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Engine air filter OEM vs replacement

Discussion in '5th Gen 4Runners (2010-2024)' started by roymm, Aug 19, 2022.

  1. Aug 26, 2022 at 9:29 AM
    #31
    hvac guy

    hvac guy New Member

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    Not sure if it's cheaper for Toyota to produce the smaller filter in the U.S. or maybe import issues or price for the larger one that's made in Japan? Who knows. I know I tried buying the larger filter at 2-3 different dealers online, all said " 17801-38501 no longer available, yzz13 is the replacement". So if some of you guys are able to get the 17801-38501, then i would get a couple of them while your able to do so.
     
  2. Aug 26, 2022 at 5:52 PM
    #32
    lrizzo

    lrizzo New Member

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    I installed the AEM. It fit perfectly.
     
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  3. Aug 27, 2022 at 11:09 AM
    #33
    4runGirl88

    4runGirl88 Get a little mud on the tires!

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    Same here.
     
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  4. Sep 5, 2022 at 6:01 AM
    #34
    POWERPLANTHOMER

    POWERPLANTHOMER New Member

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    I order off the Amazon, the OEM ones are the Denso OEM. Also here in the Springs, never tried the dealer. I order from the same place on the Amazon. I also order the cabin air filters with the activated carbon, for Lexus. The dealer won’t sell me them. Lots of editing, just got off work this morning.
    87139-50100
     
    Last edited: Sep 5, 2022
  5. Sep 5, 2022 at 7:36 AM
    #35
    Toyotafvr

    Toyotafvr New Member

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    Ok just getting back to everyone on my findings .After receiving the 17801-38051 filter the first thing I noticed was it was only very slightly thicker . It did have the refilter . Also the 38051 is a Denso and made in Japan and the yzz13 is also a Denso but made in USA. As for MPG , no difference at all . Truck runs the same as the yzz13. So other then the prefilter they look and preform the same. My 2 sense is if I can get my hands on the 38051I will go with it only because of the prefilter otherwise I will get the yzz13.

    Edit : Not sure why the OP's filter looks so much thicker . The ones I got are OEM from the dealer . Same stamping on the side of my filters as the OP. Not sure what to think about that ?!?!
     
    Last edited: Sep 5, 2022
  6. Sep 5, 2022 at 8:20 AM
    #36
    McSpazatron

    McSpazatron New Member

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    Are you saying that you received a new 38051 filter, but it’s only slightly thicker than the Yzz13? Any side by side pictures?

    If so, that is very surprising, because the thickness just the filtering media of the 38051 (or aftermarket equivalents) is twice as much as the Yzz13.
     
    Last edited: Sep 5, 2022
  7. Sep 5, 2022 at 8:23 AM
    #37
    Toyotafvr

    Toyotafvr New Member

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    That is exactly what I am saying ! I do not have any pictures. Sorry ! I even had my wife look at them sitting side by side on the kitchen counter and she even said that they look the same a part from the prefilter . I am confused!
     
  8. Sep 5, 2022 at 8:40 AM
    #38
    McSpazatron

    McSpazatron New Member

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    Well that’s weird lol. I guess that means aftermarket equivalents are going to the only option for those of us wanting the thicker (more luxurious :p) filters.

    I’m sure this wont be an actual issue in terms of functioning or protection though. The only thing I can imagine is that the thinner filters have a reduced total capacity for filtering, which just means it would have to be changed more often. I bet the original thick one were in there for the benefit of owners in countries/locations where replacement parts are harder to come by.
     
  9. Sep 5, 2022 at 8:41 AM
    #39
    Toyotafvr

    Toyotafvr New Member

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    Here you go . I found the one I took out . The one I took out I had bought from the dealer . If you look at the one on the right in my picture and look at the one on the right of the OPs they are a different color. Makes me wonder if they didn't change the way they are making them as well ?!?!

    20220905_083529.jpg
     
    Last edited: Sep 5, 2022
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  10. Sep 5, 2022 at 11:34 AM
    #40
    taco_runner

    taco_runner New Member

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    The OEM has more surface are necause it has more folds. I once bought a Denso one being they make the OEM version, but the OEM was sturdier and had more folds.
     
  11. Sep 7, 2022 at 6:56 PM
    #41
    McSpazatron

    McSpazatron New Member

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    ok, unless Im missing something, your YZZ13 is different than my YZZ13. In fact, it’s pretty much exactly like the 38501. Im confuzled…:confused:
     
  12. Sep 7, 2022 at 7:06 PM
    #42
    nimby

    nimby in the drink

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    The thinner filters have more pleats.

    Doesn't more pleats = more surface area for filtration?
     
  13. Sep 8, 2022 at 4:29 AM
    #43
    Toyotafvr

    Toyotafvr New Member

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    OOOH . Well that make more sense then . So really they filter the same . One has the refilter and the other has more pleates ? Thank for that nimby !
     
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  14. Oct 31, 2022 at 8:49 AM
    #44
    topdec

    topdec New Member

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  15. Oct 31, 2022 at 8:55 AM
    #45
    LuLu

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  16. Oct 31, 2022 at 9:00 AM
    #46
    topdec

    topdec New Member

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    Thanks for the link. I'll use it in the future. Unfortunately, I think this 17801-38051 filter is discontinued.

    The good thing is that the Amazon seller is a lexus dealer so hopefully the item is genuine. They do have a 89% positive rating, which is low. We'll see.


    upload_2022-10-31_10-58-39.jpg
     
  17. Nov 12, 2022 at 10:35 AM
    #47
    topdec

    topdec New Member

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    The filter I just bought online from a Lexus dealership via Amazon looks to be an exact match with the old filter. But I’m no expert. What do you think?

    77B97B46-9ED2-4C3E-9B9B-D67D3945FD16.jpg
     
    Last edited: Nov 12, 2022
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  18. Nov 13, 2022 at 9:51 AM
    #48
    mrmike7189

    mrmike7189 New Member

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    I have the NAPA gold & Fram air filters and they look like the OEM ones with the extra foam layer. They both cost less than toyota too.:D
     
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  19. Nov 13, 2022 at 10:19 AM
    #49
    Overland WT

    Overland WT Grumpy Old Guy

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    I've run K&N in a lot of vehicles, never had an issue with intake or MAP sensor being dirty or oily, but I don't usually keep vehicles very long either. After reading about a lot of other people's issues I chose the AEM dry filter. Same thickness as the 17801-38051 filter and fit the box perfectly. I like the environmental part of reusable, but the fact I just need to blow it out vs carrying a spare with me on long long dirty trips is appealing too. Also used Wix for the cabin. Uber dusty here so I change it twice a year.

    The other thing to remember, and the main reason there has been such an explosion of fake Toyota products... supply chain in 2020/21. The TRD Pro air filter couldnt be found anywhere and dealers were advised to use the standard air box filter in its place since there were so many more in the supply chain.
     

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