🔧 Tucson - Rear Window Regulator Replacement

This repair replaces the rear door window regulator, which is the cable-and-track assembly that moves the rear glass up and down. On your Tucson, the regulator is accessed by removing the rear door trim panel, peeling back the vapor barrier, supporting the glass, and unbolting the regulator from inside the door.

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

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⚠️ Safety & Precautions

• ⚠️ Disconnect the negative battery cable before unplugging rear door wiring connectors.
• ⚠️ Support the glass with tape before loosening the regulator-to-glass bolts.
• ⚠️ Keep fingers away from the regulator track and cable while testing the window.
• ⚠️ Do not tear the vapor barrier; it keeps rainwater out of the cabin.
• ⚠️ If the glass has fallen into the door, have a helper hold it while you secure it.

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🔧 Required Tools

You'll need the following tools for this repair:

• 10mm socket
• 12mm socket
• 3/8-inch ratchet
• 3/8-inch extension 6-inch
• Phillips #2 screwdriver
• Flat blade screwdriver
• Plastic trim removal tool set
• Panel clip pliers
• Needle nose pliers
• Painter's tape 2-inch
• Torque wrench 2-20 Nm
• Magnetic parts tray
• Shop towels
• Nitrile 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 motor is included or failed
• Rear door trim panel clips - Qty: As needed
• Butyl vapor barrier sealant - Qty: 1 roll if original seal is damaged

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📋 Before You Begin

• 🅿️ Park your Tucson on level ground and shift into Park.
• 🔑 Turn the ignition OFF and remove the key.
• 🪟 If the rear window still moves, position it so the glass mounting bolts line up with the access openings in the door.
• 🔋 Use a 10mm socket to disconnect the negative battery cable, then wait 2 minutes before unplugging connectors.
• 🧰 A window regulator is the metal rail, cable, and slider assembly that physically lifts the glass.
• 🧰 A vapor barrier is the plastic moisture sheet behind the door panel that stops water from entering the cabin.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Remove the Rear Door Screw Covers

• Use a plastic trim removal tool set to gently remove the screw cover inside the rear door pull pocket.
• Use a plastic trim removal tool set to remove the screw cover behind the inside rear door handle.
• Place the small covers in a magnetic parts tray.
• Go slow to avoid scratches.

Step 2: Remove the Rear Door Panel Screws

• Use a Phillips #2 screwdriver to remove the screw in the rear door pull pocket.
• Use a Phillips #2 screwdriver to remove the screw behind the inside rear door handle.
• If your door panel has a lower screw, remove it with a Phillips #2 screwdriver.
• Keep all screws in a magnetic parts tray.

Step 3: Release the Rear Door Trim Panel

• Use a plastic trim removal tool set at the lower rear edge of the door panel.
• Pry outward near each trim clip until it pops free.
• Continue around the bottom and side edges of the panel.
• Use panel clip pliers if any clips stay stuck in the metal door.
• Lift the door panel upward to unhook it from the window ledge.

Step 4: Disconnect Rear Door Wiring and Handle Cable

• Hold the rear door panel close to the door so the harness is not stretched.
• Use a flat blade screwdriver to press the lock tab on the rear power window switch connector, then unplug it.
• Use needle nose pliers or your fingers to unhook the inside handle cable from the door handle lever.
• Set the panel on shop towels with the finished side facing up.

Step 5: Peel Back the Rear Door Vapor Barrier

• Use a plastic trim removal tool set to gently lift the vapor barrier away from the black butyl seal.
• Use painter's tape 2-inch to hold the vapor barrier out of the way.
• If the butyl seal stretches, fold it back onto the door so it stays clean.
• If the plastic tears, reseal it later with butyl vapor barrier sealant.

Step 6: Position the Rear Glass for Bolt Access

• If the regulator still moves, temporarily plug the rear window switch connector back in by hand.
• Use a 10mm socket to temporarily reconnect the negative battery cable.
• Turn the ignition ON.
• Move the rear window until the glass mounting bolts are visible through the access openings.
• Turn the ignition OFF.
• Use a 10mm socket to disconnect the negative battery cable again.
• If the regulator does not move, skip power operation and support the glass where it sits.

Step 7: Support the Rear Window Glass

• Raise the rear glass fully by hand if possible.
• Apply several long strips of painter's tape 2-inch from the outside glass over the top of the door frame to the inside glass.
• Use enough tape that the glass cannot slide down while the regulator is removed.
• If the glass is heavy or unstable, ask a helper to hold it.
• More tape is safer.

Step 8: Separate the Glass From the Regulator

• Use a 10mm socket, 3/8-inch ratchet, and 3/8-inch extension 6-inch to loosen the glass mounting bolts.
• Do not let the glass drop when the bolts loosen.
• If the design uses clamp bolts, loosen them enough to free the glass.
• If the design uses bolts through the glass tabs, remove the bolts and place them in the magnetic parts tray.
• Lift the glass fully up and secure it again with painter's tape 2-inch.

