E85/E86 , Z4 , BMW Forum Topics

Sharing my research on performance upgrades for a 2006 BMW Z4 2.5i, focusing on cold air intake and potential additional modifications.

My sunroof won't close all the way anymore, gets stuck or falls back open after closing it manually.

I've recently installed Dinan's S3 Performance Kit on my 2007 BMW Z4 3.0si and I'm eager to share my thoughts on its performance, handling, and overall impact on the car's dynamics, as well as discuss any challenges or surprises that came with the installation process and how it compares to other aftermarket options.

I'm considering replacing the rear diffuser on my high mileage 2005 Z4 with some trim and aesthetic upgrades planned. However, I've never done a job like this before and want to know if it's even necessary or if there are any specific concerns I should be aware of given the age and mileage of my vehicle.

Hi guys, I'm planning to swap my E85's front bumper with an M3 style one and I'd like to know if someone has done this before. If so, what were the challenges you faced? Did you remove the old bumper yourself or take it to a shop? What tools and materials did you use for installation?

Experiencing issues with intermittent stalling and rough idling on my 2008 BMW Z4 2.5i due to faulty fuel pressure sensor, seeking advice.

I'm looking for recommendations on the best coatings to protect the paint and wheels of my brand new BMW Z4. I've heard great things about ceramic coatings like Ceramic Pro and Chemical Guys' Rain Repellent, but would love to hear from others who have experience with these products or other options that might be a good fit.

Seeking advice on how to improve handling and reduce understeer on a stock 2003 Z4, especially with rear-end grip.