Jaguar XJ6 Map Light Bulb Size

The Jaguar XJ6 map light utilizes bulb sizes 12961 and 3893 depending on the specific production period for the interior illumination components. Available data for the lighting specifications covers the range from 1984 to 1997.

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
1995-1997	12961
1984-1994	3893

Bulb Specifications

Description	Bulb Size
Philips part number. Miniature wedge bulb (T10) with W2.1x9.5d base. 12V, 5W.	12961
ANSI standard (US & Canada). Dual-filament bulb with BAY15d bayonet base, specialty application. 12V.	3893

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Additional Notes

The Jaguar XJ6 map light specifications cover model years 1984 through 1997, with two distinct bulb sizes appearing across that span.
The 3893 is an ANSI-standard bulb used in the Jaguar XJ6 map light for the 1984-1994 model years, making it the more widely specified of the two bulb types across this vehicle's history.
The 3893 bulb features a BAY15d bayonet base, which is a dual-contact indexing base designed to prevent incorrect rotational installation. It operates at 12V and carries a dual-filament construction.
The 12961 is a Philips-designated miniature wedge bulb specified for the 1995-1997 model years of the XJ6 map light position.
The 12961 bulb follows the T10 form factor and uses a W2.1x9.5d wedge base, which relies on the tension of the socket contacts rather than a locking mechanism to retain the bulb. It is rated at 12V and 5W.
The two bulb types are not interchangeable. The 3893 uses a bayonet-style base while the 12961 uses a wedge-style base, meaning the socket design differs between the earlier and later XJ6 model years.
The base type change between the 3893 and the 12961 reflects a shift in socket engineering between the 1994 and 1995 model years of the XJ6.
The 3893 is recognized under ANSI standards applicable in the United States and Canada, while the 12961 is identified by a Philips part number, indicating different classification systems govern each bulb.