Review on K&N Engine Air Filter: High Performance, Washable, Replacement for 2009-2017 BMW (520i, 528i, Z4 sDrive 18i, Z4, Z4 sDrive 20i, Z4 sDrive 28i, 528i xDrive, X1, X1 20i) - Model 33-2963 by Darrell Kiley

Name: K&amp;N Engine Air Filter: High Performance, Washable, Replacement for 2009-2017 BMW (520i, 528i, Z4 sDrive 18i, Z4, Z4 sDrive 20i, Z4 sDrive 28i, 528i xDrive, X1, X1 20i) - Model 33-2963
Item: K&amp;N Engine Air Filter: High Performance, Washable, Replacement for 2009-2017 BMW (520i, 528i, Z4 sDrive 18i, Z4, Z4 sDrive 20i, Z4 sDrive 28i, 528i xDrive, X1, X1 20i) - Model 33-2963
Rating: 5

September 16, 2022

Noticeable and immediate improvement in acceleration.

I bought this filter for my 2013 X1 and immediately felt the improvement and speed up. The car breathes better and the fuel consumption seems to be a bit better. The filter is washable and reusable, so it pays for itself in the long run. I recommend checking the filter every 10,000 km. Depending on driving conditions and location, it may look clean or dirty. I washed and re-greased mine recently and it took about 45 minutes. After washing and changing the oil, the filter looked like new.

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