Infiniti G35 Window Motor Guide (2003-2008): Symptoms, Problems, and Replacement
If your 2003-2008 Infiniti G35 window is slow, stuck, or acting erratically, the motor is a likely culprit.
- Window motor failure is a very common problem on 2003-2008 G35s due to worn internal brushes.
- In most cases, you only need to replace the motor, not the entire regulator assembly, which saves money.
- Aftermarket brands like Dorman offer a reliable, cost-effective alternative to expensive OEM parts.
- A window reset procedure is required after installation to restore auto-up/down functionality.
Is Your G35 Window Acting Up? It's Probably the Motor.
Window motor failure is a very common issue for the 2003-2008 Infiniti G35, for both coupe and sedan models. After more than a decade of use, the internal components, specifically the carbon brushes, wear out. This causes the motor to become weak, operate intermittently, or fail completely. The good news is that replacing the motor is a straightforward job that many owners can do themselves.
A Common Point of Failure
Owners report that window motors, especially on the driver's side, tend to fail from regular use. Heat can also make a weak motor perform even worse. If your window works sometimes but not others, or if it gets stuck after being in the sun, the motor is almost certainly the problem.
Symptoms of a Failing G35 Window Motor
A dying window motor will give you a few warning signs before it quits for good. Look out for:
- Slow Operation: The window moves up or down much slower than it used to.
- Getting Stuck: The window stops moving partway up or down. Sometimes, banging on the door panel can get it to move again, 🎬 Check out this video on how to fix motor issues for free. which points directly to a bad motor.
- Clicking Noise: You hear a click from inside the door when you press the switch, but the window doesn't move. This often means the motor is receiving power but is too weak to move the glass.
- Auto-Up/Down Issues: The auto-up feature might stop working correctly, or the window might go back down slightly after closing.
- Total Failure: The window doesn't move at all, and you hear no sound from the motor.
Choosing the Right Aftermarket Window Motor
You don't need to buy an expensive OEM motor from the dealership. Aftermarket motors from brands like Dorman, Cardone, and Replacement offer a cost-effective solution. For a car of this age, a new aftermarket part is often a smarter choice than a used or remanufactured OEM part, which may have significant wear already.
- Value Tier (Replacement): These are the most affordable options. They are a good choice if budget is your primary concern. Quality can be a mixed bag, but they often come with a warranty.
- Standard Tier (Dorman, Cardone): Brands like Dorman are widely available and are engineered to match the fit and performance of the original part. They often come with a limited lifetime warranty, which is a major benefit. Cardone offers both new and remanufactured options. While remanufactured parts can save money, some owners have had them fail prematurely. A new aftermarket unit is generally the more reliable choice.
- OEM Quality (Aisin): Aisin is an original equipment manufacturer for many brands. If you want the closest thing to factory quality without the dealership price, Aisin is an excellent choice.
Pro Tip: Replace the Motor, Not the Whole Assembly
In most G35 cases, only the motor needs to be replaced, not the entire window regulator (the metal track assembly). The motor is typically held to the regulator by three screws. Replacing just the motor is cheaper and easier. Only replace the regulator if the cables are frayed or the tracks are visibly bent or damaged, which is less common.
Cost of Replacing an Infiniti G35 Window Motor
| Part Type | Estimated Cost |
|---|---|
| New Aftermarket Motor | $59 - $140 |
| New OEM Motor | $250 - $400+ |
| Shop Labor | $120 - $250 |
*Prices are estimates and can vary based on location, brand, and vehicle model (coupe vs. sedan).
Frequently Asked Questions
Do I need to perform a window reset procedure after replacement?
Yes, this is a critical step. After installing the new motor and reconnecting the battery, the window's auto-up/down and the coupe's door-opening drop feature won't work correctly until you reset it. The procedure involves using a small reset button located on the door itself, which becomes accessible after you remove the door panel. You'll typically roll the window down, press and hold the reset button, roll the window all the way up manually, and then release the button. Many video guides online demonstrate this exact process for the G35.
🎬 See how to perform the window reset procedure correctly.Are there any recalls for the G35 window motor?
No. While there have been several recalls for the 2003-2008 Infiniti G35, none of them are for the window motors. The existing recalls cover issues like airbag sensors and wiring harnesses. Window motor failure is considered a standard wear-and-tear issue, not a safety recall item.
Should I replace the window regulator at the same time?
Generally, no. The window regulator is the metal assembly that the motor attaches to. On the G35, the motor is the component that almost always fails. The regulator itself is quite durable. Unless you see frayed cables, bent tracks, or hear grinding noises associated with the regulator cable, you likely only need to replace the motor itself. This saves you money and simplifies the repair.
Is this a difficult DIY job?
For someone with basic tools and a bit of patience, this is a very manageable DIY job. The process involves removing the door panel, unbolting a metal plate, and then unbolting the motor from the regulator. The most common tools needed are a 10mm socket and a Phillips screwdriver. The entire job can usually be completed in about two hours. 🎬 Watch this step-by-step guide to replacing your window motor. There are numerous video tutorials on YouTube that walk through the entire process for both the G35 coupe and sedan.
Helpful Videos
Technical Specifications
OEM Part Numbers: 80731-CD00A 80731-CD001 80731-CD000 82731-AL510 80731-JK00B 80731-JK00C 82731-CM31A
The window motor is typically a 12V DC motor attached to the window regulator assembly with three screws. It includes an internal gearing mechanism to provide torque for lifting the window. Aftermarket replacements are designed to be direct-fit, using the same mounting points and electrical connector as the original.
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The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.
- INFINITI G35:
- 🎬 Helpful Videos
- 🛍️ Shop This Part
- Is Your G35 Window Acting Up? It's Probably the Motor.
- A Common Point of Failure
- Symptoms of a Failing G35 Window Motor
- Choosing the Right Aftermarket Window Motor
- Pro Tip: Replace the Motor, Not the Whole Assembly
- Cost of Replacing an Infiniti G35 Window Motor
- Frequently Asked Questions
- 🎟️ Get 5% Off