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Cabin Air Filter Replacement
 
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Pelican Technical Article:

Cabin Air Filter Replacement

Steve Vernon

Time:

30-60 minutes

Tab:

$35 to $50

Talent:

*

Tools:

Short Philips head screwdriver, long flathead screwdriver, 8mm wrench

Applicable Models:

Porsche 993 Carrera (1995-98)
Porsche 993 Carrera 4 (1995-98)
Porsche 993 Carrera 4S (1996-98)
Porsche 993 Carrera S (1998)
Porsche 993 Targa (1996-98)
Porsche 993 Turbo (1996-97)

Parts Required:

Air filters

Hot Tip:

Don't lose the clips

Performance Gain:

Breathing cleaner air

Complementary Modification:

Change engine air filter

Every 10,000 miles or so, you should change the cabin air filters in your Porsche 993. You should change it sooner if you live in a dusty climate or do a lot of driving on non paved roads. The cabin air filters helps protect the air that you breathe inside the car. These filters also collect pollen from the air so if its allergy season you might get a little relief with a new filter. Replacement is a snap and should take less than an hour.

The two filters are located under the hood up by the A-pillars and require removing a few components to access them. The small clips that hold the wiring harness are known to fly off when removing them so use care that you don't lose them.

Begin by opening the hood.
Figure 1

Begin by opening the hood. The two cabin or pollen filters are located under covers on each side under the A-pillars (red arrows).

Pull up and removing the rubber seal on the firewall (red arrow).
Figure 2

Pull up and removing the rubber seal on the firewall (red arrow).

Remove the two Philips head screws (red arrows) and lift the shroud cover up and out.
Figure 3

Remove the two Philips head screws (red arrows) and lift the shroud cover up and out.

Each filter is under the cover (red arrow) in front of the blower motors.
Figure 4

Each filter is under the cover (red arrow) in front of the blower motors. The left and right side use the same procedures with a few exceptions; one being that the right side has an electrical connection on the cover.

The left side cover has a clip that holds the wiring harness in place on all years but the clip was only added to the right side cover in 1996 and forward.
Figure 5

The left side cover has a clip that holds the wiring harness in place on all years but the clip was only added to the right side cover in 1996 and forward.

If you are working on the right side cover begin by pulling the electrical connection apart (red arrow).
Figure 6

If you are working on the right side cover begin by pulling the electrical connection apart (red arrow).

Lift the wiring harness out from the area on the top of the cover (red arrow) and set it out of the way.
Figure 7

Lift the wiring harness out from the area on the top of the cover (red arrow) and set it out of the way.

Use a long flathead screw driver and gently pry the clip away from where it connects to the lower section of the housing (red arrow).
Figure 8

Use a long flathead screw driver and gently pry the clip away from where it connects to the lower section of the housing (red arrow).

Use an 8mm wrench and remove the single screw on the top of the housing (red arrow).
Figure 9

Use an 8mm wrench and remove the single screw on the top of the housing (red arrow).

You can now lift the cover straight up and off the housing.
Figure 10

You can now lift the cover straight up and off the housing.

Removing the old filter is a simple as lifting it straight up and out.
Figure 11

Removing the old filter is a simple as lifting it straight up and out.

Make sure to clean out the air box housing before installing a new filter.
Figure 12

Make sure to clean out the air box housing before installing a new filter.

When you install the new filter it is important that it sits correctly in the groves in the housing (red arrows) with the plastic tap that fits into the cover pointing straight up (yellow arrow).
Figure 13

When you install the new filter it is important that it sits correctly in the groves in the housing (red arrows) with the plastic tap that fits into the cover pointing straight up (yellow arrow). If the filter is not sitting correctly it can make contact with the fan which can cause the fuse to blow and a trouble light to activate. The procedure is the same for the left and right side with the exception of the wiring connection. Installation is the reverse of removal.


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Page last updated: Sun 6/25/2017 03:12:54 AM