Bosch 1 987 302 021 Bulb, headlight

Overview of the Bosch 1 987 302 021 Headlight Bulb

The Bosch 1 987 302 021 is a high‑performance halogen headlamp designed for modern automotive lighting systems. It delivers a bright, focused beam that enhances nighttime visibility while maintaining compliance with European and North American safety standards.

Key Technical Specifications

• Model Number: 1 987 302 021 (also catalogued as 1987302021)
• Type: Halogen, R2 (Bilux) Pure Light
• Voltage: 12 V DC
• Power Rating: 45 W / 40 W (dual‑lamp configuration)
• Beam Pattern: Long‑range, high‑intensity beam suitable for both main and fog lamps.
• Base Type: P45t (H4) – a standard automotive headlamp base that fits most vehicles.
• Color Temperature: 4000 K (warm white)
• Lifetime: Approximately 800–1000 hours under normal operating conditions
• Compatibility: Designed for use in a wide range of brands including Volkswagen, Ford, Renault, Alfa Romeo, Abarth, Aprilia, Citroën, Peugeot, Fiat, Honda, Toyota, Lada, and many others.

Design Features & Benefits

The bulb incorporates Bosch’s proprietary Pure Light WS R2 (Bilux) technology. This design optimises light output while reducing glare for on‑road safety. The halogen filament is engineered to withstand high temperatures, ensuring consistent performance even in demanding driving conditions.

• Durable Construction: Heat‑resistant glass and robust metal housing protect the internal components from vibration and shock.
• Efficient Light Distribution: The beam pattern is carefully engineered to provide maximum illumination on the road while minimising light spill into the rearview of oncoming traffic.
• Easy Installation: Standard P45t base allows for quick swap‑in replacement without special tools or modifications.

Installation & Compatibility Guide

Installing the Bosch 1 987 302 021 headlamp is straightforward. Follow these steps to ensure optimal performance:

1. Turn off the vehicle’s ignition and disconnect the battery.
2. Remove the existing bulb by twisting it counter‑clockwise (or following your vehicle’s specific removal procedure).
3. Insert the new Bosch 1 987 302 021 bulb, aligning the P45t base with the socket.
4. Tighten gently to avoid over‑torquing, which can damage the filament or housing.
5. Reconnect the battery and test both high‑beam and low‑beam functions.

Vehicle Compatibility Matrix

The bulb is engineered for a broad spectrum of vehicles. Below is a concise compatibility list:

Performance in Real‑World Conditions

Tested across a range of climates—from hot desert roads to cold Scandinavian winters—the Bosch 1 987 302 021 maintains consistent brightness and beam integrity. Its halogen chemistry ensures rapid warm‑up times, providing reliable illumination within seconds of activation.

Maintenance Tips

• Regular Inspection: Check for visible cracks or discoloration in the glass housing; replace if any damage is observed.
• Clean Lens Carefully: Use a soft microfiber cloth and mild automotive cleaner to remove dirt without scratching the surface.
• Avoid Over‑Heating: Do not leave the vehicle idling for extended periods with high beams on, as this can accelerate filament degradation.

Why Choose Bosch?

Bosch is a globally recognised leader in automotive components. Their headlamp bulbs are known for:

• Reliability: Consistent performance across thousands of vehicles worldwide.
• Innovation: Advanced halogen technology that balances brightness with longevity.
• Quality Assurance: Rigorous testing under extreme conditions ensures safety and durability.

Conclusion

The Bosch 1 987 302 021 Headlight Bulb delivers superior illumination, robust construction, and broad vehicle compatibility. Whether you’re upgrading an older model or installing a new headlamp system, this bulb provides the performance and reliability that drivers expect from a leading automotive brand.