Jaguar XK headlight bulbs utilize D3S and D1S bulb sizes for both high beam and low beam applications. The replacement chart covers vehicle production spanning 2007 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 and D1S bulbs specified for the Jaguar XK are both HID (high-intensity discharge) xenon types operating at 35W, though they differ in operating voltage: the D3S runs at 42V while the D1S operates at 85V.
Both bulb types follow the ECE standard, meaning they are recognized for road use across Europe and most worldwide markets.
The D3S bulb carries a mercury-free construction, which distinguishes it from earlier HID standards and reflects later environmental regulations governing lamp manufacturing.
Each bulb type incorporates an integral ignitor within the bulb assembly itself, rather than relying on a separate external starter component.
The D3S uses a PK32d-5 base while the D1S uses a PK32d-2 base. Despite sharing the same general base family designation, these two base types are not interchangeable due to differing pin configurations.
Both types are specified exclusively for projector-type headlight housings, meaning they are not compatible with reflector-type housings.
The Jaguar XK (2007-2009) uses D1S bulbs for both high and low beam positions, while the 2010-2015 model years use D3S bulbs across both positions.
Because the high beam and low beam positions share the same bulb specification within any given model year, a single bulb type services both functions on the XK.