Make sure you do not touch the glass surface of the bulb with your bare hands; if the oil from your hands touches the glass surface, it may cause the bulb to heat up and burn out.

Clean the bulb with rubbing alcohol to remove any oils that may be on the bulb then remove any traces of alcohol with a dry cloth before reinstalling the bulb.

Screw in the new bulb clockwise to secure it in place.

Put the electrical connector back on.

Hold the bulb by its base and insert it back into the back of the headlight.

Turn your headlights on to test if the headlight works properly.

Screw the cover back on and secure it.