The Jaguar Vanden Plas side marker requires a bulb size of 12961 for proper installation and function within the lighting assembly. Data for the specified component covers a range from 1995 to 2009.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The two bulb types specified across the Jaguar Vanden Plas side marker positions are the 12961 and the 3893, each with distinct base types and filament configurations that make them non-interchangeable with one another.
The 12961 is a Philips part number designating a T10 miniature wedge bulb with a W2.1x9.5d base, rated at 12V and 5W. The wedge base design means the bulb is held in place by tension from the socket rather than by a locking bayonet mechanism.
The 3893 follows the ANSI standard used in the United States and Canada. It is a dual-filament bulb fitted with a BAY15d bayonet base, which uses two offset pins to lock into the socket and prevent incorrect installation of a single-filament substitute.
Because the 3893 carries two filaments, it is capable of serving more than one lighting function within a single housing, a characteristic relevant to its classification as a specialty application bulb.
Both bulb types operate on a 12V electrical system, consistent with standard automotive voltage across the Vanden Plas model range covered in the specifications.
For the front side marker position on the Jaguar Vanden Plas, the 12961 bulb applies to model years 1995-2009, while the 3893 applies to model years 1982-1994, representing a change in bulb specification at the 1995 model year.
For the rear side marker position, the 12961 applies to model years 2001-2009 and the 3893 applies to model years 1982-1994.
The front and rear side marker positions share the same bulb type in all years where both positions are specified, meaning no year calls for different bulb types front-to-rear.
The W2.1x9.5d base of the 12961 is a metric designation describing the wedge contact width and pin spacing, and it is not physically compatible with the BAY15d bayonet socket used by the 3893.
The rear side marker data for the Jaguar Vanden Plas covers model years 1982-1994 and 2001-2009, with no rear side marker entries present for 1995-2000 in the specifications.