Great thread.
I complained to BMWNA as this happened to me after my warranty went out. After about two weeks of stressful negotiating, the dealer gave me a goodwill price that was significantly better than the initial estimate. I have a feeling that we are going to see a lot more of these Throttle Actuator issues on higher mileage e9x V8s as time goes on. If anyone is looking to buy a used M3, it is best to look into whether this work has been done on the car they are considering.
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Originally Posted by aznboi319
Is there any way to know if these actuators are starting to go bad? What do these actuators really do (sorry I am pretty noob to how internals of an engine work)? I have near 60k miles on my car and my car idles like I need a minor valve adjustment. I probably should have checked these out prior to installing the supercharger.
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Definitely have your engine checked out. My car threw the code and went into limp mode. Upon restarting the car, everything went away, so I drove like that for a few weeks. It eventually got to the point where it would take several off/ons to get limp mode to go away, which was just a massive pain in the ass. After visiting the dealer they told me what needed to be replaced, however, the car never ran like it had any issues.