I recently bought a 2015 F33 420i, it is fitted with Msport suspension.

Suffering from serious back problems I find the suspension far to firm, if not crashy.

I really like the car, is it possible to swop out the Msport suspension and fit standard springs and shocks.

If so what is involved and what set up should I go for.

Morning Brian

Welcome to the Forum

After 10 years the suspension is probably due a refresh, my own experience is often the shocks harden and so your getting little bump or rebound. Start at www.realoem.com if you are not aware it is an online BMW parts list. Put the last 7 digits of your Vin into the search box it will call up your model then search the front and rear axel sections for part numbers. You will see part numbers for M sport and standard springs then search the internet for deals. Front suspension is normally a strut assembly so changing springs and shocks will require a set of spring compressors or often a changing a complete unit is as cheap and less work. Also consider tyres are you still on run flat tyres they can contribute to a hard ride

Good Luck

Dave