Xenon D3S bulb – Mercury-free replacement

The D3S mainly equips European vehicles produced since 2010: Audi A1, A3, A4, A5, Q5, Volkswagen Golf VII, Passat B7/B8, Skoda Octavia III, Seat Leon III, BMW 1 Series (F20), Volvo S60/V60 and certain Opel/Vauxhall models. It is the mercury-free version of the D1S, with ballast integrated into the base. The D3S uses a specific D3 ballast, not compatible with D1. Consult the AGM Vision datasheets to confirm compatibility with your vehicle.

No, the D3S and the D1S are not interchangeable, even though they have a similar format with an integrated ballast. The D3S operates with a different ignition voltage and gas chemistry (mercury-free). The connector and base have keying features that physically prevent cross-installation. Forcing the installation of a D1S on a D3 ballast can damage the ballast and the bulb. Always check the exact reference on the original bulb. AGM Vision clearly distinguishes each series in its catalog.

The mercury-free D3S was developed to comply with European environmental regulations (RoHS directive) limiting the use of hazardous substances in automotive equipment. The mercury present in D1S and D2S is replaced by other metal salts, which ensure the same arc stability and the same light quality. Performance is identical: 35W, 3200 lumens, temperatures from 4300K to 6000K. The D3S therefore represents an environmental improvement, without compromise on lighting quality.

Yes, the D3S offers a lifespan comparable to the D1S, i.e. about 2000 to 3000 hours of operation. The removal of mercury did not affect longevity thanks to the optimization of replacement metal salts. Some manufacturers even claim longer lifespans thanks to manufacturing advances. Lifespan also depends on the number of ignition cycles and the quality of the ballast. AGM Vision D3S bulbs are tested to guarantee a lifespan in line with OEM specifications.

Replacing a D3S is similar to replacing a D1S, as both have an integrated ballast in the base. Access the rear of the headlamp, unplug the electrical connector, turn the locking ring a quarter turn, then remove the bulb. Insert the new D3S, lock it and reconnect. The operation takes about 15 minutes per side. Handle the bulb by the base, without touching the quartz glass. Replace both sides for uniform lighting. AGM Vision bulbs are supplied with instructions.

D3S 55W bulbs exist in an aftermarket version, but are not approved for road use. The original D3 ballast is calibrated for 35W and cannot power a 55W bulb. Using a 55W D3S requires a compatible 55W aftermarket ballast, which constitutes a modification of the lighting system. The brightness gain is significant (about 40 % more lumens), but lifespan decreases. This option is reserved for off-road use. AGM Vision offers both versions.