Car model, year?
Before going anywhere near the ABS unit you need a scan for fault codes. Removing it is a major operation. Been there, done that.

 

This is what I was thinking of, if I can confirm it’s the abs module

 

Renault megane mk3 2011, no fault codes fluid level hasn’t changed has now been bled twice by 2 different garages

 

That's very spendy for a unit with no fault codes. Wait awhile if you can, others are more knowledgeable on here.

 

Yeah, trying my aa parts and garage cover too, as it feels unsafe to drive at the moment.

 

We still don't know which car.
An ABS fault would show a light on the dashboard- a red one gets you a callout if you have Homestart, that's how I got my fault code confirmed.

 

Renault megane mk3 2011, my brakes a spongy and abs doesn’t work as it should so I should be able to call them out

 

But do you have an ABS light on the dash?

 

No light

 

Then dare I say it- I don't think your ABS module is faulty.
I would be very sceptical of replacing an ABS unit without so much as a warning light.

 

https://www.renaultforums.co.uk/threads/megane-iii-brakes-problem.373386/page-2 there is a post halfway down this one it sounds like a similar issue

 

I hope so, I’m going to see if the place that repairs can diagnose it properly but they don’t open till the 6th so seeing if anyone else has had something similar

 

HI, I just bought a 2019 Kangoo, it has the same problem, it's had the brakes blead twice, once by hand and foot method and the second time with a pressure machine. Brakes work fine when I leave the garage, but after sitting overnight it's the same problem. If I push too hard on the brake pedal the brakes grab, so I'm thinking it's a master cylinder plunger cup or O-ring (whatever this car has) that is worn out and allowing the fluid to leak through.

 

You guys need to take a step back and get a "proper" mechanic to do a "proper" brake system service - as in changing all of the fluid and then follow the built-in brake and ABS bleed procedures using a Renault-speaking scanner.

Air trapped in the ABS valve block will/can kill you and is not detectable by any brake testing station using a simple "rolling-road" test method.

Do not waste money replacing the ABS block

 

Please explain to me what you are talking about, this is my second Kangoo, the first was a service vehicle provided by my employer bought brand new, so any problems it was sent to the dealership.
I've rebuilt a lot of engines and transmissions, both automatic and manual, to finance my drag racing habit, but this new "fangled" stuff is a mystery to me.

 

The ABS system consists of a valve block with lots of hidden and normally unused passages and offcourse the electronic bits to drive the valves sitting on top of that.

No matter what you do, if you are old school like me, the normal method of bleeding brakes will NEVER ensure that those hidden passeges get either filled or bled ........................ and thus the first time you use/need the ABS block a bunch of air is released into the system.

There is a set procedure using the electronic valve actuators in a pre-set sequence to ensure that no trapped air is present in the valve block.

 

I would say try it first.
I was able to bleed my second-hand ABS pump but it took a lot of fluid (most of a litre) to get rid of the bubbles. Shortly afterwards the car passed the MoT, which is good enough for me.
Admittedly the ABS hasn't been engaged since, but I don't think we've ever braked hard enough for that.

 

Thanks for the info! So, what you're saying is it must go to Renault who is the only one that has the equipment to bleed it correctly, I'm gona hafta win the Lotto to afford that.
With the Kangoo service vehicle it cost 12,300XPF to to tell us what was wrong.
Thanks again

 

Nope not necessarily.

An Autel AP200 (white) scanner is very well versed in Renault and will most likely enable you to do the job yourself at about US60 .................. in addition to seeing to all the other things Renault electronics that may go wrong in the future.

https://www.renaultforums.co.uk/threads/renault-laguna-ii-abs-bleed-solved.604841/

 

Wow! Thanks man!
I'll check it out tomorrow, something so small the freight won't be very much to ship to Tahiti!!!