The Volkswagen Corrado brake light requires a P21/5W bulb size for proper installation and function. Data for the specified component covers the range from 1990 to 1994.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Volkswagen Corrado uses the P21/5W bulb for its brake lights across the 1990-1994 model years.
The P21/5W is an ECE-standard dual-filament bulb rated at 12V with a 21W main filament and a 5W secondary filament, mounted on a BAY15d bayonet base.
The dual-filament design of the P21/5W allows a single bulb to serve two lighting functions, typically combining brake and tail light operation within one unit.
The BAY15d bayonet base features offset pins, a physical characteristic that prevents incorrect single-filament bulbs from being seated in its place.
The center high mount stop light on the Volkswagen Corrado uses the 12961 bulb across the 1990-1994 model years.
The 12961 is a Philips part number designating a T10 miniature wedge bulb rated at 12V and 5W, fitted with a W2.1x9.5d wedge base.
The T10 wedge base of the 12961 is not interchangeable with the BAY15d bayonet base of the P21/5W, as the two bulbs use entirely different mounting systems.
The lower 5W rating of the 12961 reflects its role as a supplemental stop light rather than a primary brake signal source.