Volkswagen Corrado front and rear turn signal bulbs utilize P21/5W and P21W sizes respectively. The replacement chart covers 1990 to 1994 model years with corresponding bulb specifications.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Volkswagen Corrado uses two distinct bulb types across its turn signal positions for the 1990-1994 model years: P21/5W at the front and P21W at the rear.
The P21/5W is a dual-filament bulb rated at 12V with a 21W primary filament and a 5W secondary filament, mounted on a BAY15d bayonet base.
The BAY15d base features offset pins, which physically prevents substitution with single-filament bulbs sharing a visually similar base style.
The P21W is a single-filament bulb rated at 12V at 21W, mounted on a BA15s bayonet base with symmetrically placed pins.
Both bulb types conform to ECE standards, a regulatory framework used across Europe and numerous other markets worldwide.
The front turn signal position on the Corrado requires the P21/5W across all five model years covered, indicating the position draws on both filaments, likely combining turn signal and parking light functions in a single housing.
The rear turn signal position uses the P21W across the same 1990-1994 span, reflecting a single-function application that requires only one filament.
Because the P21/5W and P21W share a similar physical profile but differ in base type and filament count, the two are not interchangeable despite their comparable wattage on the primary filament.