The Jaguar X-Type front inner turn signal uses 3357NA or 3457NA bulb sizes, while the rear turn signal requires 12496 or PY21W bulb sizes. The replacement chart covers 2002 through 2008 model years 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 Jaguar X-Type front inner turn signal position uses two closely related bulb types across its production years: the 3357NA and the 3457NA, both of which are T25 wedge bulbs rated at 12V with natural amber glass.
The 3457NA is a dual-filament bulb rated at 27W and 7W, while the 3357NA is a single-filament bulb rated at 27W. Despite sharing the same T25 wedge form and natural amber glass, these two types are not interchangeable due to the filament difference.
Both the 3357NA and 3457NA conform to ANSI standards, making them the North American market specification for the X-Type front inner turn signal position.
The Jaguar X-Type (2003-2007) front inner turn signal uses the dual-filament 3457NA, while the 2002 and 2008 model years use the single-filament 3357NA.
The rear turn signal position of the X-Type draws from two distinct standards: the 12496, which is a Philips/Osram part number for a specialty halogen application, and the PY21W, which follows the ECE standard used in European and worldwide markets.
The PY21W uses a BAU15s bayonet base, which is an offset-pin bayonet fitting. This base type is not compatible with standard BA15s sockets, making fitment verification essential when servicing the rear turn signal on applicable model years.
The 12496 is identified by a manufacturer part number rather than a universal standard designation, which means cross-referencing to equivalent bulbs requires consulting Philips or Osram compatibility data directly.
The rear turn signal on the Jaguar X-Type for the 2006-2008 model years uses the 12496 bulb, while the 2002, 2004, and 2005 model years use the PY21W. The 2003 model year uses the 12496.
The PY21W is rated at 12V and 21W, whereas the 12496 is rated at 12V with no wattage specified in the provided data. This difference in wattage rating between rear turn signal bulb types across model years is a relevant fitment consideration.
The coexistence of ANSI-standard bulbs in the front position and ECE-standard bulbs in the rear position across certain X-Type model years reflects a mixed-market specification approach that affects part substitution compatibility.