Xenon HID Ballast W003T20171 D3S/D4S for Audi, Volkswagen, Porsche, Chrysler (2008-2017)

New D3S / D4S xenon HID headlight ballast, a direct replacement for Mitsubishi W003T20171 (Audi 8K0941597B / C / E), for 2008-2017 Audi, Volkswagen, Porsche Macan, Chrysler 300 and Dodge Viper models with factory xenon headlights. Replacement unit for Mitsubishi-type ballasts, not a Genuine Mitsubishi or Audi part. Free shipping to the lower 48.

Fix a Dark or Flickering Xenon Headlight

This 35W ballast powers the factory D3S / D4S xenon headlight. When it fails the headlight can go dark, flicker or cut out. Replacing the ballast costs far less than a complete headlamp.

Fits

Fits vehicles with the factory Xenon headlamp. Match the part number on your old module before ordering.

OEM / Interchange Part Numbers

• Mitsubishi W003T20171
• Audi 8K0941597B / 8K0 941 597 B
• Audi 8K0941597C / 8K0 941 597 C
• Audi 8K0941597E / 8K0 941 597 E
• W003T21971
• W003T18471
• BAM92143700 / BAM92-143700

Common Signs of a Failed Module

• Headlight goes out after a few seconds or minutes
• Headlight flickers or cycles on and off
• One headlight dead while the bulb is good
• Headlight color shifts or the lamp won't strike

Specs

• Brand: replacement for Mitsubishi Electric (not Genuine OEM)
• Lighting technology: Xenon HID, D3S / D3R / D4S / D4R bulb
• Wattage: 35W
• Placement: front left or right headlight
• Sold as one unit, new
• Warranty: 2 years

What's Included

• 1 x xenon HID ballast W003T20171 (replacement, no bulb)

Installation

1. Turn the headlights and ignition off and disconnect the negative battery cable. Let the bulb and ballast cool.
2. On the Audi / Volkswagen / Porsche / Chrysler the ballast is mounted to the bottom or back of the headlamp housing. Depending on the vehicle you may reach it through the wheel-well liner, or you may need to loosen the bumper cover and unbolt the headlamp to pull it forward.
3. Unplug the main power connector and the igniter/bulb lead, then remove the screws holding the ballast to the housing.
4. Compare the part number on your old ballast to the numbers above before fitting the new one.
5. Fit the new ballast, refit its screws and lock every connector fully. It is a direct replacement; no wiring modification is needed when the connectors match.
6. Reinstall the headlamp and trim, reconnect the battery and test low beam (and high beam if bi-xenon).

FAQ

Is this a Genuine Mitsubishi or Audi part?
No. It is a new replacement built to fit in place of Mitsubishi W003T20171 / Audi 8K0941597B, C and E ballasts.

Which bulb does it use?
It is for D3S / D4S (and D3R / D4R) xenon bulbs. The bulb is not included.

Is shipping free?
Yes, shipping is free to the lower 48 US states.