I recently bought a TL-S put in a ram air intake and noticed that one of my ground wires was broke in half. So I went the next day bought new ground wires replaced them and guess what happened? I couldn't turn on my radio. Well through strong determination I was not going to pay for some dealer to get it nor was I going to have some internet site charge me. SO LOOK UNDER YOUR ASHTRAY MAKE SURE YOU LOOK UNDER NOT IN THERE IS A LITTLE L SHAPED PIECE THAT WILL POP OUT ON THE BACK IS A STICKER WITH A 5 DIGIT NUMBER AND GUESS WHAT THAT NUMBER IS FOR YOU GOT IT. Please dont waist your money this may not work for all TL's.

 

Pass this on to all it may be helpful to.

 

Thats all up to the dealer, some stick the code on the inside of the trunk, others in the glovebox. Mine didnt have the code anywhere. But if your dealership isnt complete assholes they can give you the code over the phone, like mine has.

 

Yeah, I don't have any stickers. I just asked at the service counter and they looked it up for me.

 

Mine came on a nice credit card sized card in my manual.

 

I had the same problem when I bought my car on Friday. Saturday morning, I just took the stereo out, called my local Acura dealer, read them the serial number and they gave me the 5 digit code.