bmw F20 m140i DSC coding - f30 340 maybe?

amir m140i

New Member
Apr 1, 2025
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the short story:
Hi, I have BMW 140i and I want to code to it The DSC of the BMW 340i, I'm basically doing it because the 340i tire sizes are the same as the tire sizes that I have on my car. And my car DSC freaks out cuz it expects different tire sizes. Hence different rotation speeds of the wheels.
Does anybody know if it can be done? how/what to code in the dsc to ease the dsc? compensate for diffrerent tire sizes? nettodat? friction coefficients?

long story:
the oem tire sizes are 225.40.18 front 245.35.18 rear. the fornts are 1.2%larger than the rear.
i ran 255.35 rear and 245.35.18 front the dsc was going absolutely nuts on corners, changes to the 255.35 in the front and 245.35 back to the rear and the car was amazing WO any issues! than i found out the the diameter of 255.35.18 is almost the same as the 225.40.18 oem tire.
now i ran 255.35.18 square setup. and the DSC is somewhat freaking on high speed corners. i'm sure its the tire sizes.
long story short. the f30 340 wich underneath hould be almost the same as the 140i comes with 225.40.18 fron and 255.35 rear. it will be great if i can code it's dsc on my car, or somehow tell the DSC that i have different tire sizes/compesate somewhere ithe the speed readings.


thanks!!!
Amir