BMW M5 Headlight Bulb Size

Additional Notes

• The D1S bulb is an ECE-standard HID (xenon) discharge type rated at 85V and 35W, featuring a PK32d-2 base with an integral ignitor built into the bulb body. It is designed exclusively for projector-type housings. The BMW M5 uses this bulb for both high and low beam functions across the 2008-2016 model years, making it the most frequently specified bulb type in these headlight specifications.
• The H7 is an ECE-standard single-filament halogen bulb rated at 12V and 55W, fitted with a PX26d base. It carries approval not only under ECE regulations but also in the US and Japan. The M5 specifies this bulb for high beam use across multiple model years from 2000 through 2013, and for low beam use in 2006 and 2007 when halogen capsule headlamps are fitted.
• The D2S is an ECE-standard HID (xenon) discharge bulb rated at 85V and 35W with a P32d-2 base, also intended for projector-type housings. Unlike the D1S, the D2S requires an external ignitor rather than one integrated into the bulb itself. The M5 uses this bulb exclusively for low beam applications in the 2000-2003 and 2006-2007 model years.
• For the 2008-2010 and 2013 model years, the BMW M5 high beam headlight position lists two distinct bulb sizes simultaneously: D1S and H7. This reflects the existence of two different headlamp system configurations for those years, where HID-equipped vehicles use the D1S and halogen capsule headlamp variants use the H7. These two bulb types are not interchangeable with each other.
• Similarly, the low beam position for the 2006 and 2007 model years lists both D2S and H7 as applicable bulb sizes, again corresponding to separate HID and halogen capsule headlamp configurations respectively. Selecting the incorrect bulb type for the installed headlamp system would result in an incompatible fitment.
• The 9005 and 9006 bulbs specified for the 1991-1993 model years follow ANSI standards applicable in the US and Canada. The 9005 is rated at 12V and 65W with a P20d base, while the 9006 is rated at 12V and 55W with a P22d base. Despite their similar appearance, these two bulbs use different base configurations and are not interchangeable between high and low beam positions.
• The 1988 model year specifications reference the H5001 for high beam and the H5006 for low beam. Both are ANSI-standard sealed beam units operating at 12V. The H5001 is a 4-inch square unit and the H5006 is a 5.75-inch round unit. Neither contains a replaceable bulb element; the entire sealed beam assembly is replaced as a single unit when the light source fails.
• The D1S and D2S bulbs share the same 85V, 35W electrical rating and are both designed for projector-type housings, but their base types differ: PK32d-2 for the D1S and P32d-2 for the D2S. The additional distinction is that the D1S incorporates an integral ignitor while the D2S relies on an external one. These differences make the two bulb types physically and electrically non-interchangeable despite their similar operating characteristics.