Xenon bulb D1R – For reflector headlamp

The D1R and the D1S share the same base with integrated ballast and the same 35W power, but differ in their optical design. The D1S is intended for projector lens optics, while the D1R incorporates an opaque shield painted on the glass to create the beam cutoff in reflector optics. Without this shield, the beam of a D1S in a reflector would dazzle other road users. The keying tabs on the base normally prevent swapping. AGM Vision clearly distinguishes the two versions.

The most reliable way is to remove the bulb and read the reference engraved on the base. Visually, the D1R has a black opaque area painted on the glass, visible to the naked eye. The D1S has fully transparent glass. You can also look at your headlight: if it contains a round lens visible from the outside, it is a D1S. If the headlight shows a parabolic reflector without a lens, it is a D1R. The service booklet also specifies the reference. AGM Vision sheets indicate vehicle compatibility.

The D1R produces the same raw luminous flux of 3200 lumens as the D1S, because the arc tube is identical. However, the opaque shield absorbs part of the light (about 15 to 20 %) in order to create the beam cutoff. The useful flux perceived on the road is therefore slightly lower. This difference is compensated by the design of the reflector of the optic, which optimizes light distribution. The final result is lighting that complies with standards, with a sharp cutoff preventing glare.

No, you must never remove the opaque cap from a D1R. This cap is essential for road safety: in a reflector optic, it ensures the beam cutoff, which prevents dazzling oncoming drivers. Without the cap, the light would be projected in all directions in an uncontrolled way, creating dangerous glare. In addition, this modification would make the lighting non-compliant and would lead to a failure at the technical inspection. For more brightness, choose a better quality bulb from AGM Vision.

Yes, the D1R is available in several color temperatures: 4300K (original warm white), 5000K (pure white) and 6000K (bluish white). The 4300K is recommended for an identical replacement, compliant with the technical inspection. The 5000K offers slightly whiter lighting, without altering the beam. Note: the opaque shield can slightly change the perception of the tint compared to a D1S of the same temperature. AGM Vision offers the D1R in all common temperatures.

The D1R is less common than the D1S, because the majority of vehicles equipped with D1 xenon use projector lens optics (D1S). Reflector optics with D1R xenon are mainly found on certain Japanese and Korean models. Its relative rarity makes replacement more difficult in a standard auto parts store. AGM Vision keeps the D1R in permanent stock in France to guarantee immediate availability, with shipping within 24/48h.