+1. Or, they were pulled out of their connectors where they connect up to the car on the electrical side. If they simply forgot to unplug them, it could have pulled on the connectors when they dropped the exhaust. Might be repairable when you look and get under the car (or put the car on a lift).Possibly when the shop removed your exhaust, they damaged your sensors in the process.
Sorry for the late reply Zamir. I was actually looking out for your PM. Thanks for the leads above. I have been fortunate not to need much work done to my car apart from the regular fluid changes, brake pads and a battery. I am still under warranty as well. Just looking for a good place to go in the future when warranty runs out and for second opinions when I go to the stealer. I heard of a Sports Car Specialists/Repair on SW freeway between West Park and Fountain View next door to Nexes. A member on this board pointed me that way and mentioned Troy, the lead mechanic who also owns an E39 M5. The funny thing is I ran into Troy who lives out where I live (Katy area) about 2 months ago at a stop-light pointing out that my Magnaflows sound awesome. Talk about small world.the best guy i have found is Bavarian Machine Specialities at 3117 D'Amico. 713-524-8365. He is a perfectionist but is expensive. I did about $7 grand worth of work with him that was only supposed to cost $4 grand (he keeps finding things and trys to fix every little potential problem. He wanted me to replace my rod bearings becaue of high millage, even though there is no indication of any issues with them. He does work on a lot of M-5's and builds race engines. I stopped going there and now use Bemer Motorcars on 9201 Richmond 713-266-2690. I used M-Power at 832-868-4954 most recently for my struts, clutch, O2 sensors and to replace my guibo and differencial bearing at 8620 Richmond. I wouldnt recomend them since they are sloppy and are more familar with M-3's than M-5's. They often leave things loose, and dont go that extra step, but are cheap. With over 130K on my car, cheap works better for me. They eventually gets the job done, but you may have to make a couple of trips. Hope that helps. Who do you use?