The 2004 Volkswagen Passat GLX is somewhat easy to maintain. All of the tail lights are accessible behind a single panel in the trunk, allowing for reliable bulb changes. The cabin air filter can be accessed without a problem, as the panel covering it in the cowl can be easily removed. In the same location the battery can be easily reached, with open access to both the bracket and terminals.
However, the 2004 Volkswagen Passat GLX has its downsides. The engine air filter requires the removal of its intake vent and multiple hard-to-reach fasteners to access the filter itself. That same vent needs to be removed to access the headlights on the passenger side, while those on the driver side require the removal of many additional parts. The fog lights and petcock don’t have reliable access, either, requiring panels in the bumper to be removed before you can reach them.
Hans Angermeier has produced over 100,000 videos showing drivers how to fix things on their cars. He has broad expertise on basic repair procedures covering the majority of cars on the road.