This itty bitty bulb lives behind that itty bitty square red lens fitted to that black rectangular switch in your dash. The one that warns of low brake fluid levels, pad wear and etc.

The original bulbs are no longer available. The base of these replacement bulbs are ever so slightly larger. To fit them, you need to open the bulb hole slightly with a screw driver and then they screw right in. For the screwing in part itty bitty fingers help. It is not a big deal. If you have taken the cover off the switch to check out the bulb, you'll see what we mean.