63213404103 BMW Rear light

These lights basically illuminate, providing a constant glow. They're not blinkers or brake lights – they just stay on when your headlights are on. They’re designed to show other drivers the width and height of your vehicle, especially at night or in low visibility. They also sometimes combine the function of a reflector, bouncing light back toward oncoming traffic. Think of it like this: your headlights and taillights show you’re moving forward or stopping, but the side markers give other drivers a better overall picture of where your vehicle is in relation to theirs. They're positioned on the sides – usually towards the rear – and help complete the visibility puzzle. They work alongside everything else to make sure your vehicle is seen clearly. It’s a safety thing, plain and simple. If one of these is out, it reduces how visible your vehicle is, especially to drivers approaching from the side. It might not sound like a huge deal, but it can definitely increase the risk of an accident. You’ll notice if one is out because it’ll be noticeably dimmer or completely dark compared to the other side. It’s often something that will come up during a state inspection as well. You can find replacements pretty easily – places like Fixparts Online have a good selection, but any auto parts store will carry them. It’s a relatively straightforward fix, usually just a couple of screws or clips holding it in place. Smart choice: Rear Side Marker Light (MPN 63213404103) is backed by a 12-month warranty!

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