Bulb (P21/5W 12V, Dual-Filament)

This dual-filament clear OEM bulb has multiple uses in the vehicle. P21/5W 12V. Made in Germany., Replaces the following OE part numbers:, N0177382,

OSRAM ULTRA LIFE P21/5W brake, rear and reversing light 7528ULT-02B longlife in double blister, Cars : Automotive

Factory S25 P21W P21/5W 12V 21/5W Amber Car Brake Light Auto Bulb - China 1156 Bulb, 1157 Bulb

Bayonet Bulb - Double Filament - Double Contact - BAZ15d European

VHD-N17-7382-PR - (N177382 1157) - PAIR - TURN SIGNAL - BRAKE TAIL LIGHT - RUNNING LIGHT - DUAL FILAMENT 12 VOLT BULB 12 21/5 WATT - SOLD PAIR

Two-filament P21/5W BAY15d 12V 21/5W

VEHICODE 1157 LED Bulb Red 1157A 2057 2357 2357A 7528 P21/5W Dual Filament Auto Rear Turn Signal Light Tail Brake Blinker 12V 24V Car Motorcycle Lamp Replacement (4 Pack)

BRAKELIGHT BULB P21/5W

Audi, VW Bulb (P21/5W 12V, Dual-Filament) N0177382 by FLOSSER

VEHICODE 1157 LED Bulb Amber Yellow 1157A 1157NA 2057A 2357A 2357NA 7528 P21 /5W Dual Filament Auto DRL Turn Signal Tail Brake Blinker Light 12V 24V Car Motorcycle Lamp Replacement (2 Pack)

Ligth bulb (double function) 12V 5W/ 21W in Bulbs > 12Volt

electrical - How does a lightbulb with two filaments know which one to light up? - Motor Vehicle Maintenance & Repair Stack Exchange