The Jaguar XJ6 side marker requires a 12961 bulb size for the specific lighting components located on the exterior of the vehicle. Data for the specified bulb size covers the range from 1995 to 1997.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The bulb type 3893 is the most widely used across the Jaguar XJ6 side marker specifications, appearing in both front and rear positions across a substantial portion of the model's production span.
The 3893 is a dual-filament bulb with a BAY15d bayonet base, rated at 12V. The BAY15d base features two pins offset at different heights, which physically prevents incorrect single-filament substitutes from seating in the socket.
The 1895 bulb, a T5 miniature wedge type rated at 12V and 0.9W, serves both front and rear side marker positions on the Jaguar XJ6 for model years 1973-1978.
For the 1995-1997 front side marker, the Jaguar XJ6 uses the 12961, a Philips-designated T10 miniature wedge bulb with a W2.1x9.5d base, rated at 12V and 5W. This bulb type does not appear in the rear side marker specifications.
The W2.1x9.5d base of the 12961 is a metric wedge standard common in European automotive applications, which reflects the XJ6's British origins and distinguishes it from the ANSI-standard wedge bulbs used in earlier model years.
The 1979 front side marker position uses the 1816, a T3.25 miniature wedge bulb rated at 12V and 4W, making it the sole model year in the front side marker data to use that bulb type.
The 1979 rear side marker uses bulb type 67, a single-filament bulb with a BA15s bayonet base rated at 12V and 8W. The BA15s base is a single-contact bayonet fitting, distinct from the dual-contact BAY15d base found on the 3893.
The 3893 and the 67 both use bayonet-style bases but are not interchangeable. The BAY15d base of the 3893 has offset pins and a dual-filament design, while the BA15s base of the 67 has a single contact pin and a single filament, making the two physically and electrically incompatible.
A bulb change occurs in the front side marker between 1994 and 1995 on the Jaguar XJ6, where the 3893 bayonet-base bulb is replaced by the 12961 wedge-base bulb. These two types use entirely different base designs and are not interchangeable.
The rear side marker specifications for the Jaguar XJ6 do not include entries for 1995-1997, while the front side marker does. The rear side marker data ends at 1994, where the 3893 was in use.