The dim bulb

The Complete and Total Loser drives a loser's car: his late mother's 1998 Toyota Camry. On Wednesday, as the Loser exited the car, a man in the parking lot told him one of his taillights was out. This made the Loser feel insecure about driving, even though he'd probably been driving it with the light out for a few weeks, at least—there is no one in his life who would tell him that. 

This is the old 3157 taillight bulb the Loser replaced.

The normal reaction for the Loser would be to take it to a mechanic and have it replaced, but the Loser is low on funds these days so he went instead to Youtube, then a nearby Napa autoparts where they sold him the 3157 bulb he needed.
Total cost of replacing the bulb: $3.00 plus about fifty cents worth of gas to get there and back (it's really close).