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Old 11-07-2006, 09:29 AM   #1
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Cabin air filter install yes/no?

Does the focus have a cabin air filter? I haven't had a chance to dig into this car yet but if it doesn't have one has anyone installed one trying to improve air quality/smell with a hepa or other high quality coal filter?

Where are the intake vents for the focus anyway?


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Old 11-07-2006, 09:42 AM   #2
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If it doesnt, you can easily install it yourself. It just takes the place of the fresh air inlet grate under the passenger side cowling. I did it just because those filters do a very good job filtering the outside air. Its a Motorcraft FP-41
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Old 11-07-2006, 09:46 AM   #3
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In 05 Ford decided that Focus owners should have to deal with dust and pollen from the vent and replaced the cabin air filter holder with a simple wire mesh that's spaced so that mosquitos can easily fit through it. It's also installed with a foam glue similar to Great Stuff window and door sealer that is VERY difficult to remove. The filter, if you can call it that, is located under the passenger cowl cover.

You will need to locate an earlier model Foci in a junkyard that will allow you to pull your own parts. Take a chisel, hammer, both screwdrivers, and a pair of pliers or 10mm deep well. Remove the old cabin air filter assembly. Throw away filter which is probably moldy and smells like the rags under the kitchen sink. I suggest cleaning the assembly with bleach and water to kill any mold. Removing the screen on your car will be more difficult, but you should have learned how to remove the cowl cover, and I would also practice removing the firewall plastic on the junkyard car also because you will need to remove it on your car so that you can chisel away the foam glue.

Keep "Quality is Job 1" in the back of your head when you're looking at the hole that Ford cut in the cowl to allow air into the cabin.

Home Depot or Lowes sell foam rubber insulation with adhesive backing in the door section which is what I'd suggest to replace the foam glue. This will make it easier to remove the assembly later if you need to clean mold off it. I'd try to keep the insulation in one piece so that you only have one gap to bother with after the install. I'd also use a silicon caulk around the outside of the installed insulation for added protection. I would not caulk the assembly so that it couldn't be removed. From what I've read from other FF's, the cabin air filter assembly installs in the same location with the same hardware as the 05+ chicken wire screen.

Some FF's with filters have reported mold grows on the filter, so check your filter periodically.
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Old 11-07-2006, 09:55 AM   #4
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This is interesting, i didnt know that^^^^
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Old 11-07-2006, 10:00 AM   #5
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My bad, i just did a little research, it says in my Ford computer that vehicles built after 3/3/04 cannot be fitted with the cabin filter. Like he said^^^ you will need to get the old setup off of a salvaged car. Or get the pieces new.
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Old 11-07-2006, 10:01 AM   #6
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That's one thing they should really change with the remodel. I think it's also a good suspect for why I seem to hear more air in the 05 than I did in the 03 I drove around for 3 months (rental) which was more quiet than the high priced weak ass gas guzzling Trailblazer the company put me in for a couple of weeks. The other guys on my team thought I was weird for wanting to take the stupid SUV back for my Focus sedan. I just couldn't fit electrical material in the Focus.
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Old 06-07-2011, 08:57 PM   #7
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So this may sound like a dumb question... BUT, what if you just put the paper filter on top of the chicken wire +05 filter?
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Old 06-07-2011, 10:45 PM   #8
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In the older ones, there's a plastic snap-in screen where the filter would go, you just snap it out. On the newer ones, it will be a major effort to remove it.

There's not much clearance to get at the filter... it needs changed MORE often than the engine's air filter... it gets REALLY dirty.

My fav is the Hastings.
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Old 06-08-2011, 05:35 AM   #9
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Just put a filter in my 03...had none as I found out. Remove the plastic screen...push in the pleated paper/charcoal filter....not a lot of room.

Next time I will just glue some Honeywell pre-filter material on top of the plastic screen and just vacuum it or wash it and use it again.
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Old 08-08-2014, 02:54 PM   #10
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Just put a filter in my 03...had none as I found out. Remove the plastic screen...push in the pleated paper/charcoal filter....not a lot of room.

Next time I will just glue some Honeywell pre-filter material on top of the plastic screen and just vacuum it or wash it and use it again.

How did that work out for you? I just bought the air filter and realized my air filter cover is glued down as well. Trying to.figure out if it's worth it or not
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