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How do I know if my brake fluid is low?


Brake fluid is a critical component of your vehicle's braking system, ensuring that your brakes function properly and safely. If your brake fluid is low, it can compromise your ability to stop effectively, putting you and others on the road at risk. In this article, we’ll explore the signs of low brake fluid, why it happens, and what you should do about it.


Signs That Your Brake Fluid Might Be Low


Recognizing the symptoms of low brake fluid can help you address the issue before it becomes a serious safety concern. Here are some common signs to watch for:



  • Brake Warning Light: Most modern vehicles have a dashboard warning light that illuminates when there’s an issue with the braking system, including low brake fluid.

  • Soft or Spongy Brake Pedal: If your brake pedal feels soft or spongy when you press it, this could indicate low brake fluid or air in the brake lines.

  • Increased Stopping Distance: If your car takes longer to stop than usual, it might be due to insufficient brake fluid.

  • Visible Fluid Leaks: Check under your car for any puddles or wet spots near the wheels or under the engine bay. Brake fluid is typically clear to yellowish and has a slightly oily texture.


Why Does Brake Fluid Get Low?


Brake fluid levels can drop for several reasons, and understanding these causes can help you prevent future issues:



  • Normal Wear and Tear: As your brake pads wear down, the brake calipers extend further, which can cause a slight drop in brake fluid levels.

  • Leaks in the Brake System: A leak in the brake lines, calipers, or master cylinder can lead to a significant loss of brake fluid.

  • Evaporation or Contamination: Over time, brake fluid can absorb moisture from the air, reducing its effectiveness and potentially lowering its level.


What Should You Do If Your Brake Fluid Is Low?


If you suspect that your brake fluid is low, follow these steps to address the issue:



  • Check the Brake Fluid Reservoir: Locate the brake fluid reservoir under the hood of your car. It’s usually a small, translucent container labeled “Brake Fluid.” Check the fluid level against the “MIN” and “MAX” markings.

  • Top Off the Fluid: If the fluid is below the “MIN” line, add the appropriate type of brake fluid as specified in your vehicle’s owner’s manual. Be careful not to overfill.

  • Inspect for Leaks: If the fluid level drops again quickly, there may be a leak in the system. Look for visible signs of leakage and consult a professional mechanic immediately.

  • Schedule a Brake Inspection: Even if you top off the fluid, it’s essential to have your brakes inspected by a trusted auto repair shop to ensure there are no underlying issues.


Why Regular Brake Maintenance Matters


Brake fluid plays a vital role in your vehicle’s safety, and maintaining proper levels is just one part of overall brake system care. Regular brake inspections and maintenance can help you avoid costly repairs and ensure your vehicle stops safely every time.


At Kevin’s Autos, we specialize in brake system diagnostics and repairs. If you’re experiencing any of the symptoms mentioned above or have concerns about your brake fluid, don’t hesitate to contact us. Your safety is our top priority!


Frequently Asked Questions

What happens when your brake fluid is low?


Soft, Bouncy, or Spongy Brake Pedal
This is a sign you need a brake fluid change. Low brake fluid will cause air to fill the gaps in your brake line—leading to soft brakes. Spongy brake pedals can be both terrifying and dangerous—especially if you do not get them serviced at the first sign of an issue.



How do you know if your car is out of brake fluid?


If you are low on your brake fluid, you may notice one or more of the following signs: Brake warning light illuminated on your dash. Brake fluid appears low, discolored, or dirty. Brake pedal feels spongy or mushy.



Is it okay to add new brake fluid to old brake fluid?


Yes, you can. You can add brake fluid without removing the old fluid from your reservoir. If your brake system is not exposed to air, then it's okay. Bleeding is unavoidable only when the brake fluid traps moisture from the air.



How do I know if I just need brake fluid?


Here are six signs that your brake fluid needs topping up or changing:

  • Brake Pedal not responsive.
  • Brake Pads Vibrating.
  • Noisy Brakes.
  • ABS Warning Light.
  • Brake Fluid discolouration.
  • Vehicle pulling to the side, left or right.



Can I just add brake fluid if it's low?


If your brake fluid is at or above the “MIN” line, your brake fluid level is fine and you don't need to add any. If your fluid is below the “MIN” line, carefully pry the reservoir cap off, and then add brake fluid until the level is just under the “MAX” line.



Can I just refill brake fluid?


If your brake fluid is low or needs replacing, you can either have it replaced by a professional or replace it yourself by following our four simple steps: Open the reservoir cap. Slowly add the brake fluid to the reservoir, using a funnel until it meets the maximum marker.



How would a driver know if the brake fluid is low?


Difficulty pressing the brake pedal or it feels too soft: This could suggest low brake fluid levels. However, contaminated fluid or air in the system might also be the cause. Fluid pools near one or more wheels: If you spot fluid puddles near one or more of your wheels, it's a strong indication of a brake fluid leak.



Can I just add brake fluid without flushing?


Yes, you can. You can add brake fluid without removing the old fluid from your reservoir. If your brake system is not exposed to air, then it's okay.



Does a warning light come on for low brake fluid?


The most likely cause of the brake warning light is that the brake fluid level has got a little low. You should stop when it's safe to do so, consult your owner's manual to locate the brake fluid reservoir and top it up with the correct brake fluid. This should result in the brake warning light going out.



Can I just add brake fluid without bleeding?


Can you top up brake fluid without bleeding? Yes, you can do that but the main focus has to be on not adding too much brake fluid. You need a lot of attention to pull this through, but it will offer you the type of results and benefits that you need.


Kevin's Auto

Kevin Bennett

Company Owner

Kevin Bennet is the founder and owner of Kevin's Autos, a leading automotive service provider in Australia. With a deep commitment to customer satisfaction and years of industry expertise, Kevin uses his blog to answer the most common questions posed by his customers. From maintenance tips to troubleshooting advice, Kevin's articles are designed to empower drivers with the knowledge they need to keep their vehicles running smoothly and safely.