The BMW Alpina B7 high beam headlight uses D1S and H7 bulb sizes, while the low beam headlight requires a D1S bulb size. The replacement chart covers vehicle production years spanning 2007 to 2015.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The D1S bulb type is the most prevalent specification across the BMW Alpina B7 headlight data, appearing in both high beam and low beam positions for the 2007-2015 model years, with the sole exception of the high beam on the 2007-2008 models.
The D1S is a High-Intensity Discharge (HID) xenon bulb rated at 85V and 35W, built to ECE standards for use in projector-type housings. It features a PK32d-2 base with an integral ignitor, meaning the ignition component is built directly into the bulb unit rather than housed separately.
The H7 is a single-filament halogen bulb rated at 12V and 55W with a PX26d base. Unlike the D1S, it carries approval not only under ECE standards but also in the United States and Japan, reflecting broader international certification.
The BMW Alpina B7 high beam position for the 2007-2008 model years uses the H7 halogen bulb, while the low beam position for those same years uses the D1S HID bulb, indicating a mixed-technology headlight system for that period.
From 2011 onward, the high beam position transitions to the D1S, aligning it with the low beam and producing a fully HID-based headlight configuration on both positions.
The 2013-2015 high beam and low beam entries carry the qualifier "With HID Headlamps," indicating that the D1S fitment for those years is conditional on the vehicle being equipped with HID headlamp assemblies.
The D1S and H7 bulbs are not interchangeable. The D1S operates at 85V and requires a projector-type housing along with its integral ignitor, while the H7 operates at 12V within a standard halogen reflector or projector housing, making the two systems electrically and physically incompatible.