[jsk5599]

Id imagine that I am in a similar situation as a few people with an F30. I bought a 335i xDrive Sedan, CPO. I also have the extended maintenance program.

However I have the mod bug. My previous car had very few stock parts on it.

Here is the question that I could use some help from more experience BMW owners:

BMW doesn't cover suspension parts in the CPO warranty or the Extended maintenance per the fine print (at least thats my interpretation) so what is the point of staying with stock parts? - shocks normally wear would 40-50k miles.
Would using aftermarket coil-overs or shock/struts expose me to warranty issues?

The car is far too soft, the xDrive was a necessity as I move frequently and an extra set of wheels and tires for winter was a real PITA with my last car. It seems that modifying the xDrive cars is far harder and I'm concerned about damaging wheel bearings, half shafts, or any other xDrive component that is sure to be expensive by changing suspension geometry.

If anyone has come across this issue or has experience please let me know.
Also let me know if my assumptions about BMW warranty/extended maintenance is wrong

Thanks!