I have a intermittent issue with my e46 coupe parking sensors (54 plate)
When I get in the car first thing they work perfectly. However if I drive for more than 5 minutes, the next time I put it in reverse the jam on solidly as if I am next to a obstacle of some sort. As far as I can tell they all click when the car is in reverse and work when the car is cold. My next step is to buy one new sensor and swap out one at a time until I figure out which one if any is faulty, but I can't help but think it might be something getting hot and shorting out the sensors. Interestingly if I leave the car off for 5 mins or so when I get back in it goes away, but comes back again after driving for 5 mins.
Any help / advice or anyone else who has seen this problem and knows a fix would be a great help!!
Cheers all and happy driving