Brand new-2026 Tacoma Sport-2.4 Buzzing Rattling

[Ra$$leDa$$le]

First time post (unfortunately). I took in to the dealer to check a few weeks ago, quick tech test drive without me, diagnosis: normal engine noise, HPFP. I've requested an actual ride along in the future along with a more thorough look (waiting to hear back). I'd say its a buzzing rattling, can hear it best with windows down but also now with windows up. Idle I hear it for about 30 sec after starting and then silent idle. Shift into neutral and rev to ~2000ish and you can hear it (listen to my video, if i posted it correct), same while driving at those RPMs, lower speeds more noticeable because less wind. Hot or cold. I know the engine is way different than my previous 3rd gen 6cyl but is this truly normal? I have also been scouring previous posts and other forums and videos but wanted to get some more opinions. The noise in this previous post sounds similar but the thread seemed to end pretty quick without a lot of external input and it was also from about 2 yrs ago: https://www.tacoma4g.com/forum/threads/odd-buzzing-noise-on-acceleration.5214/
Thanks in advance!

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[Sner]

Tough to hear from the video, but sounds normal to me. Maybe some others would contradict my hearing. See what others say.

 

[tech456]

There's two heat shields near where the exhaust goes up into the cat that causes rattling for some people. I saw threads with pics somewhere when I was diagnosing my own rattle issues. People just slightly bent the lip of one of them so they were not touching. Could be something to look into.

 

[GRIZZLYCOMA]

I am not an expert by any means, but this sounds just like mine. If it was vibrations, the heatshields would vibrate more when the engine is in low RPM's, our engines sound like minidiesels.

 

[395North]

Mine has the same sound, never could find an offending heat shield. My guess it's just the injectors or some such.

 

[GRIZZLYCOMA]

Yes, they sound just like a BMW without a head cover.

 

[Danube]

It's the engine changing from port and direct injection. All 4th gens do it.

 

[IDontWorkForTheWaterCo]

I have 2 Corollas with the M20 Dynamic Force engines and they make similar sounds, as does my Tacoma. But it's hard to discern in the video. I do know that the high pressure injectors can be a little noisy. I think that's what you're hearing. D4S system will dance back and worth between direct injection and port injection as needed. That may be the ratting/buzzing sound you're hearing.

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