Question about 1990 Nissan 300ZX

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Why does my brake fluid drain so quickly? How can i fix it?

The brake fluid level goes to the min line in about a week to a week and a half. I've taken the car to multiple mechanics but they couldn't locate a problem.

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There is a leak, possibly a brake line or internal leak in Master Cylinder.

Posted on Apr 06, 2015

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I have 2012 Corolla, brake pedal is goes floor and very low brake also. I have changed Brake vacuum and master cylinder. but the problem still not solve.


You didn't say so I'll ask. Did you bleed the brake lines? Any time you deal with brake fluid replacement you need to do this. Air gets trapped in the system and causes exactly what you are describing.

There are several methods to drain fluid and air from system. I have used both the vacuum method and assistant / friend method. Here is a video on YouTube which shows the methods. You can search for more detailed videos if you want.

Make sure you have the correct fluid for you system, Dot 3 or 4 most likely, and make sure you have plenty of it since you don't want to get half way through and run out. You can always return unopened bottles for refund.

Hope this helps.

Apr 02, 2015 | 2012 Toyota Corolla

1 Answer

How to fix brakes that goes to the floor after i replaced the master cylinder


You must have air in the brake lines. You will have to bleed the lines to get the air out. You will have to locate the bleed valve near each wheel. It is easier to take off the wheel so you can see everything. The brake line will have a drain screw near the place that the line goes into the brake caliper assembly. You will need a helper. Loosen the screw a bit then have your helper press the brake to the floor. Fluid and/or air will come out. While they hold it to the floor, tighten the screw so it won't such air back in when the brake peddle is released. With the brake pedal released, open the drain screw again and have the helper press the brake to the floor again. Repeat this until no more air comes out when the brake pedal is pressed. Then move to the next wheel and repeat. During the process make sure that the fluid in the master cylinder does not run out. The level will drop each time you bleed some of it from the bleed valve (or drain screw or whatever you want to call it). It helps to open the drain screw just enough to let a little fluid out. You won't waste as much that way. By time you get through with the last wheel the brake should not go to the floor anymore.

Mar 12, 2015 | 1997 Toyota Corolla

1 Answer

Brake pedal goes almost to the floor


Is the brake fluid low in master cylinder reservoir? Notice any fluid around the area. Have you checked your brake cylinders for brake fluid leaks?

Jun 26, 2014 | 1993 Mercury Tracer

2 Answers

Clear color oil leak appears to be mostly in the front under front wheels is where I noticed it


Most likely BRAKE Fluid. !! Pull the wheels (one at a time if doing it yourself) and closely inspect the calipers and flex line to them and teh connections to the metal line which goes to the brake master cylinder.
Its worth taking to a brake shop for inspection. Quick look is usually free.
CHECK YOUR BRAKE FLUID LEVEL BEFORE DRIVING FURTHER.

Jul 21, 2011 | Hummer H2 Cars & Trucks

1 Answer

Break light coming on dash. Goes off and on. Is it safe to drive? What do I check for under the hood? and where?


Hello. Welcome to FixYa. Please allow us to assist you.

We are sorry that you are having issues with your Toyota.

What you are describing, the brake light illuminating on and off may be due to s low brake fluid condition in the brake master cylinder reservoir.

There is a sensor in the master cylinder that monitors the quantity of the brake fluid present. As the brakes wear, the fluid level drops proportionately.

What you can do:
Open the hood, and closely examine the fluid level in the plastic reservoir on the brake master cylinder. It is located at the engine side of the firewall, pretty much in line with your turn signal switch. Look at the side of the cylinder reservoir. There will be a "MAX" line, and a "MIN" line.
The Max is the proper fill level.

If the fluid level is close to the Min line, you probably need some front brake pads replaced.
This indicates a low fluid condition in the reservoir.

We would not suggest 'topping off' the fluid, just to extinguish the light. When you do get your brake pads replaced, the extra fluid will be forced out of the top of the reservoir, and the brake fluid will get on the paint under your hood. Brake fluid will damage your paint.

Suggestion: Get the front brake pads checked, replace them if they are worn.

Thanks for choosing FixYa today.
If you have any other questions, please feel free to get back to me.

Oct 27, 2010 | 2001 Toyota Camry Solara

5 Answers

My brake light comes on while driving but the parking brake is not on. Does this mean there is a problem with my brakes? This has happened 4 times in two days. It come on, makes the alert buzz then goes...


Have you checked your brake fluid level? Sometimes, when the brake fluid is just a <little> too low, the brake error light will come on momentarily.
Sometimes parking brakes also stick a little (the cables tend to bind occasionally). This could also be your problem (although I rather doubt it).
Failing this, a quick check of the rotors, calipers, pads, fluid levels and system operation would be advisable.
Hope this helps, Sherwin

Dec 29, 2009 | Chrysler Town and Country Cars & Trucks

2 Answers

Brake light comes on


Check the brake pads they may have reached to a state where they require replacing.. (worn-out)

Oct 16, 2009 | 2006 Suzuki Forenza

1 Answer

What is the proper brake fluid level


There should be a Min. and Max. line on the reservoir where you add the fluid. it should be somewhere in between. As your brake pads wear down, the fluid level will go down to compensate. if its been a while since you have had brakes and the level is down a bit, but still above the Min. line, you shouldn't have to worry about it. (just make sure your pads are ok)

Mar 19, 2009 | 2006 Hyundai Sonata

1 Answer

1994 Toyota 4x4 Brake Warning Light Going on and Off


You have one of two problems.

The most common issue it low brake fluid in the master cylinder. As the brakes wear down, the brake fluid level drops proportionally. On the side of the master cylinder is a sensor, that measures the fluid level. Open the hood and check the level. If is is anywhere close to the "MIN" line, you may have some brakes that need replaced.

The second issue, and it is more rare, is the park brake cable rusting, and hanging up.

Easy way to check either: When the light comes on, open the hood and unplug the wire going to the sensor on the side of the master cylinder. If the light goes out, your fluid level is the issue.

Thnaks for choosing FIxYa for advice!

Mar 10, 2009 | 1994 Toyota Pickup

1 Answer

Emergency barke light


ck the fluid reservoir under hood on driver side be windshield. the fluid level could be right at the "min" line which will turn the lite on and off at times. (which should lead to brake inspection). top off and check to see if problem goes away

Nov 23, 2008 | 1999 Toyota Camry Solara

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