🔧 Focus - Rear Window Regulator Replacement

The rear window regulator is the mechanism inside the door that moves the glass up and down. On your Focus, the rear door panel must be removed, the glass supported, and the regulator assembly replaced inside the rear door.

Difficulty Level: Intermediate | Estimated Time: 1.5-2.5 hours per door

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⚠️ Safety & Precautions

• ⚠️ Support the window glass before unbolting the regulator. Unsupported glass can drop suddenly and break.
• ⚠️ Disconnect the negative battery cable before unplugging door electrical connectors.
• ⚠️ Wear gloves because the inside of the door has sharp stamped-metal edges.
• ⚠️ Do not slam or close the door while the glass is loose.
• ⚠️ Keep fingers away from the regulator arms and cable path during testing.

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🔧 Required Tools

You'll need the following tools for this repair:

• 10mm socket
• 8mm socket
• 7mm socket
• Ratchet
• 6-inch extension
• Torx T20 screwdriver
• Torx T25 screwdriver
• Trim removal tool set
• Small flat-blade screwdriver
• Painter’s tape
• Pick tool
• Needle-nose pliers
• Torque wrench, inch-pound
• Work gloves
• Safety glasses

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Rear window regulator assembly - Qty: 1 per door
• Rear window regulator with motor assembly - Qty: 1 per door, if the motor is included or failed
• Rear door trim panel clips - Qty: 4-8 per door
• Butyl sealing tape - Qty: 1 roll

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📋 Before You Begin

• Park your Focus on level ground and turn the ignition off.
• Lower the affected rear window about halfway if it still moves. This makes the glass clamp bolts easier to reach.
• If the window will not move, you can still remove the regulator, but you may need to move the glass by hand after loosening the clamps.
• Open the rear door fully and place tools where they cannot scratch the paint.
• Disconnect the negative battery cable with a 10mm socket. Wait 2 minutes before unplugging door wiring.
• A trim removal tool is a plastic pry tool used to release panels without gouging the door trim.
• Butyl sealing tape is sticky black rope-style sealant used to reseal the water shield behind the door panel.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Remove the rear door switch trim

• Use a trim removal tool to gently lift the rear window switch trim from the armrest.
• Use a small flat-blade screwdriver to press the connector tab, then unplug the switch.
• Set the switch trim aside where it will not get scratched.
• Tip: Pry slowly to avoid broken tabs.

Step 2: Remove hidden door panel screws

• Use a small flat-blade screwdriver or pick tool to remove small screw covers from the pull handle and lower trim area.
• Use a Torx T20 screwdriver or Torx T25 screwdriver to remove the exposed door panel screws.
• Use a 7mm socket or 8mm socket if your door panel uses small hex-head screws.
• Keep the screws grouped so they go back in the same locations.

Step 3: Release and remove the rear door panel

• Use a trim removal tool at the lower rear corner of the panel to pop the first retaining clip loose.
• Work around the bottom and sides with the trim removal tool until all clips release.
• Lift the panel straight upward to unhook it from the window ledge.
• Use needle-nose pliers to release the interior door handle cable from the handle lever.
• Unplug any remaining electrical connectors by pressing their lock tabs with a small flat-blade screwdriver.
• Tip: Do not yank the panel away.

Step 4: Remove the water shield

• Wear work gloves before reaching inside the door.
• Use a trim removal tool to carefully peel the foam or plastic water shield away from the door.
• If the black sealant stretches, use a small flat-blade screwdriver to help separate it cleanly.
• Do not tear the shield. It keeps rainwater away from the door panel.

Step 5: Support the rear window glass

• Raise the glass fully by hand if needed.
• Use painter’s tape to tape the glass to the outside upper door frame.
• Apply at least three vertical strips of painter’s tape from the glass over the top of the door frame.
• Gently tug the glass downward by hand to confirm it is secure.
• Tip: Use more tape than you think.

