BMW 1 Series Coupe Forum / 1 Series Convertible Forum (1M / tii / 135i / 128i / Coupe / Cabrio / Hatchback) (BMW E82 E88 128i 130i 135i)
 





 

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      07-25-2012, 12:17 AM   #23
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Quote:
Originally Posted by nik0123 View Post
Hi guys sorry to thread jack.
Can somebody confirm the OEM rear 135 2008 brake pad part number, I have conflicting numbers. Is it 34216791421 ? The other number I have seen is 34216784808 (has this been discontinued)
Cheers
Nik
Not sure where you got that from.

There are two part numbers listed for rear brakes on an 08 135.

34216778649- classified as 'not suitable for performance parts'

34216795754- classified as 'alternative part BMW accessory'.

I'm guessing there was a BMW Performance brake package offered on them. Sorry those are the rotors.

Pads are as you detailed 34216784808 and 34216791421 is the update.

I'd run aftermarket with better fluid if you are replacing the stock pads though and do any track work etc.
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      07-25-2012, 12:30 AM   #24
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Thanks for the reply. So I am right ?
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      07-25-2012, 01:33 AM   #25
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Quote:
Originally Posted by cooler2442 View Post
I find that they are only noisy if they aren't bedded in properly. At first the shop put them on and bedded them in really well so they made 0 noise for a few months then they started getting noisy and then the noisiness went away after I'm assuming they got rebedded in.
You are probably right. I think the problem was I didn't drive the Audi hard enough often enough, not having that problem with this car
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      07-25-2012, 04:10 PM   #26
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Quote:
Originally Posted by nik0123 View Post
Hi guys sorry to thread jack.
Can somebody confirm the OEM rear 135 2008 brake pad part number, I have conflicting numbers. Is it 34216791421 ? The other number I have seen is 34216784808 (has this been discontinued)
Cheers
Nik
34216784808 has been superseded by BMW to 34216791421. Below is a photo of what you'd get if you ordered 34216791421.

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      07-25-2012, 05:51 PM   #27
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Quote:
Originally Posted by ECSTuning
Quote:
Originally Posted by nik0123 View Post
Hi guys sorry to thread jack.
Can somebody confirm the OEM rear 135 2008 brake pad part number, I have conflicting numbers. Is it 34216791421 ? The other number I have seen is 34216784808 (has this been discontinued)
Cheers
Nik
34216784808 has been superseded by BMW to 34216791421. Below is a photo of what you'd get if you ordered 34216791421.

Thanks for the reply , coincidence that you replied, you will see my large order of parts in the next few days
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      07-25-2012, 11:11 PM   #28
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Stu, so what did you do for your brakes?
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      07-25-2012, 11:36 PM   #29
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Quote:
Originally Posted by pavo335 View Post
Stu, so what did you do for your brakes?
They're ok for street use so going to use them as is for now with oem pads...

will look into a caliper upgrade before the next track day.
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      07-25-2012, 11:42 PM   #30
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Quote:
Originally Posted by bmroxm5 View Post
They're ok for street use so going to use them as is for now with oem pads...

will look into a caliper upgrade before the next track day.
i assume you mean with new pads

lucky that the rotor is ok I guess, i'd have thought with the drive home you might have rooted the rotor as well.
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      07-26-2012, 12:05 AM   #31
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Quote:
Originally Posted by pavo335 View Post
i assume you mean with new pads

lucky that the rotor is ok I guess, i'd have thought with the drive home you might have rooted the rotor as well.
yeh the rotor is pretty rooted, this is just a temporary street solution for a week or two till I get some Hawk pads in for myself to use with the ECS 2 Piece rotors... would be good for track, except I still need to address the cracked piston issue.
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      07-26-2012, 01:14 AM   #32
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I'm wondering if the ECS 2 piece rotors will help reduce the brake temps. Any ideas?
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      07-26-2012, 01:36 AM   #33
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Quote:
Originally Posted by John_01 View Post
I'm wondering if the ECS 2 piece rotors will help reduce the brake temps. Any ideas?
Probably yes (I have some ECS 2 Piece rotors to go on)

But then you'd need to upgrade the pads to a harder compound...

and then there are still plenty of people reporting cracked pistons/piston seals with firmer pads.
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      07-26-2012, 03:49 AM   #34
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Pav it might have happened when he and mo were mowing the lawn.
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      07-26-2012, 03:42 PM   #35
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Quote:
Originally Posted by davo135i
Pav it might have happened when he and mo were mowing the lawn.
I hadn't considered that, mmmmmm, you know what you could be onto something there. Hehehehehe
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      07-27-2012, 12:55 AM   #36
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Be interested to see how the ECS rotors go. They certainly look good
I'm ordering some Ferodos and Castrol SRF.
Hopefully that makes a big difference because I'm not that impressed with the 135i brakes.
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      07-27-2012, 02:45 AM   #37
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Quote:
Originally Posted by bmroxm5 View Post
Probably yes (I have some ECS 2 Piece rotors to go on)
But then you'd need to upgrade the pads to a harder compound...

and then there are still plenty of people reporting cracked pistons/piston seals with firmer pads.
The lower the brake temps, the lower the chance of cracked pistons, melted pads etc. Another idea might be custom brake cooling ducts for track use. I'm just thinking out loud here.
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      07-30-2012, 11:00 AM   #38
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I've had a few guys making custom backing plates for the pads to help protect the pistons. Just another idea to ponder over.
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      08-02-2012, 05:56 AM   #39
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Quote:
Originally Posted by ECSTuning View Post
I've had a few guys making custom backing plates for the pads to help protect the pistons. Just another idea to ponder over.
Yeah, I'm using HardBrakes Titanium backing plates.
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      08-14-2012, 10:08 AM   #40
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Quote:
Originally Posted by TimMc View Post
Yeah, I'm using HardBrakes Titanium backing plates.
Be careful.
While the Ti backing plate may be beneficial for the pistons issue, it may go in the opposite direction for the pads - which can run hotter since less heat is flowing to the caliper.

The problem is somewhere else: the OEM pads are street pads. Period.
Their optimal temperature cannot met the range given by a serious track use; otherwise they would not provide optimal brake coefficient when cold-braking (that is, normal road use).
Switch to real track stuff is mandatory for all uses other than road/light/fun.

Cheers
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      08-17-2012, 12:14 AM   #41
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Quote:
Originally Posted by annalisa_ferri View Post
Be careful.
While the Ti backing plate may be beneficial for the pistons issue, it may go in the opposite direction for the pads - which can run hotter since less heat is flowing to the caliper.

The problem is somewhere else: the OEM pads are street pads. Period.
Their optimal temperature cannot met the range given by a serious track use; otherwise they would not provide optimal brake coefficient when cold-braking (that is, normal road use).
Switch to real track stuff is mandatory for all uses other than road/light/fun.

Cheers
Bedankt. I'm changing fluid tomorrow and better pads are on the list!
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      08-17-2012, 07:04 AM   #42
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I posted my cracked pistons/piston seals with pictures back in 2008. Can't believe BMW has not done anything to fix this issue! My car had only done 2000km or so at that stage with a few track days. I changed to massive AP Racing brakes and it was the best think for my car. Until today, I still have those 135i brakes with the cracked pistons. Question is, are the pistons ans seals replaceable?
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      08-17-2012, 07:12 AM   #43
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What are you doing here stranger?
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      08-17-2012, 07:57 AM   #44
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What are you doing here stranger?
Looking for you. . Where's pic of the 1M?
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