reset radio securty code?

Most are never even set - or set to last 4 of the VIN - the theft models take the external amp -- you need that too!

Maybe it's still mounted under the seat?...

Well, dont worry about it unless its coded. Most peolple never install the code. If it does, there is a way, but its tricky. It need to be installed into the car, driven to a dealership and pay a charge.

Yes it's still under the seat.

Or try, wrapping it in "cling film" to stop moisture ingress and then leave it in the freezer for a few days. NV RAM does not like being very cold and tends to clear itself. Let it warm up for a day at room temp before you power it up.

If you show the dealer your registration and driver license, and the serial number of the radio, he can tell you what the code is.

Now how would the dealer have any idea of what you set the code to? For $60 or so the dealer can clear the code -- but NO WAY can he tell you what it might be from serial number of the radio.

A model number is all that needed. There is a 6 digit master unlock codes, but it need to be in the help mode to do it. So you may as well use up all 10 of your trys trying to guess what the 3 digit code is. Hint, try 911 or the last 3 digits of the VIN.

Sorry, my BMW has the code set at the factory, my new Tacoma has no code, and I thought if it had a code, the factory would be the place to set it. It makes sense though that the consumer would set the code to a number he would remember instead of having a code imposed that he won't have a clue about.