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Bimmerzone Corp. | 831 Lincoln Ave, Suite 3 | West Chester, PA 19380 | USA
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Shop BMW MAFS Cleaning

WHen you start to feel some hesitation or poor idle or even poor gas consumption (low MPG), it could be due to dirty Mass Air Flow Sensors (MAFS). MAFS are considered consumables and should be replaced approx 60k to 80k miles. If you need replacement MAFS, please check out BMW Mass Air Flow Sensor Page. But intermediately, you can clean the MAFS to keep it in tip top conditions, you can do it in intervals of 15k miles or 20k miles. Cleaning the MAFS are very simple. Take a look at this general guideline and see that it only takes about 15 mins. This procedure was done on a 2007 BMW 550i but other models should be in general the same procedure.

Step 1

Locate your MAFS under the hood, its very simple to find, remove the clips that cover the sensor (for some models, it might be easlier to remove the entire unit)

 

 

Step 2

Using the appropriate Torx bit (some BMW use the 5 or 6 star, some are security torx and some are regular torx), so check which one you have prior to removal

 

 

Step 3

Once the MAFS is removed from the housing, disconnect the MAFS from the wire hardness, show in the arrows above.

 

 

Step 4

Use a MAFS cleaner (you can pick this up at your local auto parts store, we dont stock as we cannot ship this item) and follow the instruction on the can, its pretty simple. Just make sure that its fully dry before reinstalling it back into the housing

 

 

Step 5

Once cleaned, putting it back is as simple as removing it, just follow the process in reverse and you are all set, you will now enjoy a smoother idle, better acceleration, and more to original conditions!

 

 

Happy Motoring guys!

 

Vincent

The Bimmerzone Team