1985-1998 Saab 9000 Rear Window Regulator: Diagnosis and Replacement Guide

Symptoms of a Failing Rear Window Regulator

When a window regulator in a Saab 9000 begins to fail, the signs are usually obvious. Because the regulator and motor work together, it can sometimes be hard to tell which part is the problem. Here are the most common symptoms to watch for:

• Grinding, Clicking, or Chattering Noises: Strange sounds from inside the door when you operate the window are a classic sign of a failing regulator. This often points to stripped gears on the motor, a frayed cable, or broken plastic guides within the mechanism.
• Slow or Jerky Window Movement: If the window struggles to go up or down, or moves in a jerky motion, the regulator's mechanism may be binding or the motor may be losing strength. Old, dried-out grease on the regulator's tracks can increase friction and cause this symptom.
• Window Drops Inside the Door: A sudden and complete failure where the window glass falls down into the door indicates a major mechanical break, such as a snapped cable or a broken lift plate.
• Window is Crooked or Misaligned: If the glass tilts forward or backward as it moves, it means one of the regulator's lift points has likely broken, causing the glass to come off its track.
• The Window Doesn't Move, But You Hear the Motor: If you can hear the motor whirring or clicking inside the door when you press the switch, but the window doesn't move, the motor is working but is no longer connected to the regulator mechanism. This usually means the teeth on the motor gear or the regulator gear are stripped.
• No Movement and No Sound: This could be a failed motor, but it's also important to check the fuse and the window switch itself before assuming the regulator or motor is the culprit.

Buying a Used Rear Door Window Regulator

Given the age of the Saab 9000, a used OEM regulator is often the most practical and cost-effective solution. New OEM parts are scarce, and while some aftermarket options exist, a good-condition used original part often provides the best fit and function. Here’s what to check before buying:

1. Verify Compatibility

• Side-Specific: Regulators are specific to the driver's side (left) and passenger's side (right). They are not interchangeable. The part for the rear driver's side is often designated as 'LH' (Left Hand).
• Part Numbers: If possible, match the part number. Verified OEM part numbers for the rear driver's side regulator assembly include 9255225 and 4241618.
• Motor Included?: The regulator (mechanical arms) and the motor are technically separate parts but are often sold as a single assembly. Clarify with the seller whether you are buying just the regulator, the motor, or the complete unit. If your motor still works, you can save money by buying just the regulator, but buying a complete, tested assembly is often easier.

2. Physical Inspection

When inspecting a used regulator, look for these common failure points:

• Plastic Guides and Rollers: Check all plastic components for cracks or breakage. These are the most common failure points on Saabs of this era.
• Cables: If it's a cable-style regulator, inspect the cables for any signs of fraying, kinking, or rust. Ensure they are seated correctly in all pulleys.
• Gear Teeth: Look at the main gear where the motor engages. Check for worn, chipped, or stripped teeth.
• Rust and Corrosion: Surface rust on the metal arms is usually okay, but avoid any parts with heavy, flaking rust that could compromise structural integrity.
• Electrical Connector: Ensure the motor's electrical connector and wiring are intact with no cut wires or corrosion on the pins.

Cost Comparison for Saab 9000 Rear Window Regulator

Repair costs can vary significantly based on the part source and who performs the labor.

Replacement Overview & Difficulty

Replacing the rear window regulator on a 1985-1998 Saab 9000 is a manageable DIY project for someone with basic tools and patience.

• Difficulty: 2 out of 5
• Estimated Time: 1.5 hours
• Tools Required: Torx bit set (T25), socket set (10mm), flathead screwdriver, plastic trim removal tools.

General Steps:

1. Remove the Door Panel: This involves removing two T25 Torx screws in the armrest/door pull area (they are hidden under plastic caps) and another screw behind the courtesy light. Then, carefully use a trim tool to pop the clips around the bottom and sides of the panel before lifting it up and off the door.
2. Peel Back the Moisture Barrier: Carefully peel back the plastic or foam sheet to get access to the inside of the door. Don't rip it, as you will need to re-seal it later.
3. Support the Window: If the window is not already at the bottom of the door, you may need to temporarily connect the switch to lower it until you can see the bolts that attach it to the regulator. Once the bolts are removed, slide the glass up by hand and secure it at the top of the door frame with strong tape or a suction cup.
4. Unbolt the Regulator: Disconnect the electrical connector from the motor. The regulator assembly is held to the door by several 10mm bolts. Remove these bolts.
5. Remove the Assembly: Carefully maneuver the old regulator assembly out through the largest access hole in the door frame.
6. Installation: Installation is the reverse of removal. Install the new regulator, re-bolt it to the door, attach the window glass to the new regulator, and test its operation before putting the moisture barrier and door panel back on.

Frequently Asked Questions (FAQ)