40mm. :?

http://www.realoem.com/bmw/enUS/showparts?id=BU12-EUR-08-2007-E85-BMW-Z4_25i&diagId=51_4957

They will be surprisingly expensive, so if they are in good condition you could re-use your current bolts once. Mark them with a blob of paint and check them periodically. You could also just source your own M10x50mm 10.9 bolts from Amazon, eBay etc.
 
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