I have a 54 saab 9-5 that has lost pressure on the brake pedal, fluid level keeps dropping to very low and there is a whoosh sound from around the servo, does anyone have any idea as to the problem.

A leak in the brake system - faulty master cylinder -no brake fluid -damaged or worn brake pads /shoes ....first check your fluid level if none fill and look around and under vehicle if none found check brakes if faulty or none replace and repair then bleed system

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You have a bad vacuum booster. The diaphragm in the booster is ruptured resulting in vacuum loss and no power assist to the brakes. Do not drive in this condition, loss of control (stopping) hazard exist.. Replace Power Brake Booster. Since replacement of the booster requires removal of the master cylinder, replace the master cylinder as well, It is old (2003) and time for replacement

POSSIBLE CAUSES TO YOUR CLUTCH PEDAL PROBLEM. COULD BE BRAKE FLUID LEVEL LOW CAUSING YOU TO GET AIR IN THE HYDRALIC SYSTEM.IF FLUID WAS LOW CHECK FOR FLUID LEAKS AROUND LINES TO CLUTCH MASTER CYLINDER AND CLUTCH SLAVE CYLINDER.IF FLUID LEVEL ALL GOOD. LOOK FOR A BROKE CLUTCH RELEASE BEARING OR FORK.CHECK FOR BROKEN DIAPHRAGM SPRING IN CLUTCH PRESSURE PLATE.

have you topped up the brake fluid level,if so unscrew it again and replace,is the brake fluid leval ok,the only other item that will keep light on is a faulty switch behind the pedal.get a can of silacone spray and spray it on the switch at the back of pedal and see if this works,put a cloth over the pedal to stop the oil dropping on the pedal.adrian,,,

If it's the red light, it means you are low on brake fluid. Usually because the brakes are so worn that the fluid is all in the calipers. Check the front brakes for wear.

Look at fluid level, some systems invoke the parking light for low fluid. I presume to confuse you. I think the thinking works like this: When you have full new brakes and full M/C by the time the M/C fluid gets consumes by prake pad consumption, the light goes off. If you replaced the front pads, the fluid gets pushed back into the M/C resovoir, and the light goes out. Bet that you are pretty close to needing pads, presuming no leaks or other issues.

hi, if you look at the back of the brake drum you will see a little bleed nipple just sticking out think its an 8ml or 10ml spanner fit, what you then need to do is find a piece of plastic pipe that will fit over the top of this to catch any fluid then make sure the brake fluid is topped up, you then need someone in the car to operate the brake pedal and some one at the back where the bleed nipple is once you have this you need to do the following

1 undo bleed nipple a couple of turns
2 get person in the car to push brake pedal to the floor and hold it on the floor.
3 when pedal is at floor tighten the bleed nipple up and get the person to let the brake pedal come up.
4 when pedal is up all the way undo bleed nipple and get person in car to push pedal to floor.
5 when pedal at floor tighten bleed nipple up
6 let pedal up
7bleed nipple undo a bit
7 pedal down to floor
8bleed nipple do up
9 pedal up
10undo bleed nipple

now keep doing that until all you have got coming out is fluid and no air when you have this do bleed nipple up and check the brakes to make sure they are not spongy.

whilst doing this you need to make sure the brake fluid level dont drop to low as you will have to bleed the front as well so keep checking the level and make sure its well topped up throughout the whole process

if you have any problems give me a shour back ok

Hi:
The first thing to determine on your car is if it is safe to drive: Check your brake fluid level in the reservoir, and make sure you don't detect any leakage around any wheel/ tire areas. Your ABS light can be scanned and tell you what tripped it. Most auto parts stores, such as auto zone, will do this for free. The most common cause is usually a bad or dirty wheel speed sensor, but have your car checked out to narrow down the problem.

You Must determine that Master Cylinder is NOT LEAKING into the Brake BOOSTER this is a Leak that CANNOT be Detected Easyly, If not Rear Brake SHOES Worn OUT Can CAUSE LOW Brake Pedal Problem