The Jaguar XJ high beam headlight uses D3S or H5001 bulb sizes, while low beam headlight applications require D3S or H5006 bulb sizes. The replacement chart covers vehicle production spanning 1969 to 2015 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.
ECE standard (Europe & worldwide). Mercury-free HID (xenon) discharge bulb with PK32d-5 base and integral ignitor, for projector-type housings. 42V, 35W.
The D3S is the dominant bulb type across the Jaguar XJ headlight specifications, serving both high beam and low beam positions for the 2010-2015 model years.
The D3S is a mercury-free HID (high-intensity discharge) xenon bulb operating at 42V and 35W, built to the ECE standard for use in Europe and worldwide markets. It features a PK32d-5 base with an integral ignitor and is designed exclusively for projector-type housings.
Because the D3S incorporates an integral ignitor, it is not compatible with housings that use a separate external ignitor, which is a critical fitment consideration when sourcing a replacement.
The 1969-1971 Jaguar XJ high beam position uses the H5001, a 4-inch square sealed beam unit conforming to the ANSI standard applicable in the US and Canada. Operating at 12V, the entire unit is replaced rather than an internal bulb.
The low beam position for the 1969-1971 model years uses the H5006, a 5.75-inch round sealed beam unit, also ANSI-rated at 12V and replaced as a complete unit.
The H5001 and H5006 are not interchangeable with each other. The high beam and low beam positions on the 1969-1971 XJ take physically distinct sealed beam units of different shapes and sizes.
The transition from sealed beam technology in the early years to the D3S HID system in the 2010-2015 years represents a fundamental difference in replacement procedure: sealed beam units require full housing replacement, while the D3S allows individual bulb replacement within a retained housing.
The D3S standard is ECE-based, whereas the H5001 and H5006 are ANSI-based, meaning the two generations of XJ headlight specifications conform to different regional regulatory frameworks.