Quote:
Originally Posted by Jadar
Yes you have to code for the 340mm I'm assuming you're using. It's a totally different clamping pressure and you need to have the ecu understand that due to the brake caliper and rotor size change. Coding you need ISTA and the cable. Do a search on the forum there are Memebers that can send you the ISTA program free and the cable is like $30-$40 bucks if I remember correct. I don't know anymore I'm not on these forums that much anymore.
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I guess you'll probably need to install the upgraded Master Cylinder too. All cars that have the 340/370mm 4-piston front calipers from the factory have the larger MC. I've read in other threads that some people, who went your way, had a very mushy pedal afterwards when they didn't change the MC.
Go for one from a 335i/d, which have at least the 340 front caliper. I think it's the same with the ones on M3/M4. Of course, do your homework first.