BMW X3 high beam and low beam headlight bulbs utilize D1S, H7, and D2S sizes depending on model configuration. The replacement chart covers 2004 through 2018 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 H7 is a single-filament halogen bulb rated at 12V and 55W, fitted with a PX26d base. It carries ECE approval for use across Europe and worldwide, and is also approved for use in the United States and Japan.
The D1S and D2S are both HID (xenon) discharge bulbs rated at 85V and 35W, each designed for projector-type housings. The key distinction between them is that the D1S has an integral ignitor built into the bulb body, while the D2S requires a separate external ignitor. Their base types also differ, with the D1S using a PK32d-2 base and the D2S using a P32d-2 base, making the two types non-interchangeable.
On the BMW X3, the high beam headlight for 2004-2010 model years is served exclusively by the H7 bulb. No HID option is listed for the high beam position across those years.
For 2011-2018 model years, the BMW X3 high beam headlight accommodates either a D1S or an H7 bulb, depending on whether the vehicle was built with HID or halogen capsule headlamps respectively.
The low beam headlight on the BMW X3 for 2004-2006 model years lists the D2S as the HID option, while 2007-2018 model years list the D1S in that role. Substituting one for the other is not supported, given their differing ignitor configurations and base types.
Because the D1S and D2S share the same wattage and voltage ratings but differ in base type and ignitor design, a vehicle wired for one type cannot accept the other without modification to the housing or ignition circuit.
The H7 bulb appears across all model years covered in the specifications, from 2004 through 2018, making it the most consistently listed bulb type in these headlight fitment records for the BMW X3.
Both HID bulb types listed, the D1S and D2S, carry ECE certification, which is the regulatory standard applied in Europe and most markets worldwide outside North America and Japan.