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Cabin Air Filters - how often? #3227425
12/25/13 02:17 PM
12/25/13 02:17 PM
Joined: May 2003
Posts: 9,200
Fayetteville, NC
97tbird Offline OP
97tbird  Offline OP
Joined: May 2003
Posts: 9,200
Fayetteville, NC
How often should one change CAFs?
My BMW has 42k now on the factory CAF.
(It's one of those charcoal activated ones that filter not only air but also detects odors/pollutants, etc and switches on recirc when the climate control is on auto mode).

(I noticed that inside windows have been fogging up quite often recently...and while reading about CAFs, I noticed one article where it said that it CAN be a sign of the CAF has run its useful course ... )

Is it time? The OEM CAF (made by Corteco Micronair) is on sale right now for $28 shipped...

Wonder if I should go ahead and do it? (5 min job, looks like)


Sufficiently Caffeinated...
Cars: 1997 Thunderbird v8 sports(sold), 2003 Elantra GLS, 2005 BMW 330Ci ZHP, 2014 Mazda 6 Touring
Re: Cabin Air Filters - how often? [Re: 97tbird] #3227433
12/25/13 02:26 PM
12/25/13 02:26 PM
Joined: May 2013
Posts: 488
Ohio
actionstan Offline
actionstan  Offline
Joined: May 2013
Posts: 488
Ohio
My kia calls for a new one every 15,000 miles, seems like a short interval but I do it anyways. I would just go by what ever your owner manual says.


1999 Saturn SL1
2013 KIA Forte
Re: Cabin Air Filters - how often? [Re: 97tbird] #3227435
12/25/13 02:26 PM
12/25/13 02:26 PM
Joined: Nov 2009
Posts: 807
Oaxaca, Mexico
Cardenio327 Offline
Cardenio327  Offline
Joined: Nov 2009
Posts: 807
Oaxaca, Mexico
You only really need to change it if airflow is reduced or if you are getting funny smells.

My Honda's factory filter was so cheesy and flimsy that it only lasted 2 or 3 months before it began to stink. At the dealer they want $35 for a new one, so I've never bought one. Either run without or use pieces cut out of a $4 furnace filter (which only last a month). Last month I bought a activated carbon filter for an A4 for $14 and cut it to length. So far so good but I don't expect to get more than 6 months out of it as filthy as the air is here.


'08 Honda C90ST Super Cub 15w-40 mixture of Delvac & Rotella
'08 Honda NX4 Falcon 5w-40 Delo 400LE
'09 Honda Fit LX 0w-20 PP
Re: Cabin Air Filters - how often? [Re: 97tbird] #3227438
12/25/13 02:29 PM
12/25/13 02:29 PM
Joined: Oct 2002
Posts: 22,161
Colorado Springs
Drew99GT Offline
Drew99GT  Offline
Joined: Oct 2002
Posts: 22,161
Colorado Springs
I've found they load up quicker than the engine air filter, depending on the HVAC system design.

Re: Cabin Air Filters - how often? [Re: 97tbird] #3227443
12/25/13 02:31 PM
12/25/13 02:31 PM
Joined: Apr 2006
Posts: 19,528
Lake Forest, CA
HTSS_TR Offline
HTSS_TR  Offline
Joined: Apr 2006
Posts: 19,528
Lake Forest, CA
For some reasons unknown to me the cabin air filter is usually clogged up earlier than engine air filter in all my cars. The air flow from the vents is reduced quite a bit after cabin air filter is in used for 30-35k miles, at the same mileage the engine air filter is barely dirty.

If you can remove the cabin air filter easily you should do it to inspect and tap the dirty side lightly on hard surface to remove the loose dirt, leaves, bugs ... then reinstall while waiting for the new one.


'00 MB E430
'04 Honda S2000
'06 Volvo V70
'14 Honda Accord LX
"Throwing food away is like stealing it from the poor and hungry" Pope Francis
Re: Cabin Air Filters - how often? [Re: 97tbird] #3227455
12/25/13 02:43 PM
12/25/13 02:43 PM
Joined: May 2011
Posts: 593
TX - TEXAS
walk23 Offline
walk23  Offline
Joined: May 2011
Posts: 593
TX - TEXAS
My Nissan calls for changes every 15,000 miles.


2005 F-150
5w20 PP/ FU XG-2
2013 Nissan 2.5 Altima SL
0W20 PP GTL/ FU7317
Re: Cabin Air Filters - how often? [Re: 97tbird] #3227466
12/25/13 02:49 PM
12/25/13 02:49 PM
Joined: May 2003
Posts: 9,200
Fayetteville, NC
97tbird Offline OP
97tbird  Offline OP
Joined: May 2003
Posts: 9,200
Fayetteville, NC
Thanks for all replies.

It's not that bad that I can't wait for the new one (Actually ordered one after I started this thread it as the sale is for a limited time, so it should be here soon).

I guess with 42k miles on the factory one, and as it seems most of you guys' cars call for 15-20k mile intervals, it's probably not overkill to change now.

EDIT: found out that BMW also calls for every 15k CAF changes apparently.


Sufficiently Caffeinated...
Cars: 1997 Thunderbird v8 sports(sold), 2003 Elantra GLS, 2005 BMW 330Ci ZHP, 2014 Mazda 6 Touring
Re: Cabin Air Filters - how often? [Re: 97tbird] #3227476
12/25/13 02:56 PM
12/25/13 02:56 PM
Joined: Sep 2012
Posts: 2,221
London, England
bigjl Offline
bigjl  Offline
Joined: Sep 2012
Posts: 2,221
London, England
I am fairly certain that they are becoming an annual replacement on many cars.

