It takes two
Automotive professionals unanimously recommend that important auto parts are replaced together. Brakes, shocks, wiper blades and, of course, lights should always be replaced in pairs. After all they are all subjected to the same stresses over the same amount of time. It’s also important to consider the environmental impact. Not only is it unsafe to drive with unequal headlights, if one lamp burns out, the other is sure to follow soon – and that means fuel and time for two trips to the garage for repairs instead of one.