1. V

    Technical 550i O2 sensor for single turbo

    This sensor recommendation is unverified, proceed at your own risk. Lately I've been hearing through the facebook grapevine of 550i O2 sensors being recommended for single turbo use. Then someone else told me they are the same as ADV, but I'm not sold on that claim. Realoem indicates they are...
  2. 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...