PHILIPS D1S XenStart HID Xenon Bulb 85415C1 - D1S 35W OEM-fit, 4300K 3200lm

The PHILIPS D1S XenStart 85415C1 is an OEM-grade HID xenon headlight bulb designed to restore factory brightness, color temperature and reliable performance for vehicles specified to use D1S bulbs.

Engineered in Germany for many premium carmakers, the Philips D1S XenStart 85415C1 matches original-equipment light output and tone while fitting PK32d-2 D1S sockets. It’s intended for vehicles that originally shipped with D1S 35W xenon systems and is specified to deliver roughly 3,200 lumens and a crisp color near 4,300 K. Choosing the correct D1S bulb helps maintain beam pattern accuracy, reduce glare, and keep nighttime visibility consistent with the vehicle’s factory calibration.

How does this bulb compare to other HID bulbs for brightness and color?

The Philips D1S XenStart is tuned for factory-equivalent performance rather than aftermarket extreme color shifts. It produces a balanced white light with a warm-white to neutral-white tone around 4,300 K and a lumen output close to 3,200 lm, giving a clear road view without pushing the system beyond its design.

• Approx. 3200 lm ±15% lumen output for strong forward illumination
• Color temperature up to 4300 K for neutral white light
• 85 V / 35 W power draw, matching OEM xenon ballasts

Will this D1S XenStart bulb fit my car and electrical system?

This bulb uses the PK32d-2 base and is specifically the D1S size, so it fits vehicles built for D1S xenon lamp modules. Always confirm your vehicle’s required bulb code before ordering; the Philips part replaces many manufacturer numbers across Audi, BMW, Mercedes, Porsche and others.

• Size: D1S (not interchangeable with D3S or other sizes)
• Base: PK32d-2 — matches factory D1S sockets
• Cross-reference list: compatible OEM numbers for Audi, BMW, Mercedes, Porsche, Volvo and more

What can I expect for lifespan and reliability?

The XenStart D1S is built for dependable service life under normal use, reflecting Philips’ OEM manufacturing standards. While actual life varies with driving conditions and ballast health, this model is produced to provide consistent light output and long-term fitment typical of factory-installed xenon lamps.

• Designed and manufactured in Germany to OEM quality standards
• Rated for typical xenon lamp life cycles (varies by usage)
• Maintains consistent color and output when paired with healthy ballasts

How should I install and maintain a D1S xenon bulb?

Installation of D1S bulbs usually requires access behind the headlamp housing and possibly removal of trim; avoid touching the glass and follow vehicle service instructions. If you see flicker or poor light output after installation, check the ballast and connectors for corrosion or damage.

• Do not touch the glass envelope — use gloves or a clean cloth
• Confirm ballast compatibility and secure electrical connections
• Replace bulbs in matched pairs when possible to maintain balanced light output

Who is this for: The Philips D1S XenStart 85415C1 is aimed at owners of cars originally equipped with D1S xenon headlights — especially drivers of premium European models who want a direct-fit, manufacturer-quality replacement that preserves factory beam pattern, color and brightness. It’s a suitable choice for professional technicians and DIYers who need an exact D1S PK32d-2 replacement without altering the vehicle’s lighting system.

Technical snapshot:

• Size: D1S
• Base: PK32d-2
• Kelvin: Up to 4300 K
• Lumen: 3200 lm ±15%
• Power: 85 V / 35 W