r/e91

What are the the best suspension upgrades one does on a 2010 xdrive sports 127k miles(Monaco blue)

A couple weeks ago I posted about finding oil on the tip of my injector. So today, I decided to have a thorough look at the top of my N53 engine. I found oil at the well where the coils and injectors sit. Could this be a leaking VCG that’s causing my rough idle/misfire?

I’ve got a 2007 E91 335i wagon (N54, auto) and I’m at the crossroads of either committing to the car properly or cutting my losses.

Current mods:
- FMIC
- charge pipe
- DCI
- catless downpipes
- LSD

Car still drives well overall and I genuinely love the thing. Goal would be a very sorted, reliable ~450whp street car, not chasing dyno numbers.

Realistically looking at:
- diagnostics/compression/leakdown
- cooling system refresh
- walnut blast
- plugs/coils
- fueling upgrades
- tune
- suspension/drivetrain refresh
- maybe turbos depending on health

I can do a decent amount of the work myself.

Question is:
Would you guys commit another ~$10-15k into a clean E91 at this point, or is this where you move on?

Feels like these cars are either:

1. amazing when sorted
2. absolute nightmares when they aren’t