Odd rattle on driver's side - can't tell where it's from.

[mcnuggs]

My acoustic hood liner makes a lot of noise. So could be related. I'm thinking to remove the liner to see if it makes a difference or not. Just have to be carful not to break the clips.

Mine was missing a ton of clips… no idea if they just fell out or if it was a manufacturing oversight.

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[WallaceMI]

I played around with the acoustic hood liner incl. windshield wiper fluid hose and tried to dampen it with sticky automotive acoustic mat but it doesn't make the difference. Also tried to remove the triangle piece of plastic near the A-pillar: rattle still audible while driving.

I think it must be something in the interior somewhere. Either door, dashboard (I hope not) or maybe something near the OBD port, steering column area.

Tough one...

 

[mcnuggs]

I played around with the acoustic hood liner incl. windshield wiper fluid hose and tried to dampen it with sticky automotive acoustic mat but it doesn't make the difference. Also tried to remove the triangle piece of plastic near the A-pillar: rattle still audible while driving.

I think it must be something in the interior somewhere. Either door, dashboard (I hope not) or maybe something near the OBD port, steering column area.

Tough one...

Ah man that sucks. Anything behind/inside the dash is a no-go for me. You’ll probably end up with more rattles after you put the dash back together.

Unfortunately Toyotas quality control for the 6Th gen leaves ALOT to be desired. I’m kinda bummed that the basics weren’t taken care of especially for how expensive these vehicles are. My old 2019 Jeep Cherokee had less rattles… and that’s really saying something.

 

[WallaceMI]

Good news. I think I found the root-cause of the issue. It's the 'plastic/foam' acoustic shield that sits on top of the firewall.

I was taping around everywhere in the engine bay and the rattle was awful when I hit it. Looked close and many washer nuts missing (I at least found 3 but there might be even more). Either Toyota forgot to put them on or they fall out over time.

I then moved some washers around to see if it can make the noise go away and then took it for a test drive. Rattle was gone!

To make it permanent I need to find either the plastic of metal washer nuts from Toyota or something from the Home Depot. The plastic one are crap imho since they come loose over time.

My question (see my pictures below), does someone know the stud size/pitch/thread so I can find a fitting replacement? The foam shield appears to use a mix out of these white and black studs which might have different sizes.

Hope this helps someone else as well.

 

[WallaceMI]

Looks like these are the (part #57423-26010) Clip

The silver flange nut appears to be part #90178-06026. Gemini says it's a M6x1.0 but not sure if this is correct or not.

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