2018 Audi S8 Window Won't Go Up Or Down

Common Causes of Window Malfunctions in Your 2018 Audi S8 and How to Fix Them

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Reviewed by
Andrew Hajjar
Written by RepairPal Car Genius
Updated January 14, 2025
0%
36% chance it's the
Fuse, Relay or Electrical System
0%
20% chance it's the
Window Motor
0%
24% chance it's the
Window Regulator
0%
20% chance it's
Something else
The most common reasons a 2018 Audi S8 window won't go up or down are window's electrical system such as a fuse or relay, a broken window motor, or a broken window regulator.
  • Fuse, Relay or Electrical System: A blown fuse or a faulty relay can disrupt the electrical circuit, causing components to fail or operate intermittently.
  • Window Motor: A faulty window motor or a broken window regulator can prevent the window from moving up or down properly.
  • Window Regulator: A faulty window regulator can cause the window to become stuck or operate erratically due to worn gears or a broken cable.
Proper diagnosis will determine the exact cause of your symptom, saving you money on unnecessary repairs. The diagnostic experts at RepairPal Certified shops have the right tools and experience to solve any symptom.

How much does it cost to fix a 2018 Audi S8 window won't go up or down?

Common Repairs

The total repair cost will vary based on the condition of your vehicle and the number of repairs needed to fix your symptom. Proper diagnosis will save you money by finding the exact repairs needed to fix your car right the first time.

If the door window motor fails, the window may not open or close, or it may operate intermittently. Traditionally, problems with power windows were caused by faulty switches or electrical wiring - especially the wires running between the door and the vehicle body that are subjected to repeated flexing. In these cases, the window might operate intermittently when the door is opened and closed. While this may still be the case on newer cars, it is increasingly common to find window motor problems that originate with a control module. Still, the switches and wiring should be checked thoroughly before replacing a window motor.

If one of the windows in a vehicle will not open or close properly, a failing door window regulator might be the cause. A window that is moving intermittently, or one that gets stuck on the way up or down, could also indicate a broken regulator. Other symptoms might include a clicking, chattering, or grinding noise when the window moves. In some cases a severely damaged window regulator could cause the window to drop inside the door.

When a switch can not make contact and close the circuit, the window cannot be raised and lowered. If the switch on the driver's door will not raise or lower the window in question, but the switch on the corresponding door works just fine, this is a good indication that there is a switch failure. This works the other way around, as well. If the switch on the door does not cause the window to function, but the driver's switch does, that is an indication of a passenger door window switch failure.

Due to the nature of electrical systems on modern vehicles, the range of problems these can cause are nearly limitless. However, there is a way to categorize them in two ways. Permanent and intermittent problems. Permanent problems appear and remain. This may be the vehicle will not start, the radio does not work, or the door chime will not turn off among many, many others. These problems are more straight-forward to diagnose since they present themselves at all time. This means there will always be a fault to find. Intermittent electrical problems, however, can be difficult or impossible to locate, since they appear then disappear without warning. The best case scenario for an intermittent issue is when replicating the problem is easily accomplished and understood. This allows a technician to make an issue semi-permanent, allowing them to find the fault. Other issues that come and go without warning and cannot be replicated on demand must occur when the technician is servicing the vehicle, otherwise there is no problem to correct. It is most important to understand that electrical system faults always require inspection, and can include the vehicle working in any manner, or not working at all.

Like we noted in the last section, general diagnosis symptoms are the most vague of the bunch. There are several diagnostic spectrums, electrical diagnosis, drivability diagnostics, engine diagnostics, transmission diagnostics, and the list could continue for about 5 or 10 more spectrums of diagnostics. The most important take-away here, is that general diagnostics are diagnostics that have no other spectrum in which they fit, or the problem is unknown. This means that any vehicle left outside of a repair facility with the keys and an authorization to perform diagnosis will be diagnosed under the general diagnosis spectrum.

What are the steps to diagnose a non-functioning window in a 2018 Audi S8?

When diagnosing a non-functioning window in a 2018 Audi S8, it's essential to adopt a systematic approach that begins with the simplest potential issues before moving on to more complex diagnostics. Start by checking the window switch, as a malfunctioning switch can often be the root cause of the problem. If the switch appears to be working, proceed to inspect the fuse box for any blown fuses related to the window system, as this is a common and easily fixable issue. Next, test the window motor to ensure it is receiving power and functioning correctly; a faulty motor can prevent the window from operating. If the motor is operational, examine the window regulator for any signs of damage or wear, as this mechanism is crucial for the window's movement. Additionally, inspect the wiring connected to both the motor and regulator for any loose connections or frayed wires that could disrupt functionality. If these steps do not resolve the issue, it may be necessary to consult a professional mechanic or an authorized Audi service center for a comprehensive diagnosis and repair. By following this structured diagnostic approach, you can effectively identify and address the cause of the window malfunction.

What are the common problems that could cause the window of a 2018 Audi S8 to stop going up or down?

When dealing with a window that won't move in a 2018 Audi S8, it's essential to understand the common problems that could be at play. One of the primary culprits is a faulty window regulator, which is responsible for the mechanical movement of the window. Over time, this component can wear out, leading to issues with the window's operation. Another potential issue is the window motor itself; if this motor fails, it won't provide the necessary power to lift or lower the window. Additionally, electrical problems such as a blown fuse or a malfunctioning switch can disrupt the window's functionality, making it crucial to check these components first. Misalignment of the window can also cause it to get stuck, often due to issues with the window track or seals that may require adjustment. Lastly, the window control module, which manages the window's operation, could be faulty, affecting communication between the switch and the motor. By systematically addressing these common problems, you can effectively troubleshoot and resolve the window issues in your Audi S8.

How urgent is it to address the malfunctioning window in a 2018 Audi S8?

Addressing a malfunctioning window in your 2018 Audi S8 is crucial for maintaining both safety and security. A window that fails to close properly can leave your vehicle exposed to theft and vandalism, making it a prime target for opportunistic criminals. Additionally, if the window is stuck open during inclement weather, you risk significant water damage to the interior, which can lead to costly repairs and electrical issues. Furthermore, a partially open window can disrupt the vehicle's aerodynamics, resulting in increased noise and discomfort while driving. By tackling the problem promptly, you not only safeguard your vehicle but also prevent the issue from escalating into more severe and expensive repairs. Therefore, it is essential to prioritize fixing a malfunctioning window to ensure the overall safety, security, and comfort of your Audi S8.

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