Change BMW B47 air cleaner & mass air Flow sensor clean Diesel 20d 2.0 120d 320d 520d X3 lci X1 X4

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Not just the basics but I also explain the Mass Air Flow sensor what it does and how to clean it.

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Thanks for watching this Mark's reviews and Tutorials video. Mark is not a trained mechanic. Just a car guy that loves to drive and work on cars. What I do here may not work on your car and I am not intending to give professional advice for you to work on your car. But if you do know a bit about cars then hopefully watching these videos will help you to sort out what is going on with your car. Mark is not liable or responsible for any damage you do or things that happen to your car or yourself.
Cars are complex and dangerous things and not only can you be hurt working on them but you can also do serious and expensive damage to your car.
Cars should be worked on by qualified people, don't over reach.