A simple replacement for a car’s headlight assembly can run hundreds, even thousands of dollars — a Ford Focus’ can run almost two grand. And if you thought halogen bulbs were expensive to replace, consider the high cost of high-intensity xenons. A BMW headlight assembly without a bulb can cost as much as $985, not including accessories. LED bulbs, which you can find on a Honda Civic or a top-end Mercedes-Benz, are supposedly longer-lasting but also not cheap. LED replacements can run anywhere from $350 for brake lights to $100 for headlights.
The Cheap Fix: If the assembly isn't damaged, you can use a headlight restoration kit, which you can find in most auto parts stores or online. Replacing the bulbs yourself is also an option. (Halogens are easiest and can cost about $15 a piece.) To protect headlights from cracking or breaking, consider installing a brush guard or bra. Or don’t hit a deer.