I gifted myself a 2002 solara this april.....and I have had stereo problems..
Actually i checked out that the convertibles seem to have these problems, infact the 2001's are more prone to this..infact they have a solution to this problem and I believe u might wanna check on that before u buy it.
The solution is not expensive thou, but since its covered under the warranty i guess u shudnt be having a problem. The actual problem is I guess from the rear, infact the subwoofer, the padding below is not enuf to keep the vibrations damped..and u get a rattling noise or an extra vibrating effect...its more prominent at lower volume levels...
Also I guess my woofer has blown out within 3 months...May be I have just worned it out..but I guess JBL's r meant for bass lovers and u gotta blow them when u drive ur topless

. I am getting a new sub which is covered under the warranty, so I guess i am not concerned abt it right now..