2012-2018 Ford Focus Rear Window Regulator and Motor: A Buyer's and DIY Guide

Symptoms of a Failing Window Motor and Regulator

When a window regulator or motor begins to fail, it usually provides a few warning signs. Recognizing them can help you diagnose the problem before the window gets stuck open or closed.

• Grinding or Clicking Noises: A grinding or clicking sound when you press the window switch often points to a problem with the regulator's cables or the motor's internal gears. The cable might be frayed or the plastic gear inside the motor could be stripped.
• Slow or Erratic Window Speed: If the window moves noticeably slower than it used to, or if it speeds up and slows down on its way up or down, the motor is likely losing power or the regulator is binding.
• Window Drops Suddenly: A loud 'pop' followed by the window glass sliding down into the door is a classic sign of a snapped regulator cable or a broken plastic guide. The motor may still make a whirring sound, but the glass is no longer attached to the lifting mechanism.
• Window is Crooked: If the glass tilts to one side as it moves, it means one of the regulator's lift points has broken or a guide has come off its track.
• No Response from Switch: If nothing happens and you don't hear any sound from the motor, the problem could be the motor, the switch, or a fuse. A common diagnostic step is to press the switch while giving the inside door panel a firm thump near the motor's location. If this temporarily restores function, it's a strong indicator of a worn-out motor.

Diagnosing the Problem: Motor, Switch, or Fuse?

Before buying a new part, follow these steps to isolate the issue:

1. Check the Fuse: This is the easiest and cheapest first step. For the 2012-2018 Focus, the fuse for the rear power windows is often a 25-amp fuse located in the engine compartment fuse box, specifically at position F14. 🎬 Watch: How to find and check your window fuse Always consult your owner's manual to confirm the exact location and rating.
2. Test the Switches: Try operating the window from both the master switch on the driver's door and the switch on the rear door itself. If it works with one switch but not the other, the switch is the likely culprit, not the motor assembly.
3. Listen for the Motor: Have a helper press the switch while you listen closely to the inside of the door. If you hear a click or a humming/whirring sound, the motor is receiving power. If there's a sound but no movement, the regulator is almost certainly the problem (e.g., snapped cable). If there is no sound at all (and the fuse is good), the issue is likely the motor or the wiring leading to it.

Buying a Used 2012-2018 Focus Window Motor Assembly

Purchasing a used OEM window regulator assembly can be a smart way to save money, as they are often more durable than inexpensive aftermarket alternatives. Here’s what to look for.

Why Choose a Used OEM Assembly?

Original Equipment Manufacturer (OEM) parts are designed by Ford specifically for the Focus, ensuring proper fit, consistent motor speed, and correct electrical connections. While some aftermarket parts are high quality, many cheaper options can have issues with fitment, noisy operation, or premature failure of plastic components.

What to Inspect Before You Buy

• Verify Part Numbers: The surest way to guarantee fitment is to match the part number. Look for CM5Z-5827001-A or its predecessors, CP9Z5827001A and CM51A27001AC.
• Check the Electrical Connector: Ensure the connector on the used part matches your vehicle's harness. The non-one-touch version typically has a simpler, 2-pin connector.
• Inspect the Cables: Look closely at the steel cables. They should be taut and free of any fraying, kinks, or rust. Frayed cables are a sign of imminent failure.
• Examine Plastic Parts: Check all plastic guides, pulleys, and the main motor gear (if visible) for cracks, stress marks, or excessive wear. These are the most common failure points.
• Look for Corrosion: Inspect the metal frame and the motor housing for any signs of rust or water damage, which can indicate a hard life and potential electrical issues.

Replacement Overview

Replacing the rear window regulator is a moderately difficult job that a DIYer with some experience can handle. The basic steps involve removing the interior door panel, carefully peeling back the vapor barrier, disconnecting the window glass from the regulator, unbolting the old assembly, and then installing the new one in reverse order. Special care must be taken when handling the window glass to prevent it from dropping and breaking.

Cost Comparison

Known Issues, TSBs, and Recalls

For the 2012-2018 Ford Focus, there are no specific recalls or widespread Technical Service Bulletins (TSBs) directly targeting the rear window motor or regulator assembly. Most failures are due to normal wear and tear over time. However, Ford did issue recalls for door latch components on these models (Recall 16S30), which could prevent doors from closing properly, but this is unrelated to the window lift mechanism. 🎬 Learn more about common Ford Focus door latch recalls There were also recalls related to the canister purge valve that could cause stalling, but this does not affect the windows.

Frequently Asked Questions (FAQ)