Koito 7443 Dual-Filament Halogen Automotive Bulb 12V 21W/5W

The Koito 7443 is a premium dual-filament halogen automotive bulb manufactured in Japan by Koito, a trusted OEM supplier to major automotive manufacturers. This T20 wedge base bulb operates at 12 volts with dual wattage ratings of 21W and 5W, providing both high-intensity and low-intensity lighting functions in a single unit.

Key Features:

• Genuine Koito Japan manufacturing for superior quality and reliability
• Dual-filament design: 21W high intensity and 5W low intensity
• W21/5W (7443) T20 wedge base configuration for easy installation
• Standard 12-volt operation for automotive applications
• Cross-compatible with 7443, 7515, 1891, and W21/5W designations
• High-quality quartz glass construction for durability and heat resistance
• Long service life exceeding standard replacement bulbs

This bulb is commonly used for brake lights, turn signals, tail lights, reverse lights, and daytime running lights in vehicles from Toyota, Lexus, Honda, Acura, Nissan, and other manufacturers. The dual-filament design allows one bulb to serve multiple lighting functions, with the 21W filament typically used for brake and turn signal applications while the 5W filament provides running light or parking light functionality. The capless wedge base design ensures secure fitment and proper electrical contact.