2015-2019 Lincoln MKC Rear Window Regulator: Diagnosing Noises, Drops, and Failures

Symptoms of a Failing Window Regulator

When a window regulator starts to fail, it usually gives several warning signs. Ignoring them can lead to the window becoming completely stuck or, worse, dropping inside the door. Here’s what to look and listen for:

• Grinding or Clicking Noises: A grinding or chattering sound when you press the window button is a classic sign of a problem. This noise is often caused by a frayed cable or a damaged gear inside the motor assembly. If you hear the motor running but the window isn't moving, the regulator's cable has likely snapped or come off its pulley.
• Slow or Erratic Movement: If the window moves much slower than it used to, struggles to go up, or moves in a jerky motion, the regulator is likely binding or the motor is straining. It might also go up and then immediately reverse direction a few inches.
• Crooked Window: A window that tilts and doesn't stay level as it moves up or down indicates that one of the lift points on the regulator has broken or detached from the glass. This puts stress on the remaining components and the window glass itself.
• Window Drops Inside the Door: This is a complete failure. A loud 'pop' or 'snap' followed by the window glass disappearing into the door means the cable has broken or a critical plastic component has failed. The window can no longer support its own weight.

Diagnosing the Problem: Regulator, Motor, or Switch?

Before buying parts, it's important to figure out what has actually failed. The issue is usually the regulator, the motor, or the switch.

1. The Switch Test: If nothing happens and you hear no sound at all from the door when you press the button, the problem could be the switch or a fuse. Try operating the same window from the master switch on the driver's door. If it works from one switch but not the other, the switch is likely the problem.
2. The Motor Test: Press and hold the window button. If you hear a clicking or whirring sound coming from inside the door panel, it means the switch is working and the motor is receiving power. If the window isn't moving despite the noise, the mechanical regulator has failed. This is the most common scenario.
3. The Silent Treatment: If you hear no noise from the door when pressing a known-good switch, the window motor itself may have burned out, or there could be an electrical issue preventing power from reaching it.

Known Issues, TSBs, and Recalls

While there are no recalls for the window regulators on the 2015-2019 Lincoln MKC, there are some important related items to be aware of:

• No Recalls for Window Regulators: Searches of the National Highway Traffic Safety Administration (NHTSA) database show no recalls specifically for window regulator failure on this vehicle.
• TSB 19-2092: For some 2019 MKC models, Ford issued a Technical Service Bulletin for intermittent power window and mirror function from the driver's master switch. This was caused by water getting into an electrical connector in the B-pillar. If your windows are acting up intermittently and you have a 2019 model, this could be the cause rather than a bad regulator.
• Major Fire Risk Recall: It is critical to note that all 2015-2019 Lincoln MKC models were recalled (NHTSA Campaign #23V378000) for a serious fire risk from the battery monitor sensor, which can short circuit even when the vehicle is parked and off. Owners are advised to park outside until this recall repair is performed by a dealer. This is unrelated to the window regulator but is a critical safety issue for all owners.

Buying a Used Window Regulator

A used OEM regulator is an excellent, cost-effective option. Since the part includes the motor, you are getting the complete factory-engineered assembly. Here’s what to check before buying:

• Verify the Part Number: Ensure the part is listed as OEM number EJ7Z-7827000-B or Motorcraft number WLRA-267. It must be for the Rear Passenger (Right) side.
• Inspect the Cables: Look closely at the cables where they are visible. They should be tightly wound and free of any fraying, kinks, or rust. A frayed cable is a regulator that's about to fail.
• Check the Plastic Pulleys: Inspect the plastic wheels (pulleys) that the cables run on. They should be intact, without cracks or chips. A broken pulley will cause the cable to jam or come off.
• Examine the Motor Connector: The electrical connector on the motor should be clean, with no bent or corroded pins. The plastic housing should not be cracked or damaged.
• Glass Mounts: Check the plastic clips that attach to the window glass. Ensure they are not cracked or broken, as this will prevent the window from being secured properly.

Cost of Replacement

The cost to replace a rear window regulator on a 2015-2019 Lincoln MKC can vary significantly depending on the parts you choose and who does the labor.

Replacement Overview & Window Re-Learn

Replacing the regulator is a moderately difficult job that a skilled DIYer can handle in about 1-2 hours. The basic steps involve:

1. Removing the interior door panel.
2. Peeling back the vapor barrier.
3. Temporarily securing the window glass in the 'up' position with tape or a suction cup.
4. Disconnecting the electrical connector from the motor.
5. Unbolting the old regulator assembly from the door.
6. Removing the old assembly and installing the new one.
7. Transferring the window glass to the new regulator.
8. Reassembling the door.

Frequently Asked Questions (FAQ)