e89

Hey guys, I'm trying to solve misfires on cyl 6 on heavy loads. My car is Z4 E89 35is with DCT and around 80k mileage. Problem started to show after stage 2+ from mhd, it appears on continuous heavy load (flooring) and higher gears. I noticed it more often on hot day. I've done the following...

Hi everyone, I came to this forum because of quality content I've found by google. I'm working right now on Z4 35is and hope to find some answers here with performance mods. Keep doing a good work!

I want to take the next step in the tuning of the engine , but I have some limitations to do this. I live in the Netherlands, that means I can't eliminate the cats in the downpipes, because then the car will fail it's yearly inspection. But downpipes with race-cats are almost impossible to find...

For those that would like to integrate the Low Pressure Fuel Sensor (LPFS) from the 135/335 into their Z4 35i/s I made this tutorial video. The video covers the mechanical and electrical aspects but you will need to consult a tuner for the firmware integration. I’m currently using it in...

Just bought a E89 Z4 35is DCT that's getting a bottom mount single turbo. What dual in-tank fuel pump solutions for the Z4 is out there?

Weeks ago @fmorelli asked me to post this topic in a separate thread. In between, this project has been finished as well and the "upgraded" back lights ar mounted in the car since about 6 weeks without any problems.

I downloaded the new android app for Pro Tools for coding. I inadvertently did something I shouldn't have and now the rear windows only go down about 4 inches at a time (6 down button clicks). This causes the hardtop not to go down and an error that states Window Anti-Tripping Error. I have...