Cabin Filter Question

[guinn]

Since we live in a very dusty area, I swapped out the cabin filters in both cars about six months ago. Interestingly, even after several years with the old filters, there did not seem to be much dirt on the filters. I just went to swap them out again, and I don't see any dirt on either of the filters. That seems very strange! Does anyone know if there is an earlier stage filter than the one in the glove box? Any other ideas? (When I say we live in a very dusty area, I mean very dusty. Dirt roads in our subdivision.)

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[tbrumleve]

The cabin filter is the first and only filter for cabin air. 20,000 miles is the recommended change interval. If it’s not dirty yet, put it back and save the new one for later. Mine at 20k was visibly dirty (Portland, OR area, so not much dust / dirt exposure).

 

[load97]

Probably just blow it off a bit with compressed air and put it back in.

 

[guinn]

Thanks for the responses. It still doesn't answer why my filter is clean. If you saw the amount of dust on my cars, and particularly the rear window, just from driving the 2 miles from the house to the main highway you would understand why I think there should be a significant amount of dirt in the filter. In fact, it doesn't even appear that I need a filter!! No dirt, no filter needed.

 

[RickMachE]

Thanks for the responses. It still doesn't answer why my filter is clean. If you saw the amount of dust on my cars, and particularly the rear window, just from driving the 2 miles from the house to the main highway you would understand why I think there should be a significant amount of dirt in the filter. In fact, it doesn't even appear that I need a filter!! No dirt, no filter needed.

Would depend on how much you run the HVAC.

 

[Mach-Lee]

Thanks for the responses. It still doesn't answer why my filter is clean. If you saw the amount of dust on my cars, and particularly the rear window, just from driving the 2 miles from the house to the main highway you would understand why I think there should be a significant amount of dirt in the filter. In fact, it doesn't even appear that I need a filter!! No dirt, no filter needed.

How many miles have you driven on a filter change? Do you live in a rural area with clean air, or an urban area with lots of soot-producing factories and vehicles? Do you drive in traffic a lot or are you the only car on the road? Is the HVAC on all the time while you drive or only sometimes? These will affect your filter's lifespan.

The filter will remain clean driving on a dirt road because the dust is kicked up behind the car, not in front of it. The air is sucked in the gap between the hood and the bottom of the windshield near where the wipers are parked.

I change mine every 15,000 miles and it's definitely somewhat dirty in that timeframe. I drive on freeways in traffic and get behind diesel vehicles regularly.

 

[guinn]

How many miles have you driven on a filter change? Do you live in a rural area with clean air, or an urban area with lots of soot-producing factories and vehicles? Do you drive in traffic a lot or are you the only car on the road? Is the HVAC on all the time while you drive or only sometimes? These will affect your filter's lifespan.

The filter will remain clean driving on a dirt road because the dust is kicked up behind the car, not in front of it. The air is sucked in the gap between the hood and the bottom of the windshield near where the wipers are parked.

I change mine every 15,000 miles and it's definitely somewhat dirty in that timeframe. I drive on freeways in traffic and get behind diesel vehicles regularly.

We don't drive a lot, but I probably put 20K on the 2021 ME before I changed the filter. We are semi-rural, but the roads in our subdivision are dirt. We use HVAC most of the time, but we have it drawing in fresh air. I think your explanation of where the dust is kicked up may be the right answer. I thought about that, but I still thought there would be dirt drawn in regularly. Anyway, thanks for your thoughts.

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