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Engine Air Filter Replacement
 
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Pelican Technical Article:

Engine Air Filter Replacement

Nick Czerula

Time:

30 minutes30 mins

Tab:

$20

Talent:

**

Tools:

Flathead screwdriver

Applicable Models:

BMW Z3 (1996-02)

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 airflow 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 Z3. 

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 are 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.

Models with 4-cylinder engine:
Models with 4-cylinder engine - The air filter is located the air filter housing, it is mounted in the right side of the engine compartment.
Figure 1

Models with 4-cylinder engine - The air filter is located the air filter housing, it is mounted in the right side of the engine compartment.

Models with 4-cylinder engine - Using a flathead screwdriver, loosen the secondary air pump inlet hose clamp (green arrow).
Figure 2

Models with 4-cylinder engine - Using a flathead screwdriver, loosen the secondary air pump inlet hose clamp (green arrow).

Models with 4-cylinder engine - Then remove the secondary air inlet hose from the air filter housing by pulling it straight off (green arrow).
Figure 3

Models with 4-cylinder engine - Then remove the secondary air inlet hose from the air filter housing by pulling it straight off (green arrow).

Models with 4-cylinder engine - Next you will unclip the three air filter housing retaining clips (green arrows).
Figure 4

Models with 4-cylinder engine - Next you will unclip the three air filter housing retaining clips (green arrows). One of the clips was hidden beneath the secondary air inlet hose. You will have to reach in behind air filter housing to access it.

Models with 4-cylinder engine - Once you release all the clips, lift the air filter housing lid up and remove the air filter.
Figure 5

Models with 4-cylinder engine - Once you release all the clips, lift the air filter housing lid up and remove the air filter.

Models with 4-cylinder engine - I suggest cleaning any debris (green arrow) from the air filter housing once the filter is removed.
Figure 6

Models with 4-cylinder engine - I suggest cleaning any debris (green 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. Install the new filter; be sure it is properly seated. Then install housing lid and clip it in place. Install secondary air hose and tighten clamp.

Models with 6-cylinder engine:
Models with 6-cylinder engine - The 6-cylinder engine air filter housing is located in the left side of the engine compartment (green arrow).
Figure 7

Models with 6-cylinder engine - The 6-cylinder engine air filter housing is located in the left side of the engine compartment (green arrow). The air filter is mounted in a removable panel, this makes replacing it quite easy.

Models with 6-cylinder engine - Press the air filter lid retaining tabs in to release (green arrows).
Figure 8

Models with 6-cylinder engine - Press the air filter lid retaining tabs in to release (green arrows).

Models with 6-cylinder engine - Once released, slide air filter lid up and remove from housing.
Figure 9

Models with 6-cylinder engine - Once released, slide air filter lid up and remove from housing.

Models with 6-cylinder engine - Remove air filter from lid, install new filter and reinstall lid.
Figure 10

Models with 6-cylinder engine - Remove air filter from lid, install new filter and reinstall lid. Be sure retaining tabs lock into place.

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Comments and Suggestions:
luigi Comments: z3 1900 118 cv 8 valves: be careful because the clips are not 3 but are 4; one can not see because it is close to the mass air flow sensor
June 19, 2016
  Followup from the Pelican Staff: Thanks for the additional info and feedback. We appreciate it.
- Nick at Pelican Parts
 

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Page last updated: Wed 12/7/2016 02:07:34 AM