A brake fluid flush is a procedure that removes old fluid from your brake system and replaces it with fresh brake fluid. Show
But when do you need one? And how beneficial is it? In this article, we’ll cover what a brake fluid flush is, how often you’ll need it, and how much it will cost. We’ll also highlight the most convenient way to get a brake flush done. This Article Contains:(Click on links to jump to specific sections)
Let’s jump right in. What Is A Brake Fluid Flush?A brake fluid flush involves draining out contaminated or old fluid from your brake system and replacing it with clean and fresh brake fluid. Flushing helps maintain the health and effectiveness of your vehicle’s brakes. But what does brake fluid do? Brake fluid amplifies and transmits the force you apply when you press down on the brake pedal. When you engage the brake pedal, that force activates the brake master cylinder. In turn, the brake master cylinder forces the brake fluid along the brake line to reach the brakes at each wheel. If your car uses a disc brake system, a plunger inside the master cylinder pushes pressurized fluid into the brake caliper pistons. These hydraulic pistons then squeeze brake pads against the wheel rotor to create friction. And this frictional force helps stop the car. On the other hand, in a drum brakes assembly, pressurized brake fluid acts on the wheel cylinder that pushes a set of brake shoes against drums to stop your wheels. Irrespective of whether you use drum brakes or disc brakes, there are two kinds of brake fluid flushes:
Now that you understand what a brake fluid flush is, let’s go over why it’s so critical for brake performance: Why A Brake Fluid Flush Is NecessaryYour brake system comprises several working parts. Many of these parts are linked together using brake lines and hoses, which use brake fluid to transmit and amplify forces. That’s why it’s essential to ensure that the brake fluid retains its quality and doesn’t hamper the functioning of your other brake parts. And this is where a brake fluid flush comes in. It helps you: 1. Maintain The Quality Of The Brake FluidAs brake fluid ages with repeated use, chances are that it will get contaminated with material from different parts of the brake system, like:
When this happens, it can limit the pressure transmitting capacity of this hydraulic fluid and reduce your stopping power. Ultimately, as the contamination gets excessive, your hydraulic brake system could go out of service. Moreover, the additive package in your brake fluid gets depleted over time. What’s that? The additive package combines corrosion inhibitors, anti-rust compounds, and pH balancers into the brake fluid stored inside your master cylinder. This prevents the fluid from corroding your car’s parts. Once the additive package level drops, corrosion can build up in the internal brake system and compromise brake functioning. Carrying out a brake fluid flush replaces the bad brake fluid in the master cylinder reservoir with fresh brake fluid to restore additive package levels, remove contaminants, and ultimately improve brake performance. 2. Prevent Moisture Build UpBrake fluids are hygroscopic, meaning they tend to absorb moisture. As the brake fluid comes in contact with several brake system components, moisture content can be detrimental to their functioning. Why? The moisture absorbed by the brake fluid can lead to corrosion of several brake parts (for example, the brake calipers, brake rotors, etc.) since many of them are made of metal. And this corrosion can disrupt the functioning of your braking system. Performing a brake fluid flush eliminates the moisture-laden fluid by using fresh brake fluid in its place to prevent corrosion and ensure the optimal health of other brake components. This is especially important when it comes to the ABS and other traction control components. The ABS (Anti-lock Braking System) and traction control components are hyper-sensitive to moisture. If these components are exposed to contaminants from the old brake fluid for long periods, they could get damaged and lead to costly repairs. Flushing the brake system regularly to add clean brake fluid can protect these crucial components from degradation by keeping moisture and debris at bay. It’s clear that brake fluid flushes are very helpful, but how do you know when your vehicle needs a brake fluid flush service? 4 Symptoms That Indicate That You Need A Brake Fluid FlushHere are some signs that indicate that you might need a brake fluid change: 1. Leaky Brake FluidIf you notice a brake fluid leak, you could require an immediate brake fluid flush. A brake fluid leak reduces the braking force that can be transmitted through the brake line. To confirm your brake fluid level, you can take a look at the brake fluid reservoir located in your engine bay. Typically, you will find the brake fluid reservoir near the engine compartment. You can refer to your car owner’s manual to find the exact location. However, if you don’t feel confident about confirming a brake fluid leak on your own, you can reach out to an expert mechanic for help. They can come to your driveway, evaluate the brake fluid level, and carry out a brake fluid flush if needed. 