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Cabin Microfilter Replacement
 
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Pelican Technical Article:

Cabin Microfilter Replacement

Nick Czerula

Time:

30 minutes30 mins

Tab:

$30

Talent:

*

Tools:

Lint free rag

Applicable Models:

BMW X5 (2000-06)

Parts Required:

Cabin microfilter

Hot Tip:

Thoroughly clean the microfilter housing

Performance Gain:

Good air flow through HVAC system

Complementary Modification:

Install charcoal activated filter

BMW E53 X5 models utilize an HVAC fresh air cabin microfilter. The microfilter helps eliminate dirt and dust particles from entering the vehicle interior. It also protects HVAC system components from contamination. A dirty heater core would not provide sufficient heat and a dirty evaporator would not provide sufficient cooling. The microfilter is located in the wiper cowl area beneath a lid. BMW recommends replacing the fresh air cabin microfilter every 10,000 miles or every other oil change. In this article, I'll go over the steps involved with changing the cabin microfilter. It is quite easy and can be done in a few minutes.

The cabin microfilter is located at the center of the wiper cowl, behind a lid (green arrow).
Figure 1

The cabin microfilter is located at the center of the wiper cowl, behind a lid (green arrow).

Working at the wiper cowl, rotate each retainer (green arrows) 90° counterclockwise to disengage.
Figure 2

Working at the wiper cowl, rotate each retainer (green arrows) 90 degrees counterclockwise to disengage. Then pull them away from the cowl to be sure they are disengaged. If one comes out, as shown here (inset), this is OK, they can be reinstalled when reassembling.

With the lid open, remove the microfilter from the housing by sliding it out toward the engine.
Figure 3

With the lid open, remove the microfilter from the housing by sliding it out toward the engine.

Clean any debris (green arrow) from microfilter housing, this will prevent premature filter failure.
Figure 4

Clean any debris (green arrow) from microfilter housing, this will prevent premature filter failure. Next, slide new microfilter into place, then install lid and fasteners. Be sure to properly align microfilter lid. If misaligned, water can leak into your vehicle.

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Page last updated: Wed 12/7/2016 02:24:14 AM