The E90/E92 M3 throttle valve actuators are one of the few problem areas on the S65 V8. The Throttle Body Actuators will fail either due to the plastic gears wearing down significantly, or due to the electronics inside. Regardless of the failure, the entire Throttle Body Actuator must be replaced. We STRONGLY recommend replacing both actuators at the same time.
When they do fail, the car will revert to limp mode with poor engine performance and fault codes. In some cases you will have fault codes for the throttle actuators before they fail completely which is why it's important to check for codes regularly (even if your SES light is not on). The replacement is straightforward and is not invasive to the engine (if you can change spark plugs yourself you should be capable of replacing the TBAs).
You may choose the OEM Genuine BMW part, or the VDO(OEM supplier) branded throttle actuators. There are two actuators in each S65 V8 (one for each bank) and we strongly advise replacing both to avoid duplicate repair costs.
This item fits the following BMWs: 2008-2011 E90 BMW M3 - Sedan 2008-2013 E92 BMW M3 - Coupe 2008-2013 E93 BMW M3 - Convertible