flexdisc, the manual trans does.



Quote Originally Posted by Rus View Post
Some automatic 535i and 735i cars do not have a flexdisk. Mine does not have one either. As for the "sensor", it looks like the connection point of the transmission harness. Have a look here: http://www.realoem.com/bmw/showparts...74&hg=24&fg=15

See o-ring #10? That's what is likely causing the leak. While you've got the driveshaft out, consider replacing the final drive output shaft seal. Those tend to weep fluid as well and it makes a mess on the tail of the transmission.