One of the most common issues to impact your car's tail lights are burnt-out bulbs. Replacing them is relatively simple and they're pretty inexpensive, too. The final tally does vary depending on what sort of bulbs you're looking for, though. More old-school and simpler halogen tail light bulbs will set you back about $3 to $5 each, on average. Meanwhile, LED tail light bulbs are more expensive, at around $10 to $20 per bulb. The costliest aspect of replacing tail light bulbs isn't the bulb itself. Rather, it's the labor costs to consider if you're having it replaced professionally by a mechanic. The process of removing the tail light lens cover and replacing the bulb will take around an hour, so it's good to spare around $100 to cover any labor charges.