🔧 Crosstrek - Rear Window Regulator Replacement

The rear window regulator is the mechanism that raises and lowers the rear door glass. Replacing it means removing the rear door panel, supporting the glass safely, swapping the regulator assembly, then reassembling and testing.

Difficulty Level: Intermediate | Estimated Time: 1.5-3.0 hours (per door)

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⚠️ Safety & Precautions

• ⚠️ Keep fingers clear of the regulator while testing—pinch hazard.
• ⚠️ Support the glass with tape before loosening clamps, or it can drop and shatter.
• ⚠️ Disconnect the battery negative cable before unplugging door wiring to reduce the risk of shorting circuits.
• ⚠️ Use eye protection when popping trim clips—clips can fly.
• ⚠️ If the window is stuck down, handle the glass carefully; edges are sharp.

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🔧 Required Tools

You'll need the following tools for this repair:

• 10mm socket
• 10mm wrench
• 3/8" ratchet
• 3" socket extension (3/8")
• Phillips #2 screwdriver
• Plastic trim removal tool set
• Pick tool
• Needle-nose pliers
• Torque wrench (5–30 Nm range)
• Painter’s tape (1"–2")
• Razor blade or plastic scraper
• Work gloves
• Safety glasses
• Magnetic parts tray

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Rear window regulator assembly (Left or Right, as needed) - Qty: 1
• Rear window regulator motor (if not included with regulator) - Qty: 1
• Rear door trim panel clips - Qty: 6-10
• Butyl tape (vapor barrier adhesive) - Qty: 1

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📋 Before You Begin

• Park on level ground and switch ignition OFF.
• Lower the rear window to about halfway if it still moves (this lines up the glass clamp bolts with the access holes).
• Use a 10mm socket to disconnect the battery negative terminal and isolate it so it can’t spring back.
• Take photos as you go for reassembly.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Assumption: This procedure covers either rear door; steps are the same left or right.

Step 1: Remove the rear door switch panel

• Use a plastic trim removal tool set to gently pry up the rear window switch bezel.
• Unplug the switch connector using a pick tool to lift the locking tab (the locking tab is the small plastic catch that holds the plug in).
• Set the switch panel aside.

Step 2: Remove screws and release the door panel

• Remove the screw behind the inner door handle trim using a Phillips #2 screwdriver.
• Remove the armrest screw(s) using a Phillips #2 screwdriver (location varies slightly by panel).
• Use a plastic trim removal tool set to pop the door panel clips around the edges.
• Lift the door panel straight up to unhook it from the window ledge.

Step 3: Disconnect cables/connectors and remove the door panel

• Unplug any remaining connectors using a pick tool (speaker, courtesy light if equipped).
• For the inner handle cable: use needle-nose pliers to rotate the plastic retainer out, then unhook the cable end.
• Set the door panel somewhere safe.

Step 4: Peel back the vapor barrier (moisture sheet)

• Carefully peel the plastic vapor barrier back using a plastic scraper.
• If the butyl adhesive strings, cut it cleanly with a razor blade or plastic scraper.
• Don’t tear it—water leaks happen fast.

Step 5: Support the glass

• If the glass is still clamped to the regulator, use the window openings to locate the clamp bolts.
• Run 2–4 long strips of painter’s tape (1"–2") from the outside of the glass up over the door frame and back down (this holds the glass up).
• Wear work gloves and safety glasses while working around the glass.

Step 6: Separate the glass from the regulator

• Through the access holes, loosen (do not fully remove) the glass clamp bolts using a 10mm socket and 3/8" ratchet.
• Once loose, lift the glass fully up by hand and add extra painter’s tape (1"–2") to secure it.

Step 7: Remove the regulator/motor electrical connector

• Unplug the regulator motor connector using a pick tool to release the lock.
• Move the harness aside so it won’t snag.

Step 8: Unbolt and remove the regulator assembly

• Remove the regulator mounting bolts using a 10mm socket, 3/8" ratchet, and 3" socket extension (3/8").
• If your replacement does not include the motor, remove the motor from the regulator using a 10mm socket.
• Wiggle the regulator out through the largest access opening.
• Torque note (common spec on this platform): Regulator-to-door bolts Torque to 7.5 Nm (5.5 ft-lbs); Motor bolts Torque to 3.5 Nm (2.6 ft-lbs).

Step 9: Install the new regulator (and motor if needed)

• Slide the new regulator into the door and start all bolts by hand using a 10mm socket (hand-starting prevents cross-threading).
• Tighten the mounting bolts evenly using a torque wrench (5–30 Nm range): Torque to 7.5 Nm (5.5 ft-lbs).
• If transferring the motor, install it using a 10mm socket and tighten with a torque wrench (5–30 Nm range): Torque to 3.5 Nm (2.6 ft-lbs).
• Reconnect the motor connector until it clicks.

Step 10: Re-clamp the glass to the regulator

• Carefully lower the glass onto the regulator clamps (remove some tape as needed, but keep one strip holding the glass).
• Tighten the clamp bolts using a 10mm socket and 3/8" ratchet.
• Torque note (common spec on this platform): Glass clamp bolts Torque to 7.5 Nm (5.5 ft-lbs).

Step 11: Reinstall the vapor barrier

• Press the vapor barrier back into the butyl adhesive firmly by hand.
• If it won’t stick, apply new butyl tape and press the plastic into it all the way around.

Step 12: Reinstall the door panel

• Reconnect the inner handle cable using needle-nose pliers and lock the retainer back into place.
• Reconnect any electrical connectors (speaker/light) by pushing until they click.
• Hook the top of the panel onto the window ledge, then press the clips in around the perimeter using your hands.
• Reinstall screws using a Phillips #2 screwdriver.
• Reinstall the switch panel and plug it in.

Step 13: Reconnect the battery

• Reconnect the negative battery terminal using a 10mm socket and 3/8" ratchet.

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✅ After Repair

• Cycle the rear window fully down and fully up 3–5 times to confirm smooth travel and correct alignment.
• Listen for clicking/popping—if present, re-check that the regulator bolts are tight and the harness is not snagging.
• Check the door for water leaks later: after a car wash, confirm the carpet and door panel are dry.

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💰 DIY vs Shop Cost

Shop Cost: $350-$750 (parts + labor, per door)

DIY Cost: $90-$250 (parts only, per door)

You Save: $260-$500 by doing it yourself!

Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 1.5-3.0 hours.

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