The Audi 80 uses a 12821 bulb size for front side marker applications and a 12961 bulb size for rear side marker applications. The replacement chart covers 1988 to 1992 production years with corresponding bulb size specifications.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Audi 80 uses the 12821 bulb for the front side marker position across the 1988-1992 model years.
The rear side marker position on the Audi 80 uses the 12961 bulb across the same 1988-1992 model year span.
Both the 12821 and 12961 are Philips part numbers designating miniature wedge bulbs of the T10 type.
The T10 designation refers to a tubular bulb with a 10mm body width, commonly used in low-intensity automotive lighting applications such as side markers.
Both bulbs share the W2.1x9.5d base type, which is the standard wedge base used across a wide range of miniature automotive bulbs.
Both bulbs operate at 12 volts and consume 5 watts, placing them in the low-wattage category typical of side marker and parking light applications.
Although the 12821 and 12961 share identical electrical ratings and physical base types, they carry distinct Philips part numbers and are specified separately for the front and rear positions on the Audi 80.