Quote Originally Posted by rhauptschein View Post
Update

1. what average (and range) mileage do they fail?

2. How many are there on the Volvo and location? What is its function?
1. 30-100k miles depending on how the car is driven - the throttle position sensors wear out - mild driving keeps the throttle almost in the same position wearing them out quicker.

2. 2 Bump stops in the rear - 1 on each side, to keep the suspension from bottoming out metal to metal, the front ones are installed at the top of the struts.

If you buy a new throttle it requires a download from volvo to make it work after it is installed. "Rebuilt" modules require programming also - Aftermarket companies program the throttle using your VIN number before it is shipped and installed. And re builders such as xemodex use non-contact potentiometers to prevent future failure.

Don Willson - mentioned in this thread

https://www.volvoxc.com/forums/showt...g-ETM-Failures

was instrumental in getting volvo to warranty throttle modules for 10 yrs/x miles - valid only in the US.