I'd heard on an audio forum a while back that the ES firewall is a double panels filled in between with sand, or something along those lines. I'd never heard this before or since, and have no clue if this guy knew what he was talking about; but I don't want to drill into it and find out he's right.

So, does anybody know? It'd make my life easier if I could put a few holes in the firewall.

 

I have done this to my 96 ES300, and it worked out just fine. I did not notice any sand in between or anything. I drilled in and grabbed the wire from above the gas and brake pedals. I don't think you should have a problem.

 

I've drilled through my firewall and there weren't any sand so I think your all set.

 

Thanks, it sounded a little funny, but you never know. Better safe than sorry.

 

Depending on what you are running through, you may not have to drill. Find an existing grommet where wires are already run, and see if you can squeeze your wire through.

 

I'd be drilling to put in a few screws to mount brackets for hanging HLCD speakers; so I'm not running wires through. Otherwise I would've tried an existing grommet. Thanks for the suggestion though.