2018 Subaru WRX STI Window Won't Go Up Or Down

Common Causes of Window Malfunctions in Your 2018 Subaru WRX STI and How to Fix Them

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Reviewed by
Devin Cabugcal
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 Subaru WRX STI 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 Subaru WRX STI 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.

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 steps should I take to diagnose why the window on my 2018 Subaru WRX STI won't go up or down?

When diagnosing why the window on your 2018 Subaru WRX STI won't go up or down, it's essential to adopt a systematic approach that starts with the simplest solutions before delving into more complex issues. Begin by checking the window switch, as a faulty switch can easily prevent window operation. If the switch appears functional, proceed to inspect the window motor to ensure it is receiving power and operating correctly; a malfunctioning motor is a common culprit. Next, examine the window regulator, which is crucial for the window's movement, looking for any signs of damage or wear. Don't overlook potential electrical issues; check the fuses and wiring associated with the window system, as a blown fuse or damaged wiring can disrupt functionality. Finally, inspect the window tracks for obstructions or debris that may hinder movement, and ensure they are clean and lubricated for optimal performance. By following this diagnostic approach, you can effectively identify and resolve the issue with your window.

What are the common problems that could cause the window of a 2018 Subaru WRX STI to not go up or down?

When dealing with window issues in a 2018 Subaru WRX STI, it's essential to understand the common problems that may be at play. One of the primary culprits is a faulty window regulator, which is crucial for the smooth operation of the window. If the window is not moving as it should, the regulator might need replacement. Additionally, the power window motor plays a vital role in this system; if it is damaged or malfunctioning, it can halt window movement entirely. Electrical problems, such as blown fuses or faulty wiring, can also disrupt the window's functionality, making it important to check these components for any signs of damage. Another potential issue is a malfunctioning window switch, which may fail to send the correct signals to the motor, preventing the window from responding. Lastly, if the window has come off its track, it can lead to sticking or erratic movement, often due to wear and tear or physical damage. By systematically checking these areas, DIYers can effectively troubleshoot and resolve window issues in their Subaru WRX STI.

How urgent is it to address the malfunctioning window in my 2018 Subaru WRX STI?

Addressing a malfunctioning window in your 2018 Subaru WRX STI is crucial for several reasons. First and foremost, safety is a primary concern; a window that is stuck open or closed can obstruct your visibility while driving, increasing the risk of accidents. Additionally, a malfunctioning window compromises the security of your vehicle, making it an easy target for theft or break-ins. Promptly fixing the issue not only prevents further damage to the window mechanism but also avoids more costly repairs down the line. Moreover, a functioning window is essential for maintaining comfort within the vehicle, especially during extreme weather conditions, as it allows for proper temperature regulation. Therefore, it is advisable to address any window malfunctions as soon as they arise to ensure the safety, security, and overall functionality of your Subaru WRX STI.

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