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Engine Air Filter Replacement
 
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Pelican Technical Article:

Engine Air Filter Replacement

Nick Czerula

Time:

10 minutes10 mins

Tab:

$20

Talent:

**

Tools:

Flathead screwdriver

Applicable Models:

BMW Z4 Convertible (2003-06)
BMW Z4 Coupe (2006)

Parts Required:

Engine air filter

Hot Tip:

Work with a cool engine

Performance Gain:

Achieve highest possible gas mileage

Complementary Modification:

Replace dry rotted or cracked intake air ducts

The engine intake air filter is a pleated paper element housed inside a plastic box. The paper is designed to be porous to air flow but prohibit dust particles and grit from entering the engine intake ports. With time and depending on local conditions, the filter element becomes clogged and may eventually slow down or even altogether stop sufficient intake air from entering the engine. If air intake is restricted fuel economy and engine efficiency is reduced; the restriction may reach a point at which the engine does not run at all.

In this article, I'll go over the steps involved with replacing the air filter on the BMW Z4 with a S54 engine. Replacing the air filter on the M54 engine is similar.

Replace the air filter once a year or more frequently if you drive in a dusty area. I suggest checking each time you change your engine oil, assuming you are changing your oil every 5,000 miles. It's easy to remove to inspect it. Replacing it early will help you maintain your maximum fuel economy.

Keep in mind that when your car was serviced before, parts may have been replaced with different size fasteners used in the replacement. The sizes of the nuts and bolts we give may be different from what you have, so be prepared with different size sockets and wrenches.

Protect your eyes, hands and body from fluids, dust and debris while working on your vehicle. If you're working with the electrical system, disconnect the battery before beginning. Always catch fluids in appropriate containers and properly dispose of any fluid waste. Recycle parts, packaging and fluids when possible. Never work on your vehicle if you feel the task is beyond your ability.

Our vehicle may vary slightly from yours as models do change and evolve, as they grow older. If something seems different, let us know and share your info to help other users. Do you have questions or want to add to the article? Leave a comment below. When leaving a comment, please leave your vehicle information.

The air filter is located within the air filter housing (red arrow).
Figure 1

The air filter is located within the air filter housing (red arrow). It is mounted in the left side of the engine compartment.

Start by removing the plastic line clipped to the intake air housing.
Figure 2

Start by removing the plastic line clipped to the intake air housing. Pull the line (red arrow) straight up to remove it from the mounts.

Next, you will unclip the five-air filter housing retaining clips (red arrows).
Figure 3

Next, you will unclip the five-air filter housing retaining clips (red arrows). Lift them up and unhook them from the lid of the intake air housing.

Once you release all the clips, lift the air filter-housing lid up and remove the air filter.
Figure 4

Once you release all the clips, lift the air filter-housing lid up and remove the air filter.

I suggest cleaning any debris (red arrow) from the air filter housing once the filter is removed.
Figure 5

I suggest cleaning any debris (red arrow) from the air filter housing once the filter is removed. Leaves and dirt can gather inside the housing and possibly plug the air filter.

Check to see if the intake air housing emission filter (red arrow) is dirty.
Figure 6

Check to see if the intake air housing emission filter (red arrow) is dirty. I have found quite a few of these full of dirt, especially in higher mileage vehicles. Replace the intake air-housing lid if this filter is damaged or dirty. Do not remove it from the lid and reinstall the lid. See our tech article on intake air ducts and housing replacing. Install the new air filter; be sure it is properly seated. Then install the housing lid and clip it in place.

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Page last updated: Sat 12/3/2016 02:56:02 AM