BMW X4 Turn Signal Bulb Size

BMW X4 front turn signal bulbs use PY24WNA, 12180, or PY21W sizes, while rear turn signal bulbs use 12182 size for replacement. The chart covers 2015 to 2021 production years with corresponding bulb size specifications.

The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.

Front Turn Signal

YearsBulb Size
2021PY24WNA
201912180
2017-2018PY21W (With HID Headlamps)
201612496 (With HID Headlamps)
2015PY21W (With HID Headlamps)

Rear Turn Signal

YearsBulb Size
2015-201812182

Bulb Specifications

Description Bulb Size
ANSI standard (US & Canada). Amber variant of ECE PY24W with PGU20-4 base. 12V, 24W.PY24WNA
Philips part number. Halogen bulb, specialty application. 12V.12180
ECE standard (Europe & worldwide). Single-filament amber bulb with BAU15s bayonet base. 12V, 21W.PY21W
Philips/Osram part number. Halogen bulb, specialty application. 12V.12496
Philips part number. Halogen bulb, specialty application. 12V.12182

Other Locations

Additional Notes