[Spooly]

So I have a 2011(n55) e90 and I'm almost at 100k. I bought it around 90k and besides oil changes/vanos solenoids, maintenance history is pretty unknown. When I was recently changing the oil I noticed the oil pan gasket seep has gotten worse and decided that maybe it's time to take the plunge and have it replaced. I also noticed the control arms up front looking quite worn (dry and cracked). So naturally now I'm also considering doing the M3 control arms up front, as a while you're in there kind of thing. I'm also aware that transmission should probably be serviced soon too. Before all of this I was considering doing the billstein b14 coilovers since they can be had for a little over $800 now. Anyway, my final question is does it make sense to do all of these things together? There should be some overlap no? How many hours of labor am I looking at here? Thanks!

[BMWinAZ]

There is not really that much labor overlap between most of that front suspension work and the oil pan gasket (as always I could be wrong), what however is almost 100% labor overlap is replacing the engine mounts. Whatever else you do or don't do, have the engine mounts replaced at the same time your oil pan gasket gets replaced.

[BMWinAZ]

Not sure about the labor hours, but the labor cost for the oil pan gasket is somewhere in the $ 1000 territory.

[Efthreeoh]

Other than the 45 seconds to get the car in the air on the lift, there's really no labor savings. Oil pan takes a drop of the subframe, but no suspension parts are removed. Transmission work is completely unrelated.

Thrust arms and control arms replacement should save a tiny bit if replacing the struts at the same time. An experienced BMW mechanic can replace thrust and control arms in 20 minutes a side. Taking the thrust and control arms off helps get the strut out easier.