[cibaa]

My bmw m4 (f82) went into differential limp mode at the track yesterday. I used ISTA+ to diagnose the issue and verified that the wiring harness is not shorted or open. The service procedure says to replace the Differential Servo motor which is $500 new.

Should I bother to throw parts at this or do I spend $3500 on a drexler diff, I hate having electrical failures and this leaves a bad taste in my mouth about the ediff.

[Redd]

Best person to ask is @driftflo in this thread - https://www.m3post.com/forums/showthread.php?t=788992

[Track/S]

If you plan to ride on a circuit or in the mountains, changing to a Drexler is the best option. Keep in mind that apart from diff you need a left driveshaft and coding.

M2 CSR Drexler diff is a best option.