How to Replace the Front Window Regulator on a 2021 Honda Passport (Driver or Passenger)
Step-by-step door panel removal, glass support tips, parts/tools list, and auto-up/down window reset
How to Replace the Front Window Regulator on a 2021 Honda Passport (Driver or Passenger)
Step-by-step door panel removal, glass support tips, parts/tools list, and auto-up/down window reset


đź”§ Passport - Front Window Regulator Replacement
The front window regulator is the cable-and-track assembly that moves the glass up and down. On your Passport, replacing it requires removing the front door panel, securing the glass, swapping the regulator (and sometimes the motor), then reinitializing the auto-up/down feature.
Difficulty Level: Intermediate | Estimated Time: 2-3 hours (one door)
⚠️ Safety & Precautions
- ⚠️ Your Passport’s front doors typically contain a side airbag—disconnect the battery before working inside the door.
- ⚠️ Disconnect the negative battery cable and wait at least 3 minutes before unplugging any door connectors.
- ⚠️ Support the window glass at all times—if it drops, it can shatter or cut you.
- ⚠️ Keep fingers clear of the regulator tracks/cables during testing.
đź”§ Required Tools
You'll need the following tools for this repair:
- Safety glasses
- Mechanic gloves
- Trim removal tool set
- Phillips screwdriver
- Flat-blade screwdriver
- 10mm socket
- 1/4" drive ratchet
- 6" extension (1/4" drive)
- Torque wrench (in-lb or low-range ft-lb)
- Painters tape (1"-2" wide)
- Plastic razor blade or gasket scraper
- Needle-nose pliers
- Work light
🔩 Required Parts
HowToo sells all the parts you need for this repair:
- Front window regulator (LH or RH, matching the door) - Qty: 1
- Front window regulator motor (if not included with regulator) - Qty: 1
- Door panel trim clips (front door) - Qty: 1 set
- Butyl tape (door vapor barrier adhesive) - Qty: 1
đź“‹ Before You Begin
- Park on level ground, ignition OFF, and keep the key fob away from the vehicle.
- Lower the window until you can access the glass-to-regulator fasteners (if the regulator still moves at all).
- Disconnect the battery negative terminal using a 10mm socket, then wait at least 3 minutes.
- Take photos of connectors and clip locations.
🔨 Step-by-Step Instructions
Follow these steps in order:
Step 1: Confirm which front regulator you’re replacing
- Is it the front driver (LH) or front passenger (RH) door?
- Is your replacement part a regulator with motor or regulator only?
- Reply with LH/RH and “with motor” or “regulator only”.
Step 2: Remove the front door trim panel
- Use a trim removal tool set to carefully pry off the small trim covers near the interior handle/armrest (locations vary by door).
- Remove the exposed screws using a Phillips screwdriver.
- Starting at the bottom edge, pop the panel clips free using a trim removal tool set. (A trim tool is a plastic pry tool that releases clips without damaging panels.)
- Lift the door panel upward to unhook it from the window ledge.
- Unplug the electrical connectors (window switch, courtesy light, etc.). Use a flat-blade screwdriver only to gently release locking tabs if needed.
Step 3: Peel back the vapor barrier
- Use a plastic razor blade or gasket scraper to separate the vapor barrier without tearing it.
- Stick it aside where it won’t pick up dirt. If the butyl adhesive won’t reseal, plan to use butyl tape on reassembly.
Step 4: Secure the window glass
- If the regulator still works: reconnect the window switch temporarily and reconnect the battery negative with a 10mm socket, then move the glass until the glass fasteners are visible through the door access holes. Disconnect the battery again and wait 3 minutes.
- Use painters tape (1"-2" wide) to tape the glass to the door frame (multiple strips over the top of the door).
- If the glass is loose or wants to drop, have a helper hold it from the top edge while you loosen the clamps.
Step 5: Detach the glass from the regulator
- Locate the glass-to-regulator clamp/bolts through the access holes.
- Use a 10mm socket and 1/4" drive ratchet to loosen/remove the fasteners.
- Slide the glass fully up by hand and add more painters tape to hold it securely.
- Torque on reassembly: Torque to Honda specification using a torque wrench (in-lb or low-range ft-lb).
Step 6: Unplug the regulator motor and remove the regulator assembly
- Unplug the regulator motor connector from inside the door.
- Remove the regulator mounting bolts using a 10mm socket, 1/4" drive ratchet, and 6" extension.
- Carefully maneuver (“snake”) the regulator out through the large service opening. Go slow to avoid bending it into the glass.
- Torque on reassembly: Torque to Honda specification using a torque wrench (in-lb or low-range ft-lb).
Step 7: If needed, transfer the motor to the new regulator
- If your new part is regulator only, remove the motor screws/bolts from the old regulator using the same driver style present on your door (commonly 10mm socket or Phillips screwdriver).
- Install the motor onto the new regulator and snug fasteners evenly.
- Torque on reassembly: Torque to Honda specification using a torque wrench (in-lb or low-range ft-lb).
Step 8: Install the new regulator and attach the glass
- Position the new regulator into the door and start all bolts by hand to prevent cross-threading.
- Tighten the regulator mounting bolts with a 10mm socket, then Torque to Honda specification with a torque wrench (in-lb or low-range ft-lb).
- Plug in the regulator motor connector.
- Lower the glass carefully into the clamps, install the glass fasteners using a 10mm socket, then Torque to Honda specification with a torque wrench (in-lb or low-range ft-lb).
Step 9: Function test before reassembly
- Reconnect the battery negative terminal using a 10mm socket.
- Turn ignition ON and run the window up/down several times, listening for clicking or binding.
- If the glass tilts or binds, loosen the regulator bolts slightly with a 10mm socket, align, then retighten and re-test.
- Turn ignition OFF and disconnect the battery again with a 10mm socket before reinstalling the vapor barrier and panel.
Step 10: Reinstall vapor barrier and door panel
- Reapply the vapor barrier. Add butyl tape if the original adhesive won’t stick.
- Reconnect all door electrical connectors.
- Hang the door panel on the top ledge, then press clips in around the perimeter (use new door panel trim clips as needed).
- Reinstall screws using a Phillips screwdriver and snap trim covers back on using a trim removal tool set.
- Reconnect the battery negative terminal using a 10mm socket.
Step 11: Reinitialize the auto-up/down window function
- Turn ignition ON.
- Fully lower the window, then keep holding the switch DOWN for about 2 seconds.
- Fully raise the window, then keep holding the switch UP for about 2 seconds.
- Test one-touch up/down to confirm it’s restored.
âś… After Repair
- Verify the window goes fully up/down smoothly and seals evenly against the weatherstrip.
- Confirm door locks, mirror, speaker, and handle functions work (connector check).
- Check for air/wind noise on a short drive; recheck glass alignment if needed.
đź’° DIY vs Shop Cost
Shop Cost: $450-$900 (parts + labor)
DIY Cost: $120-$350 (parts only)
You Save: $330-$550 by doing it yourself!
Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 2-3 hours.
🎯 Ready to get started?
HowToo makes it easy: same-day/2-day shipping on every part, plus all the tools and specialty tools you need! Check out the parts and tools sections below to add everything to your cart.

