Step 6: Loosen the glass clamp bolts

• Look through the access holes in the inner door metal to find the window glass clamp bolts.
• Use an 8mm socket, ratchet, and 6-inch extension to loosen the glass clamp bolts.
• Do not fully remove the clamp bolts unless the replacement regulator design requires it.
• Carefully separate the glass from the regulator sliders by hand.

Step 7: Remove the window regulator

• Unplug the window motor connector using a small flat-blade screwdriver to release the connector lock.
• Use a 10mm socket, ratchet, and 6-inch extension to remove the regulator mounting bolts.
• If your replacement does not include a motor, use a Torx T25 screwdriver to remove the motor from the old regulator.
• Guide the regulator assembly out through the large access opening in the door.
• Tip: Rotate the regulator to clear the opening.

Step 8: Install the new rear window regulator

• Guide the new regulator assembly into the door through the access opening.
• Align the mounting holes by hand first.
• Use a 10mm socket, ratchet, and 6-inch extension to start all regulator mounting bolts by hand before tightening.
• Use a torque wrench, inch-pound with a 10mm socket to tighten the regulator bolts to Torque to 9 Nm (80 in-lbs).
• Plug in the window motor connector until it clicks.

Step 9: Attach the glass to the regulator

• Carefully remove enough painter’s tape to lower the glass into the regulator clamps by hand.
• Make sure the glass sits evenly in both clamps.
• Use an 8mm socket and torque wrench, inch-pound to tighten the glass clamp bolts to Torque to 6 Nm (53 in-lbs).
• Reapply painter’s tape loosely until testing is complete.

Step 10: Test the regulator before reassembly

• Reconnect the negative battery cable using a 10mm socket.
• Temporarily plug the rear window switch back in by hand.
• Turn the ignition on and run the rear window fully down and up.
• Watch the glass for smooth movement and proper sealing at the top.
• If the glass tilts, loosen the clamp bolts with an 8mm socket, realign the glass, and retighten to Torque to 6 Nm (53 in-lbs).
• Turn the ignition off and disconnect the negative battery cable again with a 10mm socket before final reassembly.

Step 11: Reinstall the water shield

• Use your fingers and a trim removal tool to press the water shield back onto the door.
• Use butyl sealing tape anywhere the original black sealant no longer sticks.
• Make sure all lower edges are sealed so water drains inside the door shell, not onto the trim panel.

Step 12: Reinstall the rear door panel

• Reconnect the interior handle cable using needle-nose pliers.
• Reconnect all electrical connectors by hand until each clicks.
• Hang the door panel over the upper window ledge by hand.
• Line up the retaining clips and press around the panel edges with your palm.
• Use a Torx T20 screwdriver, Torx T25 screwdriver, 7mm socket, or 8mm socket to reinstall the original screws.
• Tighten small door panel screws snug only: Torque to 2 Nm (18 in-lbs).
• Snap the screw covers back in by hand.

Step 13: Reconnect power and final-test the window

• Reconnect the negative battery cable using a 10mm socket.
• Tighten the battery terminal nut to Torque to 5 Nm (44 in-lbs).
• Turn the ignition on and test the rear window from both the rear door switch and the driver master switch.
• Make sure the window goes fully up, fully down, and seals evenly.

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✅ After Repair

• ✅ Check that the rear door locks, handle, speaker, and window switch all work.
• ✅ Spray a small amount of water over the outside of the repaired door and check inside for leaks around the water shield area.
• ✅ Listen for grinding, popping, or cable noise. Any of these means the glass may not be seated correctly.
• ✅ If one-touch window operation needs relearning, hold the switch down until the window fully opens, then hold it for 2 extra seconds. Raise it fully and hold the switch up for 2 extra seconds.

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💰 DIY vs Shop Cost

Shop Cost: $300-$550 per rear door (parts + labor)

DIY Cost: $80-$220 per rear door (parts only)

You Save: $220-$330 per rear door by doing it yourself!

Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 1.0-1.5 hours per door.

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🎯 Ready to get started?

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