My Avalon 2000 XLS's rear speaker sounds like the cone is broken and needs to be replaced. I have the JBL sound system and have read that I need the JBL powered sub-woofer speaker which was made for the Avalons. Toyota wants over $250 for the speaker, plus install. I found a place in FL, Simply Speakers, that fixes the speakers for about $40. But, I need to remove it first. I've removed the cover on the rear deck that also houses the brake light. But before I buy the probably metric sized nut remover (the 3/8" is close but no cigar) has anyone done this and any suggestions or warnings?

remove the woofer and chek the damage, sometimes tears are easily fixed with a light glue (wood glue works well).
u should be able 2 replace the sub with any 8" sub on the market. all u needa du for install is bolt in2 bracket n plug the speaker wires in. if the aftermarket sub doesnt have the same mounting holes , just drill holes in the metal rim.

i wouldnt suggest going and paying, because you could probably easily do it. its pretty easy

The bolts are 10 MM

yes you are right it is a 10mm socket but make sure the speaker you put in is a 4 ohm I made the mistake and put a 8ohm and the amp didnt pump the bass like it used to car comes with a 3.7 ohm I found a good sounding speaker made by boss new at the trading post the bass is back to normal