DISA Rebuild Kit from German Auto Solutions for 3.0L only: https://amzn.to/2OLJy5h
DISA Rebuild Kit from German Auto Solutions for 2.2L and 2.5L: https://amzn.to/2LTq00Z
Lower Intake Boot (for 3.0L): https://amzn.to/2naPl7z
Lower Intake Boot (for 2.2/2.5L): https://amzn.to/2OdDEZd
CCV replacement kit: https://amzn.to/2M2urFX
CCV cold climate kit: https://amzn.to/2AJNHUi

The P0171 and P0174 codes will plague every owner of an E46 or E39 BMW at some point in their lives. So, 99 times out of 100 they are caused by a vacuum leak and on the M54/M52 engine there are a few common causes of vacuum leaks. So common that I'd say 95% of cases will be covered by what I go over in this video. I also talk about what a vacuum leak is, how a MAF sensor works, and so on.

One thing I don't cover in this video is how to test your oxygen sensors to see if they are working. I will do that in a future video.

Please also take a look at these other videos I've published:

E46 Common Repair Steps
   • BMW 330i 325i E46 Common Repair Steps...  

E46 CCV Replace & Intake Removal (Part 1) - See It Clearly!
   • BMW 330i 325i E46 CCV Replace & Intak...  

E46 CCV Replace & Intake Removal (Part 2) - Put It Back Together!
   • BMW 330i 325i E46 CCV Replace & Intak...  

Good luck!