E90 Drive-Off assist issues - premature rear brake wear

[Andy1GP]

I think if you're very in tune with your car you notice a lot of things. Having spent a lot of time Testing yesterday it seems only using the footbrake the system works fine everytime.

It's when parked on a slope and hand brake is used does it seem to stick and bind.

The squealing however is still there at random.

There might be a remote chance that I was just ranting prematurely and that the pads were worn out all along.

 

[herr bmw]

since my rear pads and disks were replaced,it works like a gem,no squealing,or noise

maybe just replace it and see

 

[Rayzor]

In most cases the squealing comes from the brake sensor cable, im sure it will go away after to replace your break pads and sensor :thumbs:

 

[ChefDJ]

You'll feel happier once you have new brakes on :thumbs:

 

[NavZ]

BMW often forgets to use copper paste.
So for those with new (& noisy) pads try that.
I know that happened to Philip, he applied copper grease & it was sorted.

 

[Andy1GP]

Busy taking pics to post a DIY on my E90 thread. Hopefully the new pads and sensor will be quiet. Unfortunately it's Febi pads. But will give them a go and give feedback.

@NavZ if you're referring to copper slip, that's an anti-seize compound and I only use it for the wheel bolts or other bolts to prevent them sticking/seizing to the material. Don't think it's a good idea putting that on the pads or disc.

Keep your eyes on the thread. Pics to follow soon...

 

[Rayzor]

Damn Andy whats taking so long :rollsmile:

 

[NavZ]

You put the anti-seize paste at the back of the pads NOT where they make contact with the disc :idea:
It's usually dust that gets stuck back there :thumbdo:

 

[Executer]

You put the anti-seize paste at the back of the pads NOT where they make contact with the disc :idea:
It's usually dust that gets stuck back there :thumbdo:

Cant see how that will prevent squeeling....:sorry:

 

[NavZ]

I heard good things about Febi, put them on my E46 just before I sold it.

---

You put the anti-seize paste at the back of the pads NOT where they make contact with the disc :idea:
It's usually dust that gets stuck back there :thumbdo:

Cant see how that will prevent squeeling....:sorry:

Some people swear by it, others aren't convinced.
Was just providing a suggestion.

http://forums.bimmerforums.com/foru...-Install-Question-Copper-Paste-vs-Anti-Squeal

 

[Andy1GP]

Sorry NavZ I nearly thought you made a fatal mistake :roflol: I see these febi pads have rubber rear ends and shouldn't squeal like the steel back ones.

I work slowly but I learn and discover things as I go. The rear brake sensor HAS to be replaced. I tried (for interest sake) to reset the OBC with the old sensor in place, and the sensor itself seems to be a wear indicator. Not like the E46 where it only completes a circuit.

I also clean the wheels properly and investigate the tyres for alignment wear.

Will post my findings soon. Just having a tea break and fitting the new sensor then wheel back...

 

[Executer]

The rear brake sensor HAS to be replaced.

I also discovered that the hard way when you helped me change my pads a while back
:tease:

 

[SP33DYV]

Sorry NavZ I nearly thought you made a fatal mistake :roflol: I see these febi pads have rubber rear ends and shouldn't squeal like the steel back ones.

I work slowly but I learn and discover things as I go. The rear brake sensor HAS to be replaced. I tried (for interest sake) to reset the OBC with the old sensor in place, and the sensor itself seems to be a wear indicator. Not like the E46 where it only completes a circuit.

I also clean the wheels properly and investigate the tyres for alignment wear.

Will post my findings soon. Just having a tea break and fitting the new sensor then wheel back...

The new 135i rear pads I bought last week also have the steel plate and then rubber on top of that.

 

[Andy1GP]

Thanks for all the input guys!

Job is done well and results are

No squeal no noise nothing. Just good braking. Also reset the brake service interval.

Took around 50 pics and just uploaded them. Busy with a loong post on the DIY thread.

---

Posted the rear pads DIY on here. Also included pics of where the sensor lives if anyone ever wanted to disable it.

http://www.bmwfanatics.co.za/showthread.php?tid=49164&page=6

 

[NavZ]

So I tried out the hill assist & it works quite well.
I may have noticed it once or twice but it seems more like the pads are sticking (to the disc) rather than an actual feature :flyfun:

I know driving forward down a hill is messed up and the car just brakes. Doesn't always do this though...

Tried to replicate this but couldn't. Driving/reversing uphill works but nothing happens when going downhill.

Glad you're sorted.
The squealing was probably due to worn brakes (since it's gone now too)
I'll be replacing mine soon but might be getting some performance pads from Powerbrake, maybe even some other goodies depending on the cost. :joy: