Jaguar XJ front and rear turn signal bulbs utilize a 1156 size across both positions. The replacement chart covers 1969 through 1971 production years with corresponding bulb specifications.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The 1156 bulb is the sole bulb type across all listed turn signal positions for the Jaguar XJ, covering both front and rear applications for the 1969-1971 model years.
The 1156 is a single-filament bulb, meaning it performs one lighting function rather than serving dual roles such as combined stop and tail operation.
It operates on a 12-volt electrical system at 21 watts, which places it in the standard range for incandescent automotive turn signal applications.
The 1156 uses a BA15s bayonet base, a single-contact fitting where the "s" denotes a single pin, distinguishing it from the dual-contact BA15d base used on some visually similar bulbs.
The BA15s base is not interchangeable with the BA15d base despite sharing the same 15mm collar width, as the pin count and electrical contact configuration differ between the two.
The 1156 carries ANSI standardization applicable in the United States and Canada, indicating the bulb conforms to a defined set of electrical and physical tolerances within those markets.
Because the same bulb type is specified for both front and rear turn signals across the 1969-1971 Jaguar XJ, a single bulb part number satisfies all four turn signal sockets on the vehicle.