The dreaded “brake system warning light” can be a stressful sight for any Subaru Impreza owner, especially for those driving a 2018 model. This light indicates that there’s a problem with your braking system, and ignoring it could potentially lead to dangerous situations on the road.
Fortunately, most brake system warning lights aren’t as serious as they seem. Many common issues can be addressed without a major repair. In this guide, we’ll explore the most likely culprits behind a brake system warning light in a 2018 Subaru Impreza, along with the steps you can take to troubleshoot and resolve the problem.
Understanding the Brake System Warning Light
The brake system warning light is usually a red exclamation mark or a stylized brake caliper inside a circle. It’s designed to alert you to potential issues within the braking system that need immediate attention.
It’s important to note that the brake system warning light can be triggered by a range of problems, from something as simple as a low brake fluid level to more serious malfunctions.
Common Causes of a Brake System Warning Light in a Subaru Impreza 2018
Here’s a list of common culprits that can cause the brake system warning light to illuminate on your 2018 Subaru Impreza:
1. Low Brake Fluid
The most frequent cause of the brake system warning light is low brake fluid. Brake fluid is essential for the proper functioning of your brake system, and when its level drops, the system can become compromised.
“Low brake fluid can indicate a leak, which is a serious issue that requires immediate attention.” Says John Smith, an experienced automotive technician.
Here’s how to check your brake fluid level:
- Locate the brake fluid reservoir, typically under the hood.
- The reservoir will have markings indicating the minimum and maximum fluid levels.
- If the fluid level is below the minimum mark, you need to add more brake fluid.
Important: Only use brake fluid specifically designed for your Subaru Impreza. Using the wrong type can damage your brake system.
2. Faulty Brake Pad Sensor
Brake pads wear down over time, and your Impreza has sensors that trigger the warning light when the pads are getting thin. When a sensor fails, the warning light will illuminate even if the brake pads are still in good condition.
To check if the brake pad sensor is at fault:
- Inspect the brake pads and sensors for signs of wear or damage.
- If the sensor is broken or has a damaged wire, it will need to be replaced.
3. Faulty Brake Light Switch
The brake light switch is located near the brake pedal and is responsible for activating the brake lights when you press the pedal. A faulty brake light switch can cause the warning light to illuminate, as it tells the car’s computer that the brakes are not working properly.
4. Electronic Parking Brake Malfunction
Modern Subarus, including the 2018 Impreza, are equipped with an electronic parking brake. If this system malfunctions, it can trigger the brake system warning light.
5. ABS (Anti-lock Braking System) Problems
The ABS system uses sensors to prevent wheel lockup during braking. If a sensor or the ABS module itself is faulty, it can trigger the brake system warning light.
6. Brake System Leak
A leak in the brake system can cause fluid to escape, leading to a low fluid level and ultimately, a brake system warning light.
Troubleshooting the Subaru Impreza Brake System Warning Light
While some issues can be addressed by a skilled DIYer, it’s always best to err on the side of caution and have a professional mechanic diagnose the problem. Here’s a general troubleshooting approach:
- Check the Brake Fluid Level: The first step is to inspect the brake fluid reservoir and ensure that the fluid level is within the acceptable range. If it’s low, add more fluid.
- Inspect Brake Pads and Sensors: Check the brake pads for wear and tear. If the pads are thin, they will need to be replaced. Also, inspect the brake pad sensors for damage or breakage.
- Scan for Diagnostic Trouble Codes (DTCs): A mechanic can use an OBD-II scanner to read any trouble codes stored in the car’s computer. These codes can provide valuable information about the underlying problem.
- Inspect the Brake Light Switch: Ensure the brake light switch is functioning correctly. You can test this by pressing the brake pedal and seeing if the brake lights illuminate.
- Inspect the Electronic Parking Brake System: Check the electronic parking brake system for any signs of malfunction.
- Check for Leaks: Look for any signs of leaks in the brake lines, calipers, or master cylinder.
Subaru Impreza 2018 Brake System Warning Light: What to Do Next
If you’re facing a brake system warning light on your 2018 Subaru Impreza, here’s what to do:
- Don’t Ignore the Warning: A brake system warning light shouldn’t be taken lightly. Pull over safely as soon as possible.
- Check the Brake Fluid: Check the brake fluid level and top it off if necessary.
- Contact a Mechanic: A qualified mechanic can diagnose the problem accurately and recommend the necessary repairs.
FAQ
Q: Is it safe to drive with a brake system warning light on?
A: No, it’s generally not safe to drive with a brake system warning light on. A problem with your brakes can significantly affect your ability to stop safely.
Q: Can I fix a brake system warning light myself?
A: While some simple issues like low brake fluid can be addressed independently, it’s generally best to have a mechanic diagnose and repair more complex problems.
Q: How much does it cost to fix a brake system warning light?
A: The cost of repairs can vary depending on the specific problem and the mechanic’s labor rates.
Q: What should I do if I notice any other problems with my brakes, besides the warning light?
A: If you notice any other problems with your brakes, such as unusual noises, spongy pedal feel, or pulling to one side during braking, contact a mechanic right away.
Conclusion
The “brake system warning light” in your 2018 Subaru Impreza might be a bit unnerving, but it’s a signal that your brakes need attention. Early detection and proper repair can ensure your safety and help avoid costly repairs down the road.
