Did you ever figure this one out? I have a bad left rear wheel speed sensor. I'm past warranty, so I'm replacing it. I ordered the part and plan on installing it myself next weekend.
'09 E90 M3 SG | VF620 SC | KW V3 | ARC Wheels w/AD08 | OnEighty Lights | BPM Sport coding | AA Catless Exhaust | BMW Performance Wheel | Recaro Child Seat
'13 X3 DSB with M Sport | H&R Springs | Gloss black grill | Coded by me