2015 Volkswagen Passat Bulb Size

Misconception: people assume all bulbs for a 2015 Volkswagen Passat are interchangeable, so they pick whatever looks right. That seems true at first because many bulbs share similar shapes and sockets, and it's easy to think size equals fit. What is true is slightly different. Think of it as a mental model where socket type, wattage, and beam pattern matter more than just physical size. The list here matches common bulbs to the Passat's specific sockets and functions, so you can pick headlight, fog, brake, and interior bulbs with confidence. A simple rule of thumb: match the suggested part numbers to your owner's manual before buying. Implications and quick recap: using the right bulb keeps visibility and electronics behaving properly. Quick tests include checking the socket shape and comparing part numbers. Some links on this page are affiliate links, which means I may earn a small commission at no extra cost to you.