1995-2000 Contour & Mystique Rear Window Regulator: Why They Fail and How to Replace Them

Symptoms of a Failing Window Regulator

When a window regulator starts to fail on a Ford Contour or Mercury Mystique, the signs are usually hard to ignore. Because the system relies on cables and plastic parts, these are the most common points of failure. Here’s what to look and listen for:

• Grinding or Clicking Noises: This is the most common symptom. It often means the cable has started to fray or has come off the pulley and is getting tangled, or the plastic gear on the motor is stripped.
• Window Drops Inside the Door: If the window suddenly falls into the door with a loud thud, the cable has likely snapped or the clips holding the glass have broken completely.
• Crooked or Jammed Window: A window that tilts to one side as it moves up or down is a sign that the regulator is bent or a guide clip has broken. This can cause the glass to jam in the door frame.
• Slow or Erratic Movement: If the window moves much slower than it used to, or if it stops and starts, the motor could be failing or the regulator mechanism could be binding, causing resistance.
• Motor Runs But Window Doesn't Move: If you can hear the motor whirring when you press the switch, but the window stays put, the connection between the motor and the regulator (the gear) is likely stripped, or the cables are completely detached from the glass carrier.

Known Issues for Ford Contour & Mercury Mystique (1995-2000)

Window regulator failure is a very common problem for these vehicles. Forum discussions among owners frequently mention replacing regulators, often more than once. The primary cause of failure is the materials used in the original design; the plastic components become brittle over time and the cables can fray and snap. While there are no specific safety recalls or Technical Service Bulletins (TSBs) from Ford for this common failure, it is a well-documented wear-and-tear item for the Contour and Mystique platform.

Buying a Used Rear Window Regulator: What to Check

Since new OEM regulators are often discontinued and expensive, a quality used OEM part is a smart choice. Aftermarket parts can be cheaper, but often use lower-quality plastics that may not last as long as a factory original. Here’s what to inspect on a used unit:

Physical Inspection

• Check the Cables: Look at the cables where they enter and exit the motor housing. Ensure they are not frayed, kinked, or tangled. A tangled cable is the number one cause of failure.
• Inspect Plastic Parts: Carefully examine all plastic pieces, especially the clips that attach to the window glass and the pulleys the cable rides on. Look for cracks, stress marks (white discoloration), or any signs of breakage.
• Test the Motor (If Possible): If the motor is included, try to connect it to a 12V power source to confirm it operates smoothly in both directions.
• Look for Rust: Minor surface rust on the metal rails is usually okay, but avoid any parts with heavy, flaking rust that could compromise structural integrity.

Replacement Overview

Replacing the window regulator is a straightforward job that a DIY mechanic can typically complete in 1-2 hours with basic tools.

Tools Needed:

• Socket set (8mm is common for these Fords)
• Screwdrivers (Phillips and flathead)
• Trim removal tool (recommended to avoid scratching panels)
• Strong tape

Step-by-Step Summary:

1. Remove the Door Panel: This involves removing a few screws, often hidden behind small covers in the door pull and handle area, and then carefully prying the panel off.
2. Peel Back the Vapor Barrier: Carefully peel back the plastic sheet behind the door panel to gain access to the inside of the door. Try not to tear it.
3. Secure the Window: Roll the window all the way up and securely tape it to the top of the door frame.
4. Disconnect the Glass: Lower the old regulator (if possible) to align the bolts that hold the glass to the regulator with the access holes in the door. Remove the bolts.
5. Unbolt the Regulator Assembly: Remove the bolts holding the regulator track and motor to the door shell.
6. Remove the Assembly: Disconnect the motor's electrical plug and carefully maneuver the old regulator out through the largest opening in the door.
7. Install the New Regulator: Installation is the reverse of removal.

Cost Comparison

Prices can vary based on location and supplier, but this gives a general idea of what to expect.

Technical Specifications

This part is specific to the rear passenger side door on power window models.

Known OEM Part Numbers: F5RZ-5427000-A, F5RZ5423394A, F5RZ5427000A, F5RZ5427000B

Frequently Asked Questions (FAQ)