Jaguar Vanden Plas Back Up Light Bulb Size

The Jaguar Vanden Plas back up light utilizes a P21W bulb size for illumination during reverse vehicle movement. Available data for the specified component covers the range from 1982 through 2009.

The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.

Bulb Size by Year Range

Years	Bulb Size
1982-2009	P21W

Bulb Specifications

Description	Bulb Size
ECE standard (Europe & worldwide). Single-filament signalling bulb with BA15s bayonet base. 12V, 21W.	P21W

Other Locations

Additional Notes

The Jaguar Vanden Plas uses the P21W bulb size for the back up light across all model years from 1982 to 2009.
The P21W is an ECE-standard bulb, meaning it conforms to the Economic Commission for Europe's regulations, which govern lighting equipment used across European and many worldwide markets.
The P21W operates at 12 volts and 21 watts, which is a standard output level for single-filament automotive signalling applications.
The P21W is a single-filament bulb, meaning it serves one lighting function only, as opposed to dual-filament types that handle two functions such as braking and running lights within a single unit.
The P21W uses a BA15s bayonet base, where "BA15" refers to the 15mm pin-collar size and "s" denotes a single-contact configuration with pins positioned symmetrically around the base.
The symmetrical pin placement of the BA15s base means the bulb can be inserted in any rotational orientation, which is a relevant fitment characteristic when replacing the unit.
Because the BA15s base is a single-contact type, it is not interchangeable with the BA15d base, which carries two offset contacts and is used on dual-filament bulbs despite sharing the same 15mm collar size.