Are you worried your brakes aren’t performing like they used to? Changes in braking feel could indicate failing brake fluid, which is an essential part of your car’s safety system.
This guide will help you identify the signs of bad brake fluid and explain why it’s important to address them quickly.
We’ll cover the key warning signs, what contributes to brake fluid issues, and the importance of professional inspection.
What Are The Warning Signs Of Failing Brake Fluid?
Having reliable brakes is fundamental for safe driving.
Unfortunately, failing brake fluid can seriously reduce your car’s stopping power.
To ensure your safety and the safety of others on the road, it’s important to be aware of the signs of deteriorating brake fluid.
Here are the essential warning signs to watch out for:
- Spongy or Soft Brake Pedal: A healthy brake pedal should feel firm and provide a reassuring response with moderate pressure. If you press the brake and it feels soft or sinks spongily to the floorboard, it could be a sign of failing brake fluid (or air trapped within the brake lines). This is a serious safety concern. Do not attempt to drive your car further. Contact a qualified mechanic immediately for a thorough brake inspection.
For visual Info on how to diagnose a spongy brake pedal, you can watch this helpful YouTube video:
- Increased Stopping Distance: If you notice a significant increase in the distance it takes to bring your car to a complete stop, even when applying moderate pressure to the brake pedal, it could indicate compromised braking performance due to bad brake fluid. This is another critical warning sign that shouldn’t be ignored. Drive with extreme caution and schedule a professional brake inspection as soon as possible.
- Unusual Noises During Braking: Grinding, squeaking, or other abnormal noises while braking can point to various brake problems, including issues with the fluid. While worn brake pads are a common reason for the noise, it’s important not to dismiss this sign. Consult a mechanic for a proper diagnosis and any necessary repairs.
Some warning signs might be little or develop gradually over time.
Here are some additional factors to consider:
- Age of Your Brake Fluid: Brake fluid is hygroscopic, it absorbs moisture from the air over time. This moisture can lead to a decrease in the boiling point of the fluid, which can cause brake fade during high-heat situations. Most car manufacturers recommend flushing the brake fluid every 2-3 years, or based on the vehicle’s service schedule.
- Leakage in the Brake System: A leak in the brake system can allow air or contaminants to enter, compromising the effectiveness of the fluid. If you notice any puddles or drips around your tires, or a significant drop in the brake fluid reservoir level, have your brakes inspected by a mechanic immediately.
- Visual Cues: Some vehicles have a translucent brake fluid reservoir, allowing for a quick visual inspection. If the fluid appears dark or cloudy instead of clear or light amber, it could indicate contamination and warrant a visit to a mechanic.
While this information equips you to be aware of potential brake fluid issues, these warning signs can also be caused by other brake system problems.
A professional mechanic has the expertise and tools to pinpoint the exact cause of the problem and ensure your brakes are functioning safely.
Don’t hesitate to seek professional help if you experience any of the warning signs mentioned above.
How To Identifying Contaminated Or Worn Brake Fluid?
While a professional mechanic can perform a comprehensive inspection of your brake fluid, there are some basic visual checks you can do yourself to identify potential problems.
However, visual inspection has limitations.
If you suspect contamination based on the following signs, it’s essential to consult a mechanic for a professional diagnosis and likely a brake fluid flush.
Here’s a guide to help you with a basic visual check:
Not all cars have a translucent brake fluid reservoir, so this method might not apply to all vehicles.
If your car does have a transparent reservoir, follow these steps:
- Locate the Brake Fluid Reservoir: Open the hood and identify the brake fluid reservoir. It’s typically a plastic container made of translucent material and labeled with “Brake Fluid” or similar markings. The reservoir will also have a minimum and maximum fill line indicator.
- Check the Fluid Level: The first step is to ensure the fluid level is within the designated range between the minimum and maximum fill lines on the reservoir. A low fluid level could indicate a leak in the brake system, which is a serious safety concern and requires immediate attention from a qualified mechanic.
- Inspect the Fluid Color: Fresh brake fluid is usually clear or light amber. If the fluid in your reservoir appears dark brown, cloudy or has a greenish tint, it could be a sign of contamination by moisture or debris. Contamination can compromise the effectiveness of the brake fluid, reducing its ability to withstand high temperatures without vaporizing (boiling). This can lead to decreased braking performance and a safety risk. A brake fluid flush might be necessary to restore optimal performance.
This visual check provides a basic overview of your brake fluid condition.
A mechanic can perform a more thorough inspection that includes testing the boiling point of the fluid.
Alternatives for Non-Translucent Reservoirs
If your car doesn’t have a translucent reservoir for visual inspection, consulting a mechanic for a complete brake fluid check is the best course of action.
The video below is also a great source to learn about how you can check your brake fluid for contamination:
The Dangers Of Ignoring Bad Brake Fluid
Your car’s brakes are arguably the most important safety system.
They allow you to slow down and stop safely, preventing accidents and keeping you and others on the road protected.
Brake fluid plays an essential role in this process, but neglecting bad brake fluid can lead to serious consequences.
Here’s why you shouldn’t ignore the warning signs:
- Reduced Braking Performance: One of the most significant dangers of bad brake fluid is its impact on braking effectiveness. Contaminated or worn brake fluid can’t transmit pressure from the brake pedal to the wheels as efficiently. This translates to a spongy brake pedal feel and a longer stopping distance, making it difficult to bring your car to a complete stop on time, especially during emergencies. Imagine, for example, not being able to stop in time for a red light when the light changes.
- Increased Stopping Distance: If you notice it takes considerably longer than usual to stop your car, even when applying moderate pressure to the brake pedal, it could be a sign of compromised braking performance due to bad brake fluid. This increased stopping distance can be extremely dangerous, especially on highways or when encountering unexpected obstacles.
- Brake System Damage: Beyond the immediate safety risks, bad brake fluid can also wreak havoc on your brake system over time. Moisture absorption by old brake fluid lowers its boiling point. When the brakes get hot during use, the fluid can boil and create vapor bubbles within the system. These vapor bubbles compress easily, unlike fluid, rendering your brakes ineffective This condition, known as brake fade, can significantly reduce braking power and lead to potential component damage within the brake system, resulting in costly repairs.
Fortunately, you can avoid these dangers by taking proactive measures:
- Improved Braking Performance: Regular brake fluid maintenance, including following the manufacturer’s recommended service intervals for flushes, ensures optimal braking performance. This translates to a firmer brake pedal feel, shorter stopping distances, and increased confidence on the road.
- Reduced Accident Risk: A well-maintained braking system significantly reduces the risk of accidents caused by brake failure. By addressing brake fluid issues promptly, you can ensure your car comes to a stop safely when needed, preventing potential collisions.
- Protect Your Investment: Maintaining your brakes not only safeguards your safety but also protects your wallet in the long run. Regular brake fluid flushes and overall brake system care can extend the lifespan of your brakes and save you money on potential repairs down the line.