Brembo Problems, please help

[Travis1807]

So i just had some Brembos installed on all 4 corners and now my brake pedal has a ton of travel in it compared to the stock set up. The shop that did the install said it was do to the different amount of pistons and the piston sizes from the stock set up.

Does anyone else with Brembos have this problem?

Can this be fixed???


Appreciate the help

[Travis1807]

Originally Posted by MisterJudyMoncada

No issue on mine at all. I would contact Race Technologies who is the US Distributor. I would also potentially take it to Auto Couture in New Jersey or Eurotech motorsports -- if those werent the shops that did the install -- and have someone independent look over the install/bleeding/etc.

Thanks for the info!

[m32]

I'd also make sure they bled your brakes and there's no air in the system

Edwin

[pachieh]

You need to have the brakes fully bled again to ensure there is no air in the lines. Like the others have said, almost guarantee this is the problem.

Has nothing to do with more pistons or what not. Feel should be exactly the same if not better if they did it correctly.

[m32]

Originally Posted by pachieh

You need to have the brakes fully bled again to ensure there is no air in the lines. Like the others have said, almost guarantee this is the problem.

Has nothing to do with more pistons or what not. Feel should be exactly the same if not better if they did it correctly.

also need to make sure they properly bedded the brakes. I agree with pachieh, if you got a full rear brake system, it should have more bite, not less

Edwin

[Travis1807]

I was told they bled the brakes.

Should I assume it wasn’t done correctly or wasn’t done at all?

[m32]

Originally Posted by Travis1807

I was told they bled the brakes.

Should I assume it wasn’t done correctly or wasn’t done at all?

If you press down on the brake pedal and it's really soft with not much bite, I'd assume the brakes were not bled. the other thing is make sure there's no leak in the lines.

Is this a performance shop that did the install?

Edwin

[Travis1807]

Originally Posted by m32

If you press down on the brake pedal and it's really soft with not much bite, I'd assume the brakes were not bled. the other thing is make sure there's no leak in the lines.

Is this a performance shop that did the install?

Edwin

when I push on the brake pedal i get no resistance at all for the first few inches and then it tightens up. it just feels real off from stock and how much i need to depress the brake pedal for it to work compared to the gas.

and yes it was done by a very reputable speed shop.

[m32]

Originally Posted by Travis1807

when I push on the brake pedal i get no resistance at all for the first few inches and then it tightens up. it just feels real off from stock and how much i need to depress the brake pedal for it to work compared to the gas.

and yes it was done by a very reputable speed shop.

I had 6 pot and 4 pot brembos on my range rover sport and never felt like it was soft. I would take it back and say this is a safety issue for you and need them to look at it. You're basically risking your life (and others) in a $100K+ SUV. For me, it's not worth risking and would def have them recheck it

Edwin

[pachieh]

Exactly... You have a safety issue, the only place I'd drive it is straight to get it fixed.

It is possible to have the brake fluid reservoir look full but still have air in your lines. If I remember correctly, this usually happens when they are bleeding, don't keep the bleeder tank filled enough with fluid, and suck air in when it runs dry (since the whole thing is under a vacuum state). Then, they top it off to make it look normal without knowing it happened. You can usually tell because you get a very audible sucking noise when the bleeder tank goes empty.

You pedal should be rock solid and even more touchy since you got a BBK vs stock.

Even reputable speed shops make mistakes.

[Travis1807]

Originally Posted by pachieh

Exactly... You have a safety issue, the only place I'd drive it is straight to get it fixed.

It is possible to have the brake fluid reservoir look full but still have air in your lines. If I remember correctly, this usually happens when they are bleeding, don't keep the bleeder tank filled enough with fluid, and suck air in when it runs dry (since the whole thing is under a vacuum state). Then, they top it off to make it look normal without knowing it happened. You can usually tell because you get a very audible sucking noise when the bleeder tank goes empty.

You pedal should be rock solid and even more touchy since you got a BBK vs stock.

Even reputable speed shops make mistakes.

Appreciate the info.

[Grayblack]

I’ve had a similar issue in the past after installing bbk’s. The shop bled the brakes again and the issue was resolved.

[onfireX5]

Take this comment with a grain of salt as I’m not 100% sure..,.,,,could also need a program update. Some of the X5 guys had to do some updates when going to larger brakes.

[r33_RGSport]

Sounds like improper installation and sounds like that shop doesn't know how BBK works.
Make sure the calipers are installed in the correct position, rotors are in the correct direction, bled in the correct way, and bed the brakes afterward.

[aas5]

Hey guys, aren't the stock breaks on X5M and X6M already Brembo's?

[iconoclast]

yes. they are 6 piston brembo caliper / brake system. i am not sure what the OP installed or why but if you have a plain jane X5 and upgraded to the MPBK or a brembo kit then you need to code the brake system into acknowledging the system and compensating for the new calipers at the booster.

[Travis1807]

Originally Posted by aas5

Hey guys, aren't the stock breaks on X5M and X6M already Brembo's?

They are but I believe they are 4 piston upfront and 2 piston in the back. The brembos are 6 in the front and 4 in the rear.

[iconoclast]

[pachieh]

Originally Posted by Travis1807

They are but I believe they are 4 piston upfront and 2 piston in the back. The brembos are 6 in the front and 4 in the rear.

Originally Posted by Travis1807

They are but I believe they are 4 piston upfront and 2 piston in the back. The brembos are 6 in the front and 4 in the rear.

OEM is six piston front, single piston rear.

I personally don't like the rears, you'd think at better styled caliper would come with a $100k+ SAV. That's what makes the Brembo mod the gents in Russia are doing so intriguing...

[Skyracer]

Originally Posted by iconoclast

if you have a plain jane X5 and upgraded to the MPBK or a brembo kit then you need to code the brake system into acknowledging the system and compensating for the new calipers at the booster.

The last time I installed a BBK on a car was 15 years ago. It would appear that times have changed... you seriously have to 'code' the system? What exactly does this do? Are the X5M brakes not hydraulically assisted via direct link from the brake pedal or are you saying that they are brake by wire with no physical connection between the pedal and cylinder and an electronic link that can therefore be altered? How do you 'code' for different aftermarket systems if BBKs does not come with proprietary programs for uploading into the car?

[Skyracer]

Originally Posted by pachieh

I personally don't like the rears, you'd think at better styled caliper would come with a $100k+ SAV.

You've hit the nail on the head. Strictly cosmetic.

[iconoclast]

Originally Posted by Skyracer

How do you 'code' for different aftermarket systems if BBKs does not come with proprietary programs for uploading into the car?

you don't. it's for vehicles that have MPBK available or share platforms with vehicles that are "plain jane" variants of an M model. i have done this on F15 and F31. if you install a BBK you have to code for it otherwise the pedal goes straight to the floor with hardly any bite and it feels like you have to stand on the brake pedal for it to make the vehicle stop in addition makes the braking feel worse than before. if the OP has an X5M and swapped out to a four corner kit then i have to imagine it is air in the lines or may need to be coded for the ceramic brake kit which i believe is four corners of "big brakes" versus having rear single piston. in any event without more information from the OP and proper details i don't think anyone on here can do anymore than speculate and throw out possible solutions.

http://www.bimmerfest.com/forums/sho...9&postcount=26