Brake bit

[rotoryboy]

Anyone know how much this part is?

8A0 721 401

My peddle has gone hard ish, so I changed the bomb (wasn't that) but I've been told that this is the next point of call. Is this right?

[Mikes2]

Think normal retail is around £175.

Hard pedal I would expect to be a servo or pump problem. Master cylinder usually results in the pedal going to the floor.

[rotoryboy]

Hard pedal I would expect to be a servo or pump problem. Master cylinder usually results in the pedal going to the floor.

Cheers, Have you got part numbers so I can see what I need?

[Mikes2]

I would have a specialist check first before throwing money at it.

The servo you can check by undoing the return line. If the line has a few drops the servo is ok. A steady stream means the servo is leaking.

The pump will need a pressure test. Specialist equipment only as the pressure is ~2000psi.

[rotoryboy]

Cheers. The peddle is normal as in it presses slightly, then goes hard about halfway down. If you are sat at a standstill and have your foot on the brake it judders under foot. Confused

[AndyP]

Cheers. The peddle is normal as in it presses slightly, then goes hard about halfway down. If you are sat at a standstill and have your foot on the brake it judders under foot. Confused

Mines started doing this recentley, feels like the ABS is kicking in even when you are sat at the traffic lights. Only does it every so often though, nothing consistant.

[Mikes2]

Mark,
Did you fit a new bomb or 2nd hand ?

[rotoryboy]

I fitted a trusted (working) used bomb from Sal

[ian_jemo]

I also get the same judder, I'm sure its the ABS,

If I'm not moving in the car and apply the brake firmly you can feel it.

It feels like the ABS because its trying to push back.

When I'm driving don't seem to get any problems

[Paulgo]

I had something not dissimilar with the cq20v. Turns out it was the lead worn through on one of the front the ABS sensors - it had been looped the wrong way when the suspension was upgraded and was able to rub against the inner wheel. Fortunately it was easy to fix!

cheers

Paul

[rotoryboy]

It's the push peddle hard yet doesn't really stop (just slows gently) that scares me. Emergancy stop? not a chance

[Mikes2]

If it didn't do this before, I would refit the original bomb.

[rotoryboy]

If it didn't do this before, I would refit the original bomb.

Its exactly the same with either bomb fitted. Thats why I think it's something else. But what?

[rotoryboy]

So, anyone know the part numbers of the bit behind the master cylinder?

[Jonas_R]

Well my ETOS says a 157,50 EUR

/Jonas R.