Step 9: Disconnect the Rear Window Motor Connector

• Use a flat blade screwdriver to gently press the lock tab on the rear window motor connector.
• Pull the connector straight out of the motor.
• Do not pull on the wires.

Step 10: Remove the Rear Window Regulator

• Use a 10mm socket, 3/8-inch ratchet, and 3/8-inch extension 6-inch to remove the regulator rail bolts.
• Use a 10mm socket to remove the window motor mounting bolts if the motor is part of the regulator assembly.
• If any mounting bolt is larger on your replacement setup, use a 12mm socket.
• Support the regulator with one hand before removing the last bolt.
• Guide the regulator and motor assembly out through the large service opening in the rear door.

Step 11: Transfer the Motor if Needed

• If the new regulator does not include a motor, lay the old regulator on shop towels.
• Use a 10mm socket or Phillips #2 screwdriver to remove the motor fasteners.
• Install the motor onto the new regulator in the same orientation.
• Use a torque wrench 2-20 Nm to tighten the motor fasteners to Torque to 5-7 Nm (44-62 in-lbs).

Step 12: Install the New Rear Window Regulator

• Guide the new regulator into the rear door through the service opening.
• Start all bolts by hand first to avoid cross-threading.
• Use a 10mm socket, 3/8-inch ratchet, and 3/8-inch extension 6-inch to snug the regulator bolts.
• Use a torque wrench 2-20 Nm to tighten the regulator mounting bolts to Torque to 8-10 Nm (71-89 in-lbs).
• Plug the rear window motor connector in by hand until it clicks.

Step 13: Reattach the Glass to the Regulator

• Carefully loosen the painter's tape 2-inch while keeping one hand on the glass.
• Lower the rear glass into the regulator clamps or mounting points.
• Make sure the glass sits evenly in the front and rear window channels.
• Use a 10mm socket to tighten the glass mounting bolts.
• Use a torque wrench 2-20 Nm to tighten the glass mounting bolts to Torque to 8-10 Nm (71-89 in-lbs).

Step 14: Test the Rear Window Before Reassembly

• Reconnect the rear window switch connector by hand.
• Use a 10mm socket to reconnect the negative battery cable.
• Turn the ignition ON.
• Run the rear window fully down and fully up several times.
• Watch for smooth travel and listen for grinding, popping, or cable noise.
• If the glass binds, turn ignition OFF and use a 10mm socket to slightly loosen the glass bolts, align the glass, then retighten to Torque to 8-10 Nm (71-89 in-lbs).

Step 15: Reseal the Vapor Barrier

• Turn the ignition OFF.
• Use a 10mm socket to disconnect the negative battery cable before final panel installation.
• Press the vapor barrier back into the original butyl seal by hand.
• Use butyl vapor barrier sealant if the original seal no longer sticks.
• Use shop towels to clean any dirt from the sealing area.

Step 16: Reinstall the Rear Door Trim Panel

• Reconnect the inside handle cable by hand or with needle nose pliers.
• Reconnect the rear window switch connector by hand until it clicks.
• Hook the top edge of the rear door panel over the window ledge.
• Align the trim clips with the holes in the metal door.
• Press around the panel edges by hand until all clips snap into place.
• Install new rear door trim panel clips anywhere clips are broken or loose.

Step 17: Reinstall the Screws and Covers

• Use a Phillips #2 screwdriver to reinstall the rear door pull screw.
• Use a Phillips #2 screwdriver to reinstall the screw behind the inside rear door handle.
• Use a Phillips #2 screwdriver to reinstall any lower trim screw if equipped.
• Snap the screw covers back into place by hand.

Step 18: Final Electrical and Function Check

• Use a 10mm socket to reconnect the negative battery cable.
• Turn the ignition ON.
• Test the rear window from the rear door switch.
• Test the rear window from the driver master switch.
• Test the door lock, inside handle, and child safety lock.
• Confirm the door opens and closes normally.

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✅ After Repair

• ✅ Run the repaired rear window fully up and down at least 5 times.
• ✅ Make sure the glass stays straight and does not slow near the top.
• ✅ Check that the rear door panel sits flush with no loose clips.
• ✅ After rain or a wash, check the rear footwell for water if the vapor barrier was disturbed.
• ✅ Reset the clock or radio presets if the battery disconnect cleared them.

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💰 DIY vs Shop Cost

Shop Cost: $280-$600 per rear door (parts + labor)

DIY Cost: $70-$230 per rear door (parts only)

You Save: $210-$370 per rear door by doing it yourself!

Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 1.2-2.0 hours per door.

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