BMW X1 high beam and low beam headlight bulbs use H7 or D1S sizes depending on configuration. The replacement bulb size chart covers 2012 to 2021 model years.
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 operating at 12V and 55W, fitted with a PX26d base. It meets ECE standards and holds approval for use in Europe, worldwide markets, the United States, and Japan.
The D1S is a high-intensity discharge xenon bulb operating at 85V and 35W, fitted with a PK32d-2 base. It incorporates an integral ignitor and is designed exclusively for projector-type housings, conforming to ECE standards.
The BMW X1 uses H7 bulbs for both high and low beam positions in the 2021 model year, with no headlamp system qualifier noted for that year.
For model years 2012-2016, the BMW X1 with Halogen Capsule Headlamps uses H7 bulbs in the high beam position. The same H7 fitment applies to the low beam position for model years 2012-2016 with Halogen Capsule Headlamps, and also for 2017-2019.
D1S bulbs are specified for the high beam position on the BMW X1 with HID Headlamps for model years 2012-2016, and for the low beam position with HID Headlamps for model years 2012-2015.
The 2016 model year is notable in the high beam position, as it carries specifications for both H7 (Halogen Capsule Headlamps) and D1S (HID Headlamps), reflecting two distinct headlamp system variants available that year.
Because the H7 and D1S bulbs use entirely different base types, PX26d and PK32d-2 respectively, the two bulb types are not interchangeable with each other under any fitment circumstance.
The D1S integral ignitor distinguishes it from external-ignitor HID configurations. A D1S bulb is not compatible with housings designed for separate-ignitor discharge bulbs such as the D2S.
The H7 halogen bulb operates on a standard 12V vehicle electrical system, whereas the D1S requires 85V to sustain its arc discharge, meaning the two bulb types depend on fundamentally different electrical supply circuits within the vehicle.
For model years 2012-2015, both the high beam and low beam positions on the BMW X1 list dual specifications, requiring confirmation of the installed headlamp system type before a replacement bulb is selected.