Koito D4R Xenon HID Headlight Bulb - 35W 4300K

The Koito D4R is a premium xenon HID (High Intensity Discharge) headlight bulb designed as a direct OEM replacement for factory HID lighting systems. Manufactured by Koito, a leading Japanese automotive lighting supplier, this bulb delivers superior brightness and road illumination compared to standard halogen bulbs.

Key Specifications:

• Part Number: D4R
• Power Output: 35 watts
• Operating Voltage: 42 volts
• Color Temperature: 4300K (bright white with slight yellow tint)
• Base Type: P32d-6
• Technology: Mercury-free xenon HID

Features and Benefits:

• DOT legal and compliant with ECE Reg 37 and SAE regulations for street use
• Specifically designed for reflector-type headlight assemblies
• Direct plug-and-play replacement for most OEM HID systems
• Superior light output and road visibility compared to halogen bulbs
• Environmentally friendly mercury-free gas composition
• Long service life with high Japanese manufacturing quality
• Commonly used in Toyota, Lexus, and other import vehicles with factory HID lighting

The D4R designation indicates this bulb is engineered for reflector headlight housings (as opposed to D4S bulbs used in projector assemblies). The 4300K color temperature provides excellent visibility in all weather conditions while maintaining a natural, bright white appearance that won't fatigue drivers during extended use.

Cross References: Compatible with OEM part numbers 90981-20029, 90981-20011, 90981-20015. Also cross-references with Philips 42406, Osram 66450, and other D4R standard bulbs.