Factory bulb sizes and relevant BulbFacts-tested replacement evidence for the 2015 BMW M3.
This vehicle uses integrated factory LED headlights, so there is no conventional low- or high-beam bulb to replace.
Integrated LED headlights are not conventional replaceable-bulb systems. The performance results above describe the selected factory configuration.
Low Beam: Integrated LED · High Beam: Integrated LED
The main headlights use integrated factory LEDs, not conventional replaceable bulbs. Diagnose aim, wiring, modules, moisture, and the assembly before ordering service parts by VIN.
Available exterior and interior lighting data for this model year.
Fitment, factory-system research, and BulbFacts product tests remain separate evidence. A matching bulb size does not by itself make a conversion a vehicle-specific recommendation.
| Position | Bulb or system | Evidence status |
|---|---|---|
| Low BeamLighting: LED | Integrated LED | Integrated / non-replaceable |
| High BeamLighting: LED | Integrated LED | Integrated / non-replaceable |
Fitment note: Verify the installed bulb, connector, housing, and factory system before ordering. A bulb-size match is not automatically a conversion recommendation or proof of vehicle-specific testing.