Lincoln MKS high beam and low beam headlight bulbs both use the D3S size. The replacement chart covers 2009 to 2016 production years with bulb specifications.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
ECE standard (Europe & worldwide). Mercury-free HID (xenon) discharge bulb with PK32d-5 base and integral ignitor, for projector-type housings. 42V, 35W.
The Lincoln MKS uses the D3S bulb size for both high beam and low beam headlights across all model years from 2009-2016.
The D3S is a High-Intensity Discharge (HID) xenon bulb, meaning it produces light by creating an electrical arc through xenon gas rather than heating a filament.
D3S bulbs operate at 42 volts and 35 watts, which are standard ratings for automotive HID systems and require a ballast to regulate the high-voltage ignition pulse needed to start the arc.
The D3S features an integral ignitor built directly into the bulb body, distinguishing it from D1S and D2S types where the ignitor is a separate component housed in the ballast or socket.
The PK32d-5 base is specific to the D3S and D3R bulb family, meaning it is not physically interchangeable with D1S, D2S, or D4S bulbs despite their similar wattage and voltage ratings.
The D3S is designed exclusively for projector-type headlight housings, and installing it in a reflector-type housing would produce improper light distribution.
The D3S carries ECE certification, indicating compliance with European and international lighting standards, and is a mercury-free formulation, which separates it from the older D1S and D2S bulbs that contain mercury.