Owners of other similar Ford sedan or hatchback vehicles such as the Fiesta, Fusion, Taurus and C-Max may also find these DIY instructions to be helpful.

Replacement bulbs with their part numbers are as follows: Low Beam # H11, High Beam # H1, Turn Signal # 7440 and Front Side Marker # 168NA ("natural amber" colored glass).

The only tool needed to change any of the headlight bulbs in either the driver or passenger side housing is a Torx T-30 star bit screwdriver.

Locate the two screws that hold the headlight assembly in place. One screw is near the outer edge and the other is at the inner corner.

Remove the two screws by turning them counter clockwise with a Torx T-30 star bit screwdriver. Set the two screws aside in a safe place.

Turn over the housing and rest it on the bumper. To avoid scratching the plastic lens or the painted bumper, place a towel in between them.

Pull off the rubber dust cap on the rear of the housing to access the base of the old low beam bulb.

Rotate the base of the bulb 1/4 turn counter clockwise to unlock it.

Pry up the black plastic tab on the electrical connector before sliding it straight off the bottom of the old bulb.

If you do get the new bulb dirty, wipe off the glass with an alcohol moistened paper towel.

Insert the new H11 low beam bulb in to the housing and rotate it 1/4 turn clockwise to lock it in place.

Push the rubber dust cap back in place over the low beam bulb access opening.

The High Beam bulb is located at the inner corner of the headlight housing.

Press in on the black plastic release button before sliding the power connector straight off.

Due to the round shape with one flat edge, the bulb can only be inserted in one way.

Push the rubber cover back in place over the high beam bulb opening.

Set the dust cap aside in a safe place.

Pull the old turn signal bulb straight out of the socket and push in a new # 7440 or W21W (clear glass) bulb.

Replace the black plastic dust cap and rotate it 1/4 turn clockwise to lock it.

Pull off the rubber dust caps for both the low beam bulb and the smaller oval cap for the side marker bulb.

Pull the old bulb straight out of the socket and push in a new amber colored # 168NA bulb.

The most challenging part of this procedure is re-inserting the socket in to the housing.

You may need to use a screwdriver or other tools to guide the small socket back in to its mounting location.

Then turn the side marker socket 1/4 turn clockwise to lock it in to place.

Line up the headlight housing and carefully push it back in to place on the front of the car.

Test the new bulbs by turning on the headlights, flashing the high beams, and activating the hazard signals.

For more, check out my other Ford Focus Repair & Maintenance Guides.