The Volkswagen EuroVan front and rear side marker bulbs both utilize a P21/5W size specification across all model generations. The replacement chart covers vehicle production spanning 1993 to 2003, detailing bulb specifications for the entire production run.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Volkswagen EuroVan uses the P21/5W bulb for both its front and rear side marker positions across all listed model years.
The P21/5W is an ECE-standard dual-filament bulb rated at 12 volts, with filaments drawing 21 watts and 5 watts respectively.
The BAY15d bayonet base is the defining physical characteristic of the P21/5W, featuring offset pins that prevent incorrect insertion orientation.
Because the P21/5W carries two filaments, it is not directly interchangeable with single-filament bulbs of similar wattage, as the base and internal construction differ.
The ECE designation indicates the P21/5W conforms to European and internationally recognized lighting standards rather than SAE standards common in North American applications.
The EuroVan (Volkswagen) uses the same P21/5W specification for both the front and rear side marker positions, meaning a single bulb type serves both locations on the vehicle.
The listed model years span 1993-2003, with the P21/5W specification remaining consistent across that entire range for both marker positions.
The dual-filament nature of the P21/5W allows one bulb to serve two lighting functions simultaneously, which is typical in combined marker and turn signal or marker and brake light applications.
The BAY15d base is distinct from the single-filament BA15s base; substituting a BA15s bulb in a BAY15d socket is not mechanically compatible due to the differing pin configurations.
The 5-watt filament in the P21/5W typically serves a continuous low-intensity function such as a position or marker light, while the 21-watt filament serves a higher-intensity signalling function.