1. carlos.pena

    Single Turbo N54 - Passing emissions

    Hey everyone ! Im due for an emissions test soon and looking for some advice on how to pass properly. I have a temporary 30 day permit before they fail me :( Here are some things that I know I need to do. Please let me know if im missing anything else Take back up of stock tune via MHD (...
  2. K

    Single Turbo Emissions e92 n54

    Hey! I made this post to hopefully help out another single turbo n54 owner looking to pass emissions. Information on my car - 2007 335i N54 On3 single turbo kit Manzo catback exhaust E60 mix on a custom tune (jb4 + mhd bef) I am in Colorado, typically for a 2007 they would do the test on the...
  3. Seaneezy

    2C7E/emissions codes lingering

    No idea what the hell is causing this anymore. The codes were involving both post-cat o2 sensors and pre-cat o2 sensors with lamba/mixture errors. I replaced both back o2 sensors and the front o2 sensor that was giving codes, they still appeared. At this point I assumed it had to do with my car...