Just like shoes, bulbs are better replaced in pairs
Always replace in pairs
Most people only replace a broken or burnt-out bulb. But just like socks and shoes, your headlight bulbs are always better changed in pairs. Replacing just one failed bulb can result in an unbalanced or unpredictable headlight beam that can cause serious hazards for you and other drivers. Your car is designed so that it works best when both headlights are functioning equally. Only then will you get the full advantage of the combined headlight beam.
It takes two
Automotive professionals unanimously recommend that important vehicle parts are replaced together. Brakes, shocks, wiper blades and of course, bulbs 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 bulb 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.
Replacing one failed bulb can lead to an unbalanced beam
• For you as the driver, the road will not be properly lit.
• For oncoming motorists, your car will be harder to see. A seriously unbalanced light could have you mistaken for a motorcycle, with serious consequences.
If one bulb blows, the other isn’t far behind
• Both lights are subject to the same stresses, so they’ll both be deteriorating together. Don’t make the mistake of changing just one bulb while the other is nearing the end of its lifespan. What’s more, you’ll save yourself another trip to the garage or retailer.