E52 Air Filter Change (K&N 3320312)

I have been driving my E52 a year now and thought that I really should get around to doing some service items on it. First up, the air filter which I have found out is the same as the one used in the earlier E51 model.  After searching online I decided that I would try the K&N air filter which in theory lasts the life of the car.  It is washable so should never need replacing again.  It does also claim to improve performance but that feels like it might be one those typical claims, and not sure you need a few extra horses on a V6 van.  K&N 3320312 is the filter you need which is this:


On the E52 you can simply unclip the air filter housing which is located at the back of the engine bay.  One clip each side and the cover lifts up enough to remove and replace the filter.



I have driven the car about 200 miles since fitting the filter and it doesn't seem to negatively affect the acceleration.  I am not sure I can feel an improvement, but you never know. 😁

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