How I Diagnosed My Failed Oxygen (Air Fuel Ratio) Sensor - BMW DIY

In this video I show you how I was able to diagnose my bad O2 sensor . I have a 2008 BMW 335i with the N54 twin turbo inline 6 cylinder engine. It turned out to be bank 2 sensor 1 that was bad. I had a number of random misfire codes and mixture codes but nothing specifically pointing to a bad oxygen sensor.

If you think you might have a bad sensor but aren't sure what signs to look out for before the sensor completely fails this video should be helpful.

If you have a BMW 335i and need a sensor you can buy one here (it helps the channel):

Bank 1 Upstream:

https://bit.ly/2WXaD9l

Bank 2 Upstream:

https://bit.ly/2ticRCG

Bank 1 Downstream:

https://bit.ly/2UP6r9T

Bank 2 Downstream:

https://bit.ly/2tdIi12

If you have a BMW and want to setup the software shown on my laptop:


We are using the INPA software suite to code the injectors.

Link to a thread showing how to setup INPA/NCS Expert:

http://www.e90post.com/forums/showthr...

If you have Windows 10 64-Bit:

http://www.e90post.com/forums/showthr...

You can find the INPA cable online at places such as Amazon or Ebay. Search INPA Cable K+D Can. When you see the word "affiliate" listed beside any link in my description please know that this is a custom link and I will earn a small commission if you opt to purchase using said link. This is at no extra cost to you so it's a win all around :) Thank you!