I think it is annual on the Jag.

I will admit that i bought one for the Clio but haven't changed it yet.

Been in the garage for 2 years.

I think i will buy a new one and change it when the weather warms up

I used to change the cabin filter whenever i bought a used car from auction. Part of my post purchase catch up maintenance.


16 S350d LWB 25k Mobil Super 3000 XE 5w30
17 Smart ForFour Auto 6.5k Mobil 1 0w40 FS
Re: Cabin Air Filters - how often? [Re: 97tbird] #3227483
12/25/13 03:00 PM
12/25/13 03:00 PM
Joined: Aug 2013
Posts: 659
MEMPHIS, TN
CHARLIEBRONSON21 Offline
CHARLIEBRONSON21  Offline
Joined: Aug 2013
Posts: 659
MEMPHIS, TN
Change mine after every spring, when it has collected all the pollen and stuff. Usually pretty dirty.


'13 Fusion Hybrid: 5w20 PUP/FU
'15 Civic Si: 0W20 PPPP/FU
'16 Fusion Hybrid: FF
'14 Odyssey: 0w20 PUP/FU
'93 Civic: 5W30 M1/TG
'99 SVT Cobra: 5W30 M1/FU
Re: Cabin Air Filters - how often? [Re: 97tbird] #3227484
12/25/13 03:00 PM
12/25/13 03:00 PM
Joined: Jul 2004
Posts: 12,027
Middlesex County CT
simple_gifts Offline
simple_gifts  Offline
Joined: Jul 2004
Posts: 12,027
Middlesex County CT
Pays to inspect, as I found out years ago.

http://www.bobistheoilguy.com/forums/ubb...CAF#Post1941862


2004 Prius; 97K ML Syn 5W-30
2007 Yaris 71K 0w-40 Castrol
2006 B2300;130K;ALM


Was driving an ox cart; Now on the USS Enterprise
Re: Cabin Air Filters - how often? [Re: 97tbird] #3227556
12/25/13 04:37 PM
12/25/13 04:37 PM
Joined: Dec 2003
Posts: 9,800
Florida, Cape Coral
Eddie Offline
Eddie  Offline
Joined: Dec 2003
Posts: 9,800
Florida, Cape Coral
1 to 3 years depending on the amount of polution is your area.

Last edited by Eddie; 12/25/13 04:37 PM.

CX5 Touring 2.5L :-)
Re: Cabin Air Filters - how often? [Re: 97tbird] #3227692
12/25/13 07:32 PM
12/25/13 07:32 PM
Joined: Aug 2010
Posts: 12,903
Northern Kentucky
901Memphis Offline
901Memphis  Offline
Joined: Aug 2010
Posts: 12,903
Northern Kentucky
Mine can be pretty dirty after 1 year but i try to do it at least every 2 year after spring.


2012 Chevy Cruze LT 1.4T - 50k
2002 Buick Century 130k - Built 4T65e(Maxlife) - Edge 0w40 + Fram XG3980
Re: Cabin Air Filters - how often? [Re: actionstan] #3227732
12/25/13 08:44 PM
12/25/13 08:44 PM
Joined: Mar 2010
Posts: 99
STL Area
Deamos Offline
Deamos  Offline
Joined: Mar 2010
Posts: 99
STL Area
Originally Posted By: actionstan
My kia calls for a new one every 15,000 miles, seems like a short interval but I do it anyways. I would just go by what ever your owner manual says.


I do the same, and after seeing the condition of my Sorento's filter at about 15k miles, its probably an okay idea. Plus I was noticing weird smells, after replacing the filter air coming out the vents was nice and fresh again.




Last edited by Deamos; 12/25/13 08:45 PM.

2013 Kia Sorento EX V6
Re: Cabin Air Filters - how often? [Re: 97tbird] #3227850
12/25/13 11:22 PM
12/25/13 11:22 PM
Joined: Nov 2008
Posts: 587
Cincinnati, OH
nleksan Offline
nleksan  Offline
Joined: Nov 2008
Posts: 587
Cincinnati, OH
I asked my friend, retired BMW Master Mechanic running his own indy shop now, and he said:
"I have seen too many people either neglect their cabin filter, or not even realize it exists, and the result is far too often that the blower motor resistor fails. One could argue correlation vs causation, but in 30+ years, I've only seen that resistor fail twice on cars that had their cabin filter changed at reasonable intervals, and I couldn't even begin to tell you how many issues I've seen from it not being touched..."


00 328Ci(419rwhp/392rwtq) RL/Motul/OS Giken
06 M3 ZCP/6MT - RL
01 325i - RL/RP
03 M5 - RL
88 M6 (Eu) - RL
95 M5 (Eu) - RL
Re: Cabin Air Filters - how often? [Re: 97tbird] #3228466
12/26/13 05:22 PM
12/26/13 05:22 PM
Joined: Jan 2005
Posts: 283
Central Kansas
JPP Offline
JPP  Offline
Joined: Jan 2005
Posts: 283
Central Kansas
In my Silverado....... every spring.
I get them on good sales so no big deal. I like the clean/fresh air and
it is a 5 minute chore.
In my Son's Altima.... every two years. He see's less dirt roads.
It is amazing how nasty these things can get even after a year.

YMMV

JP


2002 Silverado 1500 4X4 5.3L (Mine)
2004 Trailblazer 4.2L (Wife)
1999 Altima (Son #1's car)
2006 Ford Fusion (Daughter in Law's car)
1999 Maxima (Son #2's car)
2015 KLR 650
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