Do You Need To Change Your Brake Fluid When You Replace Your Brakes?

Do you need to change your brake fluid when you replace your brakes? If so, what type of brake fluid should be used?


The most common types of brake fluids are DOT 4 and DOT 5.

DOT stands for “Department of Transportation,” referring to the American Society of Testing Materials (ASTM) standards that specify brake fluids’ chemical composition and performance requirements.

The DOT numbers indicate the maximum allowable operating temperature for the fluid. DOT 4 is designed for use at temperatures up to 180°F (82°C), while DOT 5 is designed for use at higher temperatures.

DOT 4 and DOT 5 are both compatible with all modern vehicles. However, there are some differences between them:

DOT 4 is the most common type of fluid, which most cars come with from the factory. DOT 5, on the other hand, is a newer type of fluid that offers better performance.

DOT 4 is made from glycol, while DOT 5 is made from silicone. This means that DOT 5 is less likely to absorb water and has a higher boiling point. As a result, it’s the preferred choice for high-performance cars.

However, it’s also more expensive than DOT 4, so if you’re not planning on doing any serious racing, you might as well stick with the cheaper option.

What are the benefits of changing your brake fluid?

Regarding car maintenance, a few things are as important as changing your brake fluid. Not only does this help to keep your brakes in good working order, but it also helps to extend the life of your brake pads. And, of course, it’s always nice to know you’ll be able to stop when needed.

But what are the other benefits of changing your brake fluid? For one thing, it can help to improve your gas mileage.

That’s because old, dirty brake fluid is denser than new fluid, so your brakes must work harder to stop your car. The harder your brakes work, the more fuel your car uses.

So by changing your fluid, you can save money at the pump. Now that’s a benefit we can all get behind.

How often should you change your brake fluid?

It depends on several factors, including the make and model of your car, the condition of your tires, and whether or not you drive frequently. Most experts recommend checking your brake fluid every two years.

If you do not have access to a mechanic, you may want to check your brake fluid more frequently than this recommendation suggests. Click here for full details about how often to change brake fluid (Full Guideline).

What are the signs that you need to change your brake fluid?

If you notice any of these warning signs, it could mean that your brake fluid needs to be changed:

Your brake pedal feels spongy or soft. This is caused by air getting into the brake lines. When the air gets into the brake line, it reduces the pressure applied to the wheel cylinders. As a result, the brake shoes don’t apply enough force against the rotor to stop the wheels.

What happens if you don’t change your brake fluid? What happens if I don’t change my brake fluid?

If your brake fluid has been sitting too long, it may become contaminated with moisture. Moisture can cause rusting and corrosion of brake parts. Over time, this can lead to serious problems such as brake failure.

If you don’t change your fluid, you may also experience brake fade. Brake fade occurs when your brake pads wear down faster than they should.

It’s caused by the buildup of contaminants in the brake fluid. These contaminants reduce the effectiveness of your brake pads.

How do you change your brake fluid? How do I change my brake fluid? Do I need special tools?

You’ll need to remove the old brake fluid first. To do this, turn off your engine, open the hood, and disconnect the negative battery cable. Then, pull out the brake fluid reservoir cap. Remove the old brake fluid using a funnel or container.

Keep the new brake fluid away from heat sources like the radiator. If you’re unsure how to remove the old brake liquid, ask your local auto repair shop for assistance.

Next, fill your brake fluid reservoir with the new brake fluid. Make sure to follow the manufacturer’s instructions for proper filling.

What type of brake fluid should you use?

There are many different kinds of brake fluid available today. They vary in price, color, viscosity, and other characteristics. Some brake fluids are made specifically for cars; others are designed for trucks or motorcycles. You can find brake fluids that are compatible with your specific vehicle.

The best way to choose which brake fluid is right for you is to test it yourself. Find a safe place where there aren’t any moving vehicles. Fill up one of your brake calipers with the fluid you plan to use.

Drive around at low speeds for about 10 minutes. Check the brake pad wear after driving. If the pad wears unevenly, you may need to switch to another brand of brake fluid.

How do you know if your brake fluid is low? How do I know if my brake fluid is low?

Brake fluid levels will usually show on the side of the reservoir. The level should be between 1/4″ and 3/8″. If your brake fluid level is below this range, your brake fluid is low.

Routine Maintenance for Brake Fluid Flushes:

Check your brake fluid every month or so. If your brake fluid looks dirty or smells bad, check your brake fluid level. If your brake fluid is low, add more until the level reaches the recommended amount.

When checking your brake fluid level, make sure not to overfill your brake fluid reservoir. Doing so could damage your brake system. Also, never let your car sit with the brake pedal depressed for an extended period. This can cause the brake fluid to leak into the wheel cylinders.

When you have checked your brake fluid level, you can start your car and drive around for several miles. This will help ensure that your brake fluid isn’t leaking. Stop immediately and call a professional mechanic if you see any signs of leakage.

How does a brake fluid flush work?

A brake fluid flush is performed to clean out dirt and debris from the brake system. It helps prevent the clogging of brake components and keeps them working properly. A brake fluid flush removes excess water, sludge, and other contaminants from the brake system.

What is the best brake fluid to use?

You can use any brake fluid as long as it meets DOT specifications. However, some brake fluids are better than others. Here are some things to consider before choosing a brake fluid:

Color, Viscosity, Anti-freeze, Odor, Cleaning Agent, leakage Resistance, Compatibility, Cost – Safety, Environmental Impact, Warranty.

What are the benefits of using brake fluid?

Brakes are important safety devices that keep your car from moving forward. Without brakes, you would end up crashing into something. Brakes also stop your vehicle from rolling backward.

When you apply pressure to the brake pedal, the brake pads push against the rotors. As the rotors turn, they create friction. Friction causes heat. Heat builds up inside the brake system. Over time, break.

How often should you change your brake fluid?

The life span of brake fluid depends on how much you use your brakes. You should change your brake fluid every year or two. To determine how often you should change your brake fluid, multiply the miles per gallon by three (3).

For example, if you drive 15,000 miles yearly, you should change your brake fluids for two years.

What is the difference between DOT3 and DOT4 brake fluid?

DOT stands for “Department of Transportation.” The Department has approved the DOT3 brake fluid for Transportation. DOT4 brake fluid has been approved for commercial vehicles.

Both types of brake fluid meet DOT requirements. They both contain similar ingredients, but DOT4 brake fluid contains higher amounts of anti-corrosion agents.


If you are replacing your brakes, it is also recommended to replace your brake fluid. This will ensure that your brakes are working correctly and efficiently. Not changing your brake fluid when changing your brakes could lead to decreased braking performance and increased wear on your brakes.

John D. Archer

John D. Archer is a mechanical engineer and writer based on the area of automotive accessories at, A resident expert and professional, John is passionate about all things automotive and loves to share his knowledge. He has good experience in all kind of automotive accessories. He has worked as a chief mechanical engineer in some reputed automotive garage firm.