Unless the light bulb in your radio is the same as some of the others in your car I doubt that the dealership can do you much good. A short lesson in light bulbs: The shape is indicated by a letter. I suspect the one in your radio is a "T" which looks like a medicine capsule cut in half. It could possibly be round like a marble which is a "G". The size is measured in 1/8ths of an inch. A common size is 3.25 1/8ths of an inch but they have larger and smaller. Then there is the shape of "what they call" the base. The part that sticks into the socket. A lot of them look like they just squashed the glass and turned the wires up on either side. That is called a wedge base. I may be wrong but I suspect you are looking for a "T 3.25 with a wedge base" Of course it will have to be 12 volt and just a few watts. Check out the following web site and look at the Single LED wedge base bulb and see if it is what you are looking for.... http://www.superbrightleds.com/mini-wedge.html ...Good Luck...