The Chevrolet Bolt EV high beam and low beam headlight bulbs both utilize a D3S size bulb for optimal illumination performance. The replacement chart covers vehicle production spanning 2017 to 2020 with corresponding bulb size 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 Chevrolet Bolt EV uses the D3S bulb for both high beam and low beam headlights across the 2017-2020 model years.
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.
The D3S operates at 42 volts and 35 watts, which are standard ratings for automotive HID discharge bulbs in this category.
A defining characteristic of the D3S is its integrated ignitor, which is built directly into the bulb body rather than housed separately in the vehicle's lighting system.
The D3S uses a PK32d-5 base, a connector type specific to HID bulbs with integrated ignitors, making it incompatible with D3R or other HID variants that share similar wattage but differ in base design or housing compatibility.
The D3S is formulated without mercury, in compliance with environmental regulations that restrict hazardous substances in electrical components under standards such as the European Union's RoHS directive.
The D3S is designed exclusively for projector-type headlight housings, and its use in reflector-type housings would produce improper light distribution.
The D3S conforms to ECE (Economic Commission for Europe) standards, a regulatory framework recognized across Europe and numerous other markets worldwide.