Im looking to replace the yellowish OEM bulbs on my '03 maxima. Ive already replaced the the clear side markers bulbs and parking light bulbs with the M4 bulbs. So now I need to continue the look with the license plate bulbs and the reverse lights. I am pretty sure that the M4 bulbs work for the license plate bulbs, but Im not 100% sure. However, Im not sure at all about the reverse...which one?

 

M4 will work for the license plate lights. The reverse lights are a 921 bulb I believe.

 

I used my left over H3 fog bulbs and rigged them for my backup bulbs. Damn, are they bright. You basically have to tear apart the H3 very carefully, expose the 2 leads and get them as secure as you can in the bulb housing. They are not a perfect fit, but they will stay in.

 

reverse lights for polargs are M6 (T16) 18W. since you're at it, the trunk light also requires M4 or equiv.