Polaris RZR 570 Turn Signal Bulb Size

The Polaris RZR 570 rear turn signal bulb uses a 921 size bulb for this model. The replacement chart covers vehicle production years from 2015 to 2018 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.

Rear Turn Signal

Years	Bulb Size
2015-2018	921

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Wedge bulb (T15). 12V, 16W.	921

Other Locations

Additional Notes

The 921 bulb is the sole rear turn signal bulb type listed for the Polaris RZR 570 across the 2015-2018 model years.
The 921 is an ANSI-standardized bulb, meaning its specifications are governed by a recognized North American standard applicable in both the United States and Canada.
The 921 uses a wedge-style base, designated T15, which refers to a tubular bulb body approximately 15 eighths of an inch wide. This base type requires no locking pins or bayonet twist to seat, relying instead on friction from the socket walls.
The 921 operates at 12 volts and draws 16 watts, placing it in the low-wattage range typical of auxiliary signaling applications rather than primary illumination.
The wedge T15 format is shared by several bulb numbers in the ANSI series, so substitution with a physically similar wedge bulb of a different number risks a wattage or voltage mismatch even when the base fits the socket.