Megane III Brakes Problem - Renault Forums :: Independent Renault forum

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post #1 of 29 (permalink) Old 18th February 2015 Thread Starter
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Megane III Brakes Problem

Hello, I am writing about a brakes problem on my Megane 2011 model. It all started in December when i realized the brakes pedal is a bit soft and it doesnt stop as it should be. After a visit to a local garage they said my rear back wheel was blocked and the pads were a bit rusty so they tood them out and cleaned them. I was told there is air in the front left wheel and they bled the system oldfashion way. After a week it was the same so it was bled again, and the same no brakes after 2-4 days. I went to a Renault dealer and i explained what is wrong so they bled the system and it only lasted 3-5 days again. The symptoms are. pedal getting soft when u press the brake pedal and if u try to stop in emergency only front right wheel locks the left one looks like doesn't stop. I went back to Renault and they said its the master cylinder. They replaced the cylinder with a brand new one and bled the system. Again after a week the same story again. Also I noticed when i press the brakes pedal a noise like air coming out sound like from the servo and when u pump the pedal few times the pedal not only gets harder but the servo makes strange noises for a while and then stops. I went again to Renault garage and the said the will pressure bleed this time, so they did and the car was perfect for 7 days. on the 7th day i was driving and i had t stop hard in an emergency and the abs on the car was working in order to stop and immediately after that i felt like there is something wrong with the brakes again. 4 days later i have again air in the same left from wheel and no proper brakes. They told me in Renault its probably the servo but probably yes may be not it costed me a fortune so far and even more to replace servo if I decide to. Please anybody with similar problem or a clue what is doing all this, is it realy servo, is it some air still left to give me an advice.
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post #2 of 29 (permalink) Old 7th June 2015
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Re: Megane III Brakes Problem

Hi I have the same problem with a 2010 Megane 3. I've bleed the brakes and after 2days the pedal has gone soft again. Did you have any luck getting yours fixed?
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post #3 of 29 (permalink) Old 10th September 2015
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Re: Megane III Brakes Problem

Same here. Exactly the same problems... Only problems lately with my megane. Did u find a solution?
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post #4 of 29 (permalink) Old 10th September 2015
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Re: Megane III Brakes Problem

Old brake fluid can lead to spongy brakes. Especially if the brakes are being used hard.

Getting air into system.
Has to be a leak somewhere.
Usually a visual inspection will identify if a pipe or fitting. Give flexible pipes a really good look as the covering and dirt can obscure a minor leak.
Suspect any solid pipes that look bulged even if not wet.
Otherwise it's caliper seals or master cylinder.
If a decent leak it is usually shown by wet around the piston.
If, as in the OP, it always seems to be one caliper that needs bleeding, that has to be suspect even if no outward signs of a leak.
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post #5 of 29 (permalink) Old 10th September 2015
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Check all pipes going into the ABS control unit located on the bulkhead. I ended up replacing the unit with one from a car dismantlers at a price of ?150. Problem solved.
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