Koito 921 W16W T15 Halogen Automotive Bulb 12V 16W

The Koito 921 is an OEM-quality halogen automotive bulb designed for backup reverse lights, brake lights, and high-level brake light applications. Also known by its international designation W16W, this T15 wedge base bulb delivers reliable performance and meets stringent ECE homologation standards.

Key Specifications:

• Voltage: 12V
• Wattage: 16W (also referenced as 18W in some applications)
• Base Type: T15 Wedge (W2.1×9.5d)
• International Designation: W16W
• Light Output: Approximately 250-300 lumens
• Cross-Reference: Compatible with 1781, 1781-INT part numbers

Features and Benefits:

• Original Equipment Manufacturer (OEM) quality from Koito Japan
• Complies with ECE homologation quality standards
• Robust filament construction engineered to withstand road shock and vibration
• Single filament design for extended service life
• Industrial packaging suitable for professional installation

Koito is a leading Japanese manufacturer of automotive lighting components, supplying OEM parts to major vehicle manufacturers worldwide. This 921/W16W bulb is commonly used in high-level brake lights, backup reverse lights, and brake light applications across multiple vehicle platforms. The T15 wedge base design ensures easy plug-and-play installation without the need for special tools or modification.