The Jaguar XJ8 high beam headlight uses an H7 bulb size, while low beam headlights accommodate either D1S or H7 bulb sizes depending on configuration. The replacement chart covers vehicle production spanning 1998 to 2009 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.
The H7 bulb is the most widely used type across the Jaguar XJ8 specifications. It is a single-filament halogen bulb operating at 12 volts and 55 watts, fitted with a PX26d base. It holds ECE certification for use in Europe and worldwide markets, with additional approval in the United States and Japan.
The H7 bulb serves as the high beam headlight fitment for the Jaguar XJ8 across all listed model years, spanning 1998-2009 without variation.
The D1S is a high-intensity discharge bulb, commonly referred to as a xenon or HID bulb. It operates at 85 volts and 35 watts, uses a PK32d-2 base, and incorporates an integral ignitor. It is designed specifically for projector-type housings and also carries ECE certification.
For the low beam headlight on the Jaguar XJ8, the 2004-2008 model years present a dual-fitment situation. Vehicles equipped with halogen capsule headlamps use the H7 bulb, while those equipped with HID headlamps use the D1S. These two bulb types are not interchangeable, as they differ in operating voltage, base type, and housing compatibility.
The 2009 model year low beam headlight is specified exclusively with the D1S bulb, with no halogen alternative listed for that year.
The low beam headlight for the 1998-2003 model years is specified solely with the H7 bulb, with no HID variant listed for those years.
Because the D1S requires a projector-type housing and an integral ignitor, it is not a drop-in replacement for H7 halogen housings. Substituting one type for the other without the appropriate housing would be outside the scope of the listed specifications.
The PX26d base of the H7 and the PK32d-2 base of the D1S are physically distinct, which further reinforces that bulbs specified for HID-equipped and halogen-equipped variants of the same model year are not cross-compatible.