OSRAM Xenarc D4S 35W HID Xenon Replacement Bulb (Part 66440)

OSRAM Xenarc D4S 35W HID Xenon Headlight Bulb - Part 66440 (OEM Quality)

Upgrade your vehicle's factory HID system with this genuine OSRAM Xenarc D4S (Part 66440) 35W xenon replacement bulb - delivering near-daylight light quality, OEM fit, and trusted performance. Backed by OSRAM's 4-year guarantee, this bulb offers long-term reliability and confidence for your HID lighting system.

Key Features & Benefits

• Premium OEM-quality bulb from OSRAM - trusted by vehicle manufacturers and used as original equipment in many high-end vehicles.
• 35W power rating with D4S base (P32d-5) - compatible with vehicles equipped for D4S / 66440 HID systems.
• Luminous flux up to ~3,200 lm and color temperature around ~4,100 - 4,500 K - producing crisp, white light closer to natural daylight than conventional halogen lamps.
• Mercury-free design - environmentally friendly compared to older xenon lamps.
• Long service life when used in correct HID systems - engineered for reliability and consistent performance.
• Backed by OSRAM's official 4-year guarantee (for consumer use, terms apply).
• Direct replacement for compatible D4S HID projector systems (check vehicle application).

Detailed Description

When you want genuine quality for your HID lighting upgrade or replacement, the OSRAM Xenarc D4S 66440 is an excellent choice. Built to the same standards as OSRAM's original equipment units, this bulb delivers outstanding visibility and clarity for night driving.

Its higher luminous efficacy compared to halogen alternatives means you'll benefit from improved road illumination with less eye strain. The D4S format (base P32d-5) is common in many factory HID projector systems - making the Xenarc 66440 ideally suited for vehicles that originally use D4S bulbs.

With its ~4,100 - 4,500 K color temperature, the light output shifts toward neutral white, giving you a modern look without the excessive blue tint that can reduce effective illumination and create visibility issues. This is a single-bulb pack - if you're replacing both sides, we recommend fitting them as a matched pair to maintain symmetry and balanced light output.

Installation should be carried out carefully - HID systems involve high voltage and may require a professional if you don't already have HID gear installed.

Technical Specifications

Compatibility & Fitment Instructions

• Requires a vehicle already equipped with a D4S HID bulb socket and compatible ballast/ignition system.
• Not suitable for halogen-only systems unless converted via a full HID kit (which may be illegal in some regions).
• Always replace HID bulbs in pairs for best performance and even light output.
• Handle the bulb by the base only (do not touch the glass element) and wear protective gloves.
• After installation, check beam alignment and cut-off to avoid dazzling other road users.

Why Choose OSRAM Xenarc?

OSRAM's Xenarc range is widely used as original equipment by major vehicle manufacturers. Their Xenarc Original lamps offer industry-leading quality control, optical precision, and durability. Backed by a 4-year guarantee for consumer use, you can buy with complete confidence knowing that manufacturing defects are covered under OSRAM's official warranty program. Investing in a trusted brand means better reliability, superior beam pattern, and fewer issues with flickering or premature failure compared to generic HID bulbs.

Installation Tips & Safety Notes

• Disconnect the battery before beginning work to avoid high-voltage hazards.
• Ensure the headlight housing is fully sealed after installation to prevent moisture ingress.
• Clean the headlight lens and reflectors before fitting for maximum light output.
• Allow HID bulbs a few seconds to reach full brightness after startup.
• Have your beam alignment checked after replacement to ensure safe driving and compliance.
• Dispose of old HID bulbs responsibly - gas-discharge lamps require special recycling.

In Summary

If you're looking for a top-tier HID replacement for your D4S projectors, choose the OSRAM Xenarc 66440. Enjoy true OEM-level performance, superior clarity, and peace of mind knowing you're using one of the most respected names in automotive lighting - all backed by OSRAM's 4-year guarantee.

Order your OSRAM Xenarc D4S 35W (Part 66440) today - restore factory-grade HID performance and brightness to your vehicle.