Posted June 28, 2019. Osram is apparently going to release their LEDriving headlights for the Focus 3.5, no idea when though their customer support advised me when I e-mailed them. If you have an older Mk 3 then you can already get road legal headlights just damned expensive but they do look the business. Quote. Hi - I've just come across this post and am concerned that the images shown are symmetrical. Usually I would expect the masking to be the same side on each headlamp rather than the symmetry shown here on these pictures (because you need the block the beams that dip to the left on each headlight). Replacing Headlight Bulbs. The wire clip or bracket around the bulb needs to be removed. You do that by pulling the looped end of the wire clip inwards, towards the center or the bulb. Push it in, towards the car, and pull in towards the centre and it will release. Once the clip is off the bulb comes out easily. Our 2004 Ford Focus headlight bulb chart shows you every 2004 Ford Focus headlight bulb size. The 2004 Ford Focus headlight bulb size is a 9003 bulb or HID-D2S bulb. Use our 2004 Ford Focus headlight bulb size guide for your car headlight replacement. Find the 2004 Ford Focus headlight bulb replacement you need below. Application. If your Side-marker bulb has gone out in your Ford Focus (2012-2018), use this guide to replace the bulb and get back on the road safely. Side marker lights are auxiliary safety lights that clearly show other drivers your vehicle's location and direction of travel from a variety of angles. This is a video tuturial of how to remove ur driver side headlight assembly for 2010 Ford Focus. With the hood open, hook your test light to the battery positive. You may need to use jumper cables to connect the test light to the battery if your test light is not long enough to reach the bulb socket. Find an unpainted and clean metal surface under the vehicle’s hood to act as a good ground. Use it to check if the test light works. To change light bulb in Ford Focus MK2 you need to remove the headlight. Luckily to disassembly the headlight you don't need much tools, time or skill to do UCS2.