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⚡ The best P21W bulbs in stock
Stock checked on October 6, 2026
The best P21W bulbs in stock
SYLVANIA 1156 Long Life Miniature Bulb, Stop & Tail Light, 2 Bulbs.
AUXITO 1156 LED Bulbs for Reverse Lights Brake Tail Lights, Super Bright 7506 1141 1003 BA15S P21W LED Bulbs…
PHINLION 1156 LED Reverse Light Bulb, 3600 Lumens, 6000K White, 2 Pack
PHINLION 1156 7506 Amber LED Turn Signal Light Bulb, 3600 Lumens, 2 Pack
iBrightstar 1156 LED Bulb Amber, BA15S 1141 LED Turn Signal Bulbs Super Bright for Vehicle Blinker Lights and…
iBrightstar 1156 LED Bulb White, BA15S 1141 Camper Rv LED Lights Bulbs Super Bright for Back Up Reverse…
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Cars that use a P21W bulb
We don’t have any cars with this bulb in our English database yet. Search for your car to see all its bulbs.
Which P21W to buy: standard, brighter or long life
- Standard: the classic incandescent bulb; cheap and no dashboard warnings.
- LED: whiter light and lower power draw. On turn signals and brake lights they can cause hyperflash or bulb-out warnings: choose CANbus versions or add load resistors.
- Long life: handy where bulbs are hard to reach (tail lights or dome lights).
To confirm which bulb each light on your car uses, follow the methods in how to find out which bulb your car takes.
Signal & interior bulbs
Frequently asked questions
What is a P21W bulb?
The P21W is a 21 W, 12 V automotive bulb with a BA15s base. It’s also sold as 1156 and 382.
Is the P21W the same as the P13W?
No. Even if they look alike, each size has a different base (BA15s on the P21W) and won’t fit another size’s socket. Always buy the exact size your car takes.
Can I replace a P21W with an LED?
Yes, LEDs are common for turn signals, parking, license plate and dome lights. Pick CANbus versions or use load resistors to avoid hyperflash and bulb-out warnings, and keep the correct color (amber for turn signals, red for brake lights).