Typically serving as a map, dome, or trunk light bulb, the 31mm size bulb is easily upgradable in most modern vehicles. Diode Dynamics currently offers plug-and-play LED upgrade bulbs in the 31mm size that drop right into place of stock incandescent bulbs! Our LED replacements are brighter, more reliable, and come in a variety of colors.
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31mm cross-reference: 3022, 3175 DE3022, 6428, DE3021, 7065, DE3175, DE3022LL, DE3021LL, DE3175LL