Will I need to change my brake fluid?

Someone drove my car for a short distance and left the hand brake on. They drove about 0.3 miles and at a speed of less than 30 mph. Should I get this checked out?

My car has 2000 miles.
My car has an automatic transmission.

Experienced mechanics share their insights in answering this question :
Hello. Your emergency brake is not dependent upon using brake fluid as your normal front and rear stopping brakes are. The emergency brake is typically a brake drum with a cable. The damage may not be too bad given the short distance, however you may want to have an expert from YourMechanic come to your home to perform a brake inspection to be sure it is functioning properly after this.

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Our recommendation:

It is a good practice to change brake fluid every 24,000 miles or 36 months. Always use a fluid recommended by your vehicles manufacturer (do not use silicone based brake fluids if your car needs regular brake fluid).

Answer: Yes, flushing or changing the brake fluid is legitimate preventive maintenance for your car. We typically recommend a brake fluid flush when we`re already changing brake calipers, pads or rotors.
Genuine Mazda Fluid (0000-77-130E-10) DOT-3 Brake Fluid – 12 fl. oz.
YOU SHOULD REPLACE BRAKE FLUID EVERY FEW YEARS

And the best way to find out how often to change brake fluid is to follow your manufacturer`s recommendations. Some manufacturers say you should replace your brake fluid every two years. Others recommend every three years, or every 45,000 miles.

If you do not change the brake fluid, the moisture absorbed by the fluid builds up throughout the braking system. As the water content increases, the boiling point of the brake fluid becomes lower. It will cause excessive heating and make the fluid boil, rendering your brakes inefficient.
Brake Fluid DOT 3; 12 Oz.
Most manufacturers recommend that any open bottle of DOT brake fluid should be used within 12 months, or else discarded. Keep in mind that a full year is the very outside limit of what would be acceptable.
Never reuse brake fluid that has been drained from the brake system or even fresh fluid that has been allowed to sit in an open container, because brake fluid is quickly contaminated by dust, air, and moisture. If your brake system uses DOT-5 brake fluid, do not add either DOT-3 or DOT-4 fluid.
Most manufacturers recommend that any open bottle of DOT brake fluid should be used within 12 months, or else discarded. Keep in mind that a full year is the very outside limit of what would be acceptable.
SERVICE DETAILS

Base scheduled maintenance is due every 10,000 km, but no longer than 12 months, whichever comes first.

Mazda recommends that you change your Mazda3 oil every 7,500 miles or 12 months. If you have a heavy Palmetto commute, change your Mazda3 oil every 6 months or 5,000 miles.

Relevant Questions and Answers :

the most relevant questions and answers related to your specific issue

Rear brake job
ANSWER : Hello, thank you for writing in. These situations are understandably questionable. The service providers at a lot of common oil changing and tire repair centers will quote you for a variety of things that can be updated. This does not always mean you are in dire need for more repairs. If braking seems to be harder, spongy, or takes longer, then you have reason to be concerned. Otherwise, you should check the amount of brake pad material left on the calipers. This can be visually inspected without too much trouble. Remove the wheel and physically measure the amount left, compare them to your vehicle specifications. It is a little early to worry about brake fluid or the rotors. However if the brake fluid is low, the rotors are warped from a hard stop, or there are obvious issues you should look into the system further. Only further inspection will confirm or deny the recommendations. For a second inspection, contact our service department to schedule an appointment.

Do I need to get the transfer case fluid and transmission fluid changed?
ANSWER : Hi, thanks for writing in. I looked at your maintenance schedule for your vehicle and found that for up to 150,000 miles, it only says to inspect the fluid level and not change it. The fluids are special fluids and if you did need any work done (i.e. if there is a leak present or other mechanical problem) then make sure the correct Ford certified fluid is used.

When it is time for you to have your transmission fluid serviced, consider having a certified automotive technician from YourMechanic come to your home or office to perform the service for you.

Hope this helps and best of luck!

Low brake pedal and anti-lock brakes are not kicking in.
ANSWER : The brake pedal is working to stop the vehicle, but there may be air in the controller unit causing the ABS brakes to not function. I recommend bleeding the brake system from the farthest location from the master cylinder to the master cylinder including the ABS unit. If the brakes are still spongy after a full bleed, then the controller will need to be replaced. If you need further assistance with your brake pedal being spongy, then seek out a professional, such as one from Your Mechanic, to help you.

Brakes won’t let go after changeing main brake cylinder.
ANSWER : Rule out obvious causes such as sticking calipers. If you are positive that the caliper pistons are free and the pins in the torque plate are free as well, measure the brake line pressure at each wheel to determine both if the pressures are correct (and proportioning valve is working) and if pressure releases. If pressure is not releasing, see if failure to release is in one or both circuits (the brake system is sectionalized for safety). If the problem is global, the master cylinder is stuck. If this does not resolve it, request a brake system diagnostic – pressure testing and the responding certified mechanic will get this resolved for you. If you have further questions or concerns, do not hesitate to re-contact YourMechanic as we are always here to help you.

Brake pedal has very little resistance
ANSWER : From what you’ve described, I’d advise you to not drive the vehicle and get the brakes bled out. It’s possible that you still have a brake fluid leak in this case.

I’d suggest having this looked at by a certified technician, like one from YourMechanic, who can diagnose your brake system firsthand and bleed your brake system if necessary. Best of luck.

No brake fluid is getting to the rear brakes
ANSWER : As far as the brake issue, yes, there needs to be a check to see if there is brake fluid entering into the proportional valve. If there is fluid supply to the valve but not out then the valve will need to be replaced. Any electrical faults in the rear ABS system are generally indicated with a light illuminated and if so, then the flash codes can be read out. But with no light illuminated then there most likely no electrical failures in the system. If the source from where the brake fluid supply cannot be located, then you may want to enlist the help of a mechanic, such as one from YourMechanic, to help with the diagnosis of your brake system.

EPC light on 2004 Jetta. Code said brake switch faulty, but brakes lights worked. Replaced brake switch, now no brake lights.
ANSWER : Hi there. The first thing that pops in my mind beyond of what you have listed is perhaps the electrical harness attached to the brake switch. Perhaps the harness itself is damaged or you have an exposed wire, loose ground wire somewhere. You might want to have a professional mobile mechanic come to your location and complete a brake lights not working inspection to help you diagnose this issue.

When I put my foot on the brake my back left brake light goes off, when I take it off the brake the brake light comes on
ANSWER : I would suggest trying to disconnect and reconnect the wiring to the rear lights. I have seen these older Toyota vehicles rear lighting short out on the lights themselves due to the way the light circuit was made on the lamp housing. Look at the housing circuit on the light to see if one is touching another, and that could tell you why it is malfunctioning. There could also be a problem with the brake light switch. If you are not comfortable dealing with wires, I recommend getting in touch with a certified mechanic who can look at your brake light issue for you to see what’s going on.