Originally Posted by
Kitchen Devil
The vehicle speed sensors on these are quite common for failing and as said above can be a complete bastard to replace if the pin which secures it in place is seized.
Even if the pin's not seized it's still a 'mare to get the actual sensor to come out.
If it turns out to be the VSS use a good pair of side-cutters to carefully lever the pin out, then keep wiggling the sensor while pulling upwards and it will slowly come out. They don't like to be rushed. TBH I'd be wary of taking it to a garage as they may just use brute force, and snap it, knowing that you'll be picking up the tab for getting it out the long winded way.