Porsche Part Number for 2001 996 Rear Quarter Window Regulator: A Complete Guide

If you own a 2001 Porsche 911 (996) and the rear quarter window won't move or makes grinding noises, you likely need a new window regulator. The rear quarter glass on the 996 coupe is small but crucial for cabin ventilation and aesthetics. Replacing it can be tricky because the correct part number must match your car's build. Misidentifying the regulator can lead to a frustrating fitment issue. This guide covers everything you need to know about the part number for the 2001 996 rear quarter window regulator, from OEM numbers to aftermarket options, so you can order the right part the first time.

Understanding the 2001 996 Rear Quarter Window System

The rear quarter windows on the 996 coupe are mounted in the fixed quarter panel behind the doors. They open outward via a single-arm regulator driven by an electric motor. Unlike the main side windows, quarter windows are not framed and seal directly against the body. The regulator assembly includes the motor, lift mechanism, and mounting bracket. Over time, the plastic gears in the motor wear out, cables snap, or the mechanism binds due to corrosion. Identifying the exact regulator is essential because Porsche used different versions depending on production date and optional equipment.

Common Symptoms of a Failing Rear Quarter Window Regulator

Before ordering a part, confirm the regulator is the issue. Typical signs:

• Window does not open or close when pressing the switch.
• Grinding, clicking, or whining noise during operation.
• Window moves slowly or erratically.
• Window falls out of alignment or won't seal when closed.
• Broken glass due to mechanical binding.

If you notice any of these, the regulator likely needs replacement. Also check the switch and wiring with a multimeter to rule out electrical faults.

Why the Correct Part Number Matters for Your 2001 996

The 996 production spanned 1998 to 2005 with revisions. The rear quarter window regulator changed part numbers at least twice. Using a wrong part can cause mounting holes not to align, motor connector mismatch, or incorrect stroke length. The 2001 model year sits in the middle of the 996.1 (1998–2001) generation, but some late 2001 cars may have 996.2 parts. Always verify your car's VIN and production date before ordering.

OEM Porsche Part Numbers for the 2001 996 Rear Quarter Window Regulator

Original Equipment Manufacturer (OEM) parts are made by Porsche or its suppliers. For the 2001 996, the left (driver side in US) and right (passenger side) regulators have different numbers. The commonly referenced part numbers are:

• Left side: 996 542 034 00 (superceded by 996 542 034 01 and later 996 542 034 02)
• Right side: 996 542 033 00 (superceded by 996 542 033 01 and later 996 542 033 02)

These numbers are for the complete regulator assembly including motor. Porsche has updated the design over the years, so the latest supercession is the recommended OEM part. You can buy from a Porsche dealership or online OEM parts suppliers. Expect to pay $200–$350 per side.

Aftermarket Alternatives for the 996 Rear Quarter Window Regulator

Several aftermarket brands produce regulators for the 996, often at lower prices. Common ones include:

• ACI (Auto Componentes Inc.)
• Dorman
• TYC
• URO Parts

Aftermarket regulators may have different part numbers. For example, Dorman 749-042 (left) and 749-043 (right). They are often cheaper ($80–$150) but may use less robust materials. Some users report shorter lifespan or noisier operation. If you want a budget-friendly option, check reviews on forums like Rennlist for real-world feedback. Avoid no-name brands with no warranty.

How to Verify the Correct Part Number for Your Specific 2001 996

To ensure you get the right regulator:

1. Check your VIN: Your VIN (Vehicle Identification Number) tells the exact build. The 10th digit for 2001 is 1. But more important is the production date. Look at the sticker on the driver door jamb for month and year of manufacture.
2. Inspect the existing regulator: Remove the interior quarter panel trim (you'll need a Torx T20 and trim removal tools). The part number is often stamped on the regulator frame. Write it down.
3. Cross-reference with Porsche parts catalog: Enter your VIN into an online Porsche parts catalog (like Pelican Parts or ECSTuning) to see the correct OEM number.
4. Contact a Porsche parts specialist: Call a dealership or independent shop that works on Porsches. Give them your VIN and they can confirm the exact part number.

Installation Overview for the 2001 996 Rear Quarter Window Regulator

Replacing the regulator is a DIY job if you have moderate mechanical experience. Here's a high-level summary:

• Remove the quarter window trim panel (carefully prying clips).
• Disconnect the battery to avoid accidental window movement.
• Disconnect the electrical connector from the regulator motor.
• Remove the two or three bolts securing the regulator to the body.
• Carefully extract the regulator through the opening.
• Install the new regulator: position it, bolt it in, connect the motor, and test operation before reinstalling trim.
• Adjust the window height and tilt if needed using the adjustment slots on the regulator.

Torque specs: bolts are typically 8 Nm (6 ft-lb). Be careful not to overtighten. If you're not confident, hire a Porsche mechanic. Labor is usually 1–2 hours per side at a shop.

Final Recommendation

For most owners, buying the latest OEM-superceded part (left: 996 542 034 02, right: 996 542 033 02) is the safest choice. It guarantees exact fit and durability. If budget is tight, a reputable aftermarket brand like ACI can work, but check forum reviews for your specific year. Always verify with your VIN and existing part number before ordering. Whether you DIY or have a shop install it, using the correct part number saves time and ensures your 996's rear quarter window operates smoothly for years.