TYC 20-9774-91 Headlight Assembly - Left

Overview of TYC Regular Left Headlight Assembly for BMW

The TYC Regular left headlight assembly (part number 20-9774-91) is designed specifically for select BMW models, including the 428i, 430i, 435i, 440i, M3, and M4 series. This headlight assembly features a clear polycarbonate lens and durable polypropylene housing, engineered to meet SAE/DOT compliance standards for exterior lighting.

• Compatible with BMW 428i, 430i, 435i, 440i, M3, and M4 models
• Part number 20-9774-91 for precise fitment
• Clear PC plastic lens with PP plastic housing
• Includes lens and housing components
• Supports HID D1S bulb types for low and high beams (bulbs not included)
• Equipped with AFS motor for adaptive front lighting system
• Front signal light bulb included (Halogen PY24W)
• Park lamp bulb included (LED)
• Daytime running light bulb type is LED (bulb not included)
• SAE/DOT compliant for safety and legal use

TYC Regular Product Line Details

The TYC Regular product line offers reliable replacement lighting components that balance quality and value. This line focuses on providing direct-fit headlight assemblies that meet OEM specifications without including bulbs or installation hardware unless specified. The 20-9774-91 headlight assembly is part of this line, ensuring compatibility and durability for your BMW's exterior lighting needs.

Product Features and Specifications

This left headlight assembly is constructed with a clear polycarbonate lens that resists impact and weathering, paired with a polypropylene housing designed for long-term durability. It supports HID D1S bulbs for both low and high beams, although bulbs are not included. The assembly includes an adaptive front lighting system (AFS) motor, enhancing visibility by adjusting the beam direction based on steering input. The front signal light comes with a halogen PY24W bulb, and the park lamp uses an LED bulb, both included for immediate functionality. Daytime running light bulbs are LED type but not included. This assembly is designed to meet SAE and DOT standards, ensuring compliance with safety regulations.

Compatible BMW Models and Applications

• BMW 428i and 428i Gran Coupe (including xDrive variants)
• BMW 430i and 430i Gran Coupe (including xDrive variants)
• BMW 435i and 435i Gran Coupe (including xDrive variants)
• BMW 440i and 440i Gran Coupe (including xDrive variants)
• BMW M3 and M4 models

Common Issues Addressed by This Headlight Assembly

• Cracked or damaged lens affecting light output and appearance
• Malfunctioning adaptive front lighting system (AFS motor)
• Non-functional front signal or park lamps
• Water intrusion or fogging inside the headlight housing
• Wear and tear from road debris or environmental exposure

Installation Notes and Tips

Installation of the TYC Regular 20-9774-91 headlight assembly requires removal of the existing headlight unit. Since bulbs are not included for low and high beams, ensure compatible HID D1S bulbs are installed separately. The assembly includes the lens and housing but does not come with installation hardware, so retain original mounting components or acquire replacements as needed. Proper alignment and connection of the AFS motor and electrical connectors are essential for full functionality.

Quality Assurance and Compliance

This headlight assembly is manufactured to meet SAE and DOT compliance standards, ensuring it adheres to safety and performance requirements for exterior automotive lighting. The TYC Regular line maintains consistent quality control to provide a reliable replacement part for your BMW. Warranty information should be confirmed with the distributor or manufacturer.