The Hyundai XG350 high beam headlight uses an H1 bulb size, while low beam headlights require either H7 or D2R bulb sizes. The replacement chart covers 2002 through 2005 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 Hyundai XG350 uses the H1 bulb for high beam headlights across all model years from 2002-2005. The H1 is a single-filament halogen bulb rated at 12V and 55W, fitted with a P14.5s base, and is certified under ECE standards with approval also extended to the US and Japan.
The H7 bulb serves as the low beam headlight across all four model years covered in the specifications. Like the H1, it is a single-filament halogen bulb operating at 12V and 55W, though it uses a PX26d base rather than the P14.5s base of the H1, making the two bulbs physically incompatible with each other despite sharing the same wattage and voltage ratings.
For the 2004-2005 Hyundai XG350, the low beam headlight fitment depends on the type of headlamp system installed. Vehicles equipped with halogen capsule headlamps take the H7 bulb, while those equipped with HID headlamps require the D2R bulb instead.
The D2R is a high-intensity discharge xenon bulb rated at 85V and 35W, fitted with a P32d-3 base. Unlike the halogen bulbs used elsewhere in the XG350, the D2R requires an external ignitor to initiate and sustain the electrical arc that produces light.
The D2R designation includes an "R" suffix indicating the bulb is specifically designed for reflector-type headlamp housings. This distinguishes it from the D2S variant, which is intended for projector-type housings, and the two are not interchangeable despite sharing the same base type.
Both the H1 and H7 bulbs share the same 12V, 55W electrical rating, but their base configurations differ. This means that while they are electrically similar, they cannot be substituted for one another in a given headlamp socket.