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: Brake / Parking # 3157 or 3157K, Rear Turn Signal # 3757A or 3757AK and Reverse # 921.

No tools are needed to replace the brake or rear turn signal bulbs.

To access the reverse light bulb, you'll need a standard Phillips head screwdriver.

Then locate the plastic access panel at the rear corner of the trunk.

Gently pull off the panel and set it aside in a safe place.

Behind the panel, you'll see two black plastic thumb screws that hold the tail light assembly in place.

Gently pull the tail light housing straight off the rear of the vehicle. If you have trouble removing the housing, try wiggling it back and forth while pulling. Do not use excessive force to avoid cracking the plastic lens.

Turn the housing over and rest it on the bumper to access the two bulb sockets.

The dual filament brake and parking light bulb is located at the bottom of the tail light housing.

Rotate the brown brake bulb socket 1/4 turn counter clockwise and pull it straight out of the housing.

The 3157 bulb is available from various manufacturers including Sylvania, GE, Philips and Wagner.

Re-insert the socket back in to the housing and rotate it 1/4 turn clockwise to secure it in place.

Rotate the socket 1/4 turn counter clockwise and pull it straight out.

Pull the old bulb straight out of the socket and push in a new amber colored number 3757A or 3757AK bulb.

Line up the tail light assembly with the corner of the vehicle.

Insert the metal peg in to the plastic grommet on the side of the vehicle.

Move to inside the trunk and spin on the two black plastic thumb screws by turning them clockwise. Tighten the fasteners until they are snug.

Avoid over tightening the thumb screws to prevent from cracking the plastic housing.

The reverse light bulb is located inside a separate housing in the trunk lid.

Loosen the plastic screw in the center of the fasteners with a Phillips head screwdriver by turning them counter clockwise.

You'll need to remove at least three of the trunk lid fasteners located around the rear of the reverse light housing.

Gently pull back the trunk lid liner.

Gently pull the reverse light housing straight off the trunk lid.

The housing is also held in place by two metal pegs that act as friction fasteners.

If you have trouble removing the housing, try wiggling it back and forth while pulling.

Rotate the socket 1/4 turn counter clockwise and pull it straight out of the housing.

If you would like to have brighter reverse lights, install some compatible 921 LED bulbs.

Re-insert the socket in to the housing and rotate it 1/4 turn clockwise to lock it in place.

Tighten the thumb screw by turning it clockwise until it is snug.

Test the new tail light bulbs by having someone step on the brake pedal, activate the hazard signals and place the transmission in reverse.

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