StephenWanders
New member
I will first disclose I understand that any Toyota part with YZZ is considered the OEM Toyota budget version of any Toyota part. The problem is, here in the USA most dealerships are saying that the 17801-YZZ13 is the only engine air filter option available and you can't get the OEM factory 17801-38051. After I did my last oil change the dealership I usually go to gave me the YZZ13 and I went on my way. But after I pulled my old filter out I noticed major visual differences. I didn't have the time to fuss about it and assured myself a Toyota part is made to a set standard and this will work just fine. Visual difference is the 17801-38051 is almost twice as thick and has a pre-filter pad on the element itself. The 17801-YZZ13 is half as thick and doesn't come with the pre-filter pad. Again I didn't dive into this rabbit hole at the moment. As time went on it bugged me so below are my findings! I just want to make sure that whatever filtration I get from the dealership I am picking the better version, or at least that is my assumption. From my research the OEM factory version has the pre-filter pad to help with debris in dusty climates and apparently the western USA doesn't meet that need, hence the thin OEM budget version.
Called three local dealers here in Denver. Two of them do not sell the 17801-38051 and will only sell the 17801-YZZ13. (Double checked with the dealership I usually buy from) Luckily the third one either had back stock or still gets them in. Parts guy said, “You can get any part in the YZZ budget but we can also source true factory parts.” So that was reassuring that Toyota still has them out there. You will have to find a place that does that. I picked up 2 today just in case they do not stock in the future. Also to note the YZZ13 is $1 cheaper, so much for a budget version haha.
Since I had a YZZ13 in my air box I figured I would do some measuring to figure out if more pleats = more surface area. While doing this I was surprised with what else I found. Hope this helps people out if they are traveling to the US or is in the US with a Toyota that has the 4.0L 1GRFE.
17801-YZZ13: USA Denso
- pleats: 131
- pleat dimensions: w- 8.6563” h- 1.0938”
- Filter surface area formula (SA=(w*h)*(pleats*2)) pleat count is each tip. Air is sucked through both faces of pleat hence why pleat number is multiplied by 2.
- Filter surface area: 2,480.557 in^2
Things I noticed about this filter are:
- gasket has a lot of porosity and seems to be a softer durometer.
- very flexible filter (torsional rigidity)
- air box clips, clip on loosely
- Gasket thickness (0.427”)
- Filter media seems to be the same as OEM Factory filter. No way for me to actually test it.
17801-38051: Japan Denso Factory Filter
- pleats: 107
- pleat dimensions: w- 8.6563” h- 1.875”
- Filter surface area formula (SA=(w*h)*(pleats*2)) pleat count is each tip. Air is sucked through both faces of pleat hence why pleat number is multiplied by 2.
- Filter surface area: 3,473.320 in^2
Things I noticed about this filter are:
- gasket has no porosity and is very smooth. Also seems to be a harder durometer.
- very stiff filter (torsional rigidity)
- air box clips, clip on very tight
- Gasket thickness (0.427”)
- Filter media seems to be the same as OEM USA filter. No way for me to actually test it.
Called three local dealers here in Denver. Two of them do not sell the 17801-38051 and will only sell the 17801-YZZ13. (Double checked with the dealership I usually buy from) Luckily the third one either had back stock or still gets them in. Parts guy said, “You can get any part in the YZZ budget but we can also source true factory parts.” So that was reassuring that Toyota still has them out there. You will have to find a place that does that. I picked up 2 today just in case they do not stock in the future. Also to note the YZZ13 is $1 cheaper, so much for a budget version haha.
Since I had a YZZ13 in my air box I figured I would do some measuring to figure out if more pleats = more surface area. While doing this I was surprised with what else I found. Hope this helps people out if they are traveling to the US or is in the US with a Toyota that has the 4.0L 1GRFE.
17801-YZZ13: USA Denso
- pleats: 131
- pleat dimensions: w- 8.6563” h- 1.0938”
- Filter surface area formula (SA=(w*h)*(pleats*2)) pleat count is each tip. Air is sucked through both faces of pleat hence why pleat number is multiplied by 2.
- Filter surface area: 2,480.557 in^2
Things I noticed about this filter are:
- gasket has a lot of porosity and seems to be a softer durometer.
- very flexible filter (torsional rigidity)
- air box clips, clip on loosely
- Gasket thickness (0.427”)
- Filter media seems to be the same as OEM Factory filter. No way for me to actually test it.
17801-38051: Japan Denso Factory Filter
- pleats: 107
- pleat dimensions: w- 8.6563” h- 1.875”
- Filter surface area formula (SA=(w*h)*(pleats*2)) pleat count is each tip. Air is sucked through both faces of pleat hence why pleat number is multiplied by 2.
- Filter surface area: 3,473.320 in^2
Things I noticed about this filter are:
- gasket has no porosity and is very smooth. Also seems to be a harder durometer.
- very stiff filter (torsional rigidity)
- air box clips, clip on very tight
- Gasket thickness (0.427”)
- Filter media seems to be the same as OEM USA filter. No way for me to actually test it.