For the 2015 BMW M3, headlight bulb fitment depends on the installed headlight assembly. Low-beam applications use either D1S or LED, while high-beam applications are listed as either LED or D1S. Confirm whether the vehicle has HID/D1S or LED headlights before ordering, since these systems are not interchangeable.
Front turn signal fitment also follows the headlight configuration: vehicles with HID headlights use a 5200 bulb, while vehicles with LED headlights use an LED turn signal. No fog-light bulb fitment is listed for this model year.
Useful rear lighting replacements include 7506 bulbs for the reverse and rear turn signals, plus a 64136 brake-light bulb. The center stop light, tail lights, daytime running lights, parking lights, side markers, cornering lights, and license-plate light are LED. Interior fitment is primarily LED, with the dome light listed as either 2825 or 98.