can i put 91 M5 calipers and rotors on my 94 540i

[tjk009]

without changing out the master cylinder or other parts?

[shogun]

check here on Bruno's site under upgrades>>big brakes
http://www.bmwe34.net/

[mattyb]

from memory the answer is no, I was looking to do the same as you are thinking now. I looked into all the rotor/ calliper sizes etc( Thanx to BIGKRIS). there are slight difference's in the position of the bolts securing the calliper assembly to the back of the hub. the disc sizes are not the same and there were some other pain in the ass things which made forgetting about it easier. Maybe others disagree? dunno

[BigKriss]

All e34 and e32 calipers and brakes are interchangeable as the mounting bolts on the strut are the same width apart.

[mattyb]

there u go I was in fact incorrect

[genphreak]

M5 brakes fit any e34 but you need to include the master cylinder and reservoir as it is sized for them. Possibly the brake booster too).

However only the fronts from an e32 bolt on, rears won't.

Check out this post about what fits- http://www.bimmernut.com/forum/showthread.php/20058-Bigger-e34-Brakes-update-info?highlight=big+brakes, Bruno updated the site once I sent him the confirmed details but I remember looking at it and wondering if he got it all updated properly.

Cheers, Nick

[Barney Paull-Edwards]

Thats a definate yes,my old standard `91 M5 brakes went onto my 535 easy when I found some eight pots.

[genphreak]

M5 brakes fit any e34 but you need to include the master cylinder and reservoir as it is sized for them. Possibly the brake booster too).

However only the fronts from an e32 bolt on, rears won't.

>> Update, sorry that is incorrect. Rears fit fine. I was thinking about e32 rears. Must be going mad (not again, LOL!).

e34 M5 does have different hubs to other e34 though you only need them (and the trailing arms, drive shafts) to reduce track and fit 9" rims on the back the way the M-group used to.