I know a good visual clue to bad mounts can be seen on non m engine mounts as they will create a hole in the hood insulation right above the power-steering reservoir cap. I changed mine out in the blown 330ci at 120k
On my current m3, @ 40k miles, last time I chcked it looked good will be looking for one at around 60k with new spark, and general maintenance
"This vagabond life can I transcend? To give up sleeping beneath the stars. Life on life’s terms does not pretend.
This journey fades as I near the end. The long sleep under Venus and Mars.."
2016 Bimmerfest E46Fanatics BBQ