This happened to us with 2023 sienna after a dealers oil change !!! It turns out that they didn't close air intake filter cabin correctly. We were drive up to Canada at the time. We had to stop time to time to stop the warning. Check the air filter cabin and make sure it secure.
Take it to a Toyota dealership and change your own cabin filter (it's the easiest thing to do)
Oh and there was evidence of a rodent’s nest in the cabin filter.
I change my oil+filter every 5k, engine+cabin filter every 15k, and CVT Drain and Fill every 60k (just once so far) and have not noticed anything weird or concerning.
And somehow its 50 to 70 bucks or whatever to change the cabin filter but they already took it out to show me and they put it back.... which is why I change oil myself....
I just did both on my 2005 corolla last week and it was $42 for both parts and 15 minutes of my time. Wpuld jave been $196 at budget near me.
Where I live, my best choices are the Toyota discount charcoal cabin air filter at the parts counter for $44 CAD (#87139-YZZ93, YZZ means "value" or approved 3rd party rebranded as Toyota, only $4 more than aftermarket non-charcoal).
Be wary of Amazon, I ordered genuine Toyota cabin and engine air filters two years in a row, the second year the filter was noticeably lighter, cheaper feeling. I suspect a counterfeit imitation that has only half the filter material
I had them do a standard service on my Tacoma once. Oil, filters, etc. Next time around I had them give me a quote for a 150k mile service...and it was almost insulting. Got everything to do it myself for a fraction of the parts cost and when I went to replace my cabin air filter it was very clearly about 5 years old.
When I bought my 2005 Tundra I took it to Kendall Toyota for an inspection, they recommended a cabin air filter.
A 2005 Tundra doesn’t have a cabin air filter.
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