Xenon bulb D1S – Original replacement 35W

No, the D1S is compatible only with vehicles equipped with a D1 ballast and projector lens optics. It has a ballast integrated into the base, which distinguishes it from the D2S (separate ballast). It is found mainly on BMW, Audi, Mercedes, Volvo and certain Renault and Peugeot models produced between 2004 and 2018. Check the exact reference on your original bulb before ordering. AGM Vision indicates vehicle compatibility on each product page.

For an like-for-like replacement, 4300K faithfully reproduces the warm white of the original factory-installed bulb. 5000K offers a pure, brighter white, recommended to improve visibility without radically changing the appearance. 6000K produces an aesthetic bluish white, but with a slight loss of range. Beyond that (8000K), the lighting becomes blue-violet, reserved for style. For the vehicle inspection, stay with 4300K or 5000K. AGM Vision offers all temperatures with a visual comparison.

Open the hood and access the rear of the headlight. Disconnect the electrical connector from the ballast integrated into the base of the D1S. Turn the locking ring a quarter turn counterclockwise to release the bulb. Remove it carefully, without touching the glass. Insert the new D1S, lock the ring, then reconnect the connector. The operation takes about 15 minutes per side. It is recommended to change both sides simultaneously for uniform lighting.

The color shift is a normal aging phenomenon of xenon bulbs. The metal salts and xenon gas gradually degrade under the effect of thousands of ignition cycles, changing the color temperature. An original D1S in 4300K can shift toward pink or purple after 3 to 4 years of use. This is a sign that the bulb is approaching the end of its life and that its luminous flux has decreased by about 30 %. Replacing it with a new AGM Vision bulb instantly restores the original brightness.

No, the D1S and the D1R are not interchangeable, although they share the same base and the same integrated ballast. The D1S is designed for projector lens optics (the lens cuts the beam), while the D1R includes an opaque shield for reflector optics. Installing a D1S in reflector optics causes glare for oncoming road users. Check the type of optics (lens or reflector) and the exact reference before ordering from AGM Vision.

A quality xenon D1S bulb offers an average lifespan of 2000 to 3000 hours of operation, i.e. about 4 to 5 years of normal use (1 h to 2 h per day). Premium versions reach 4000 hours. Lifespan depends on the number of ignition cycles (each start-up wears the electrodes), the quality of the ballast, and vehicle vibrations. AGM Vision bulbs are tested to guarantee a lifespan in line with specifications and come with a manufacturer's warranty.