Delete or not to delete life time air filter

Maintenance/Repairs
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21

It came with the life time air filter. But the gauge is missing to determine if its time to replace.

22

Iā€™d get rid of that K&N filter kit and install this in its place.

Then youā€™ll be good for another 100,000 miles. If the car lasts that long.

Tester

23

There is no K&N filter.

1 Like
24

It came with the life time air filter. But the gauge is missing to determine if its time to replace.
I dont have any aftermarket filter installed

25

If there were a air filter pressure drop gauge, it would be mounted on the filter housing and look something like this.

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image675Ɨ1163 52.4 KB

Yours didnā€™t come with one.

Tester

1 Like
26

Since that pressure gauge is missing, maybe and hopefully one of the previous owners did an upgrade like on this video. It seems that the top box is not where the filter goes, it has another box on the bottom attached to it. As seen in the video. Ill take a look today.

27

Why do you think you need to replace it now? Is it running OK? Some folks have had no problems for 200,000+ miles on theirs, it just depends how much dirt it has collected, which varies widely.

1 Like
28

Because I live in the dessert, lots of dust and dust storms in the summer. No gauge to let me know whats going on so i want my engine to last. Just recently got this car and need it. After discovering a couple things idk if i can get my money back. So might as well prevent it for having major mechanical issues.

29

Thatā€™s filter/housing is for a 2005-2007 Focus.

Yours is a 2009 with PZEV emissions.

Tester

31

Before making any changes to the carā€™s configuration, suggest to ask CARB if thatā€™s allowed. You donā€™t want to find out later the state (presumably Calif) wonā€™t allow you to renew the registration.

Knucklehead diyā€™er opinion, no 2009 Focus experience, Calif resident.

32

Here in AZ is ok

33

It is way past time to stop posting that ridiculous statement that does not help at all .

7 Likes
34

Hey sorry to bother but did you check and see if your focus came with that gauge? I read previous ford focus manuals, 07 and 08, and the gauge its mentioned, but on my 09 its not. So I wonder if they didnt include that feature in the 09 and current models.

35

@Georgefocus2
There seems to a lot written on this over at

36

My 2011 MKZ hybrid does not have the gauge, the owners manual says the check engine light will go on indicating a problem, to take it to the dealer at that point. So if I had your car Iā€™d drive it until the light comes on.

1 Like
37

My owners manual doesnā€™t say anything about the light. I guess ill just leave it like that. I dont want to mess around with the codes of this PVEZ system.

38

Think about it this way, if the vehicle is running OK, the air filter is fineā€¦

39

Kind of ironic that a part thatā€™s supposed to only be needed 10-15 years after the car is made isnā€™t available. Kind of makes the life of the car equal to the life of the filter.

40

I suspect there is little demand for PZEV original equipment replacement air cleaners, therefore the part was canceled.

Rock Auto lists 2 suppliers offering new air cleaner housings (out of stock) that fit the Focus without PZEV engine. It probably works as a good substitute for the PZEV filter but is an emission modification that canā€™t be suggested by the retailer.