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      09-17-2011, 03:51 PM   #1
Dackelone
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Drives: N54 e82
Join Date: Feb 2010
Location: Bayern, Germany

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Exclamation 135i air filter replacement DIY...

I just wanted to change out my air filter after 35K miles on my 135i N54. It was really a piece of cake. You just unclip the five spring clips around the air filter box with a flat blade screw driver, pull the lid up and out - and replace the paper filter element. There were a lot of small stones and sand inside my air filter housing. Just think if I had some K&N gauze type air filter that was more pourous and let the sand and rocks into the engine! wow. I used a small shop vac to clean up my filter housing. Then I installed a new filter. I used an OEM Mahle filter - I believe they make the filters for BMW AG. Same quality as BMW's filters for a 1/3 of the cost.


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sand, dirt, small rocks were just some of the things I found inside my filter box...
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would you look at all the junk that gets push up to the air filter!!
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