2. Contaminated Brake FluidClean brake fluid looks somewhat golden, light brown, amber, or clear. If you find that the brake fluid is much darker or dirtier, you might need a brake fluid flush soon enough. This can happen due to excessive brake fluid aging or contamination from rubber, rust, or other debris that gets clogged in the brake line. If this is the case, take your car to an auto repair shop or have a qualified mechanic come over to perform a quick brake fluid flush service and get your brake system back in perfect condition. 3. Brake Pedal Feels SoftAt times, when you’re applying brakes, you might feel that your brake pedal is spongy. If brake fluid absorbs too much moisture, air pockets containing water vapor are created when these fluids get exposed to high temperatures. And these air pockets reduce the effectiveness of your vehicle’s brakes and lead to a soft feeling brake pedal. When this happens, your brakes won’t respond the way you want them to and can turn into a significant safety hazard. If you notice a spongy pedal, request a brake system inspection immediately. An experienced mechanic can then flush your vehicle’s brake fluid to remove any moisture present in the brake lines and add moisture-free, fresh fluid. 4. The ABS Light Turns OnIn some cars, the ABS warning light on the dashboard gets activated when you need a brake flush. This doesn’t mean the ABS light turns on only if you have bad brake fluid or a low brake fluid level. An illuminated ABS light can also result from:
To be safe, when the ABS light turns ON, consider getting your vehicle inspected by a professional mechanic to diagnose and fix the underlying issues. How Often Do You Need A Brake Fluid Flush?There’s no hard and fast rule as to how often you’ll need fluid flushes. Generally, most professional mechanics would recommend that you perform a brake fluid exchange every 30,000 miles or 2 years. This should help you overcome most of the after-effects of aging and bad brake fluid. You can also check your vehicle owner’s manual for a more specific estimate on how often you’d need a brake flush. However, your timeline for flushing the vehicle’s brake fluid can get accelerated if you’re someone who regularly uses the vehicle’s brakes aggressively, such as in stop-and-go traffic. How Much Does A Brake Fluid Flush Cost?The costs of performing a brake fluid flush can range between $90 and $200. It usually depends on your choice of new brake fluid and the auto repair labor costs in your area. Moreover, it can also depend on the year, model, engine, and make of your vehicle. For an accurate estimate of the brake fluid change cost for your vehicle, just fill this online form. What Happens During A Brake Fluid Flush?For best results, it’s recommended that you take your vehicle to an auto repair shop or request a mobile mechanic to come over to your location for brake service. During a brake fluid flush, your mechanic would: 1. Locate the brake fluid reservoir. 2. Drain out the contaminated and old fluid. 3. Clean out any debris left in the braking system. 4. Check whether any other brake components like the brake calipers, brake pads, or brake rotors will need to be replaced. 5. Carry out brake fluid replacement with high-quality, fresh fluid. 6. Remove any air trapped in the brake lines using a bleeder. 7. Verify that the brake system is working correctly. Luckily, there’s an easy way to find a certified mechanic to perform such a brake fluid replacement: The Easiest Way To Flush Your Brake FluidThe most convenient way to flush your vehicle’s brake fluid is to have a mobile mechanic visit you and do the brake service right then and there. And for mobile auto repair services, RepairSmith is your best bet! RepairSmith is a mobile vehicle repair and maintenance solution that offers these benefits:
Final ThoughtsA brake fluid flush helps you replace aged or contaminated brake fluid to maintain brake performance and prevent corrosion from creeping in. Fortunately, carrying out a brake fluid flush for your vehicle is super-convenient with RepairSmith. Just book your repair service online, and an ASE-certified mobile mechanic will come to you, ready to perform a proper brake fluid flush service. Is a brake fluid flush necessary?Corrosion and rust can cause structural damage to your braking system, leading to costly repairs. Regular brake fluid service can prevent these deeper system issues from occurring. Brake fluid flushes are recommended every 30,000 miles or 2 years, depending on your driving and braking patterns.
What happens if you dont flush brake fluid?Moisture-laden brake fluid can also cause metal components to rust and corrode, resulting in rust particles finding themselves in your brake fluid. When you don't change your brake fluid, your car's braking capabilities suffer greatly for it, leading to poor braking performance.
How much does it cost to flush brake fluid?The costs of changing the brake fluid, or doing a brake fluid flush, should cost between $80 to $130 and should be done by a professional mechanic to ensure safety. These costs can vary based on whether you want to change the fluid yourself and the type of fluid you have.
How long is brake fluid Good For?Brake fluid absorbs moisture, which reduces its performance. For that reason, it's best practice to change brake fluid every two years. However, brake fluid is one of the maintenance items that drivers miss most often. People rarely change their brake fluid before it goes bad.
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How often do you need to flush brake fluid
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