Help: installing x5m retrofit big brake kit

audi1199r · 11-07-2016, 12:13 PM

I was told by the dealer that the entire rear axle and hub have to come apart to install the rear portion of the x5m big brake kit on my 2011 x5 35D

does anyone have any tips on how to change the rear heat shields without removing the hubs?

any help would be appreciated

https://www.ecstuning.com/b-genuine-...t/34112348054/

Maranello055 · 11-08-2016, 02:04 PM

This looks like it is for the F15 judging by the link and Product details.

Qarban · 11-08-2016, 11:28 PM

Quote:

Originally Posted by Maranello055

This looks like it is for the F15 judging by the link and Product details.

They are from E70 X5M (will fit both E70 and F15, I may be wrong about fitment). The F85 X5M front and rear rotors are drilled

-c- · 11-09-2016, 02:34 PM

Lol dealers are so funny!

The rear calipers have special hangers that move them further out in order to fit the new larger rotor, the calipers are exactly the same caliper as the standard X5.

As far as the rear rotors the x5M and the f15M are swappable directly but as far as the standard X5 parking brake setup I'm not sure if it is different between the two. I've heard the hub has a different diameter between the two M and non M so that's where the big changes may be.

smyles · 11-09-2016, 03:42 PM

Is it even worth the effort installing rear M brakes? Aside from being blue, what are the benefits given the installation hassles and pricier replacements down the road?

Fronts are a different story, obviously.

Ryan5034 · 11-09-2016, 05:39 PM

Especially if the calipers are the same.

Qarban · 11-10-2016, 06:12 AM

And for the price of the E70 and F85 they should have come out with rear big calipers too like the Cayenne gts/turbo

UnicornM · 11-10-2016, 06:26 AM

As said above, carrier is different on the rear (caliper is same) and you'll need new hub since the center bore is 72.5mm vs 74.1mm on non M vehicles. I'd check RealOem on the internal brake setup but I think you'll be OK on that.

I guess you could get the rear disc bored out to 74.1mm if the internals of the handbrake/shoes are same.

blue dragon · 11-12-2016, 10:23 AM

I was going to say the rear hub size is different, so how are you going to use the X5M rotors without changing the hub (and getting centering rings for your wheels)

UnicornM · 11-12-2016, 01:36 PM

Bore them out. The hats are ally. Machine shop can easily remove the 1.6mm difference.

socale39 · 11-13-2016, 09:10 AM

All that work for rear brakes that are going to do very little work and look like standard calipers. I get doing the fronts but honestly I think it's a waste of time and money for the rears.

Gatoferoz25 · 11-14-2016, 05:00 AM

Quote:

Originally Posted by socale39

All that work for rear brakes that are going to do very little work and look like standard calipers. I get doing the fronts but honestly I think it's a waste of time and money for the rears.

Agreed

-c- · 11-14-2016, 09:00 AM

Quote:

Originally Posted by socale39

All that work for rear brakes that are going to do very little work and look like standard calipers. I get doing the fronts but honestly I think it's a waste of time and money for the rears.

But hey it will have a wonderfully big rear rotor so it's not a total wast.

Also you'd have matching rotors so I think it's worth it for a complete look.

Cattivo · 11-14-2016, 09:38 AM

It's worth it IMHO, not only do they look better than the OE rotors... I have noticed an significant improvement in stopping since swapping over to the F85 rotors

socale39 · 11-15-2016, 11:39 AM

Quote:

Originally Posted by Cattivo

It's worth it IMHO, not only do they look better than the OE rotors... I have noticed an significant improvement in stopping since swapping over to the F85 rotors

For the fronts, sure. The rears not so much considering what is involved to retrofit. Let's not forget, if the X5 only sees city driving it's a pointless endeavor from a performance standpoint. Most people aren't handling their vehicles beyond the stock braking performance.

jandref321 · 11-26-2016, 09:09 PM

I would talk to ECS about the fitment issue...even the F15 X5 has a 74.1mm rear bore but the kit says that it fits those vehicles and it's all inclusive.

godmans · 11-27-2016, 05:18 PM

If it were me, I would either go with an aftermarket BBK that is engineered to complement the stock X5 35i rear, OR go with the full X5M front and rear.

Rationale is that if you only go with the X5M front, you would likely have a front brake bias, where you are triggering the front ABS prematurely and thereby compromising the overall braking performance of the vehicle.

There are existing articles from notable brake suppliers like Stoptech on this issue.

11-07-2016, 12:13 PM	#1
audi1199r New Member 1 Rep 6 Posts Drives: 2011 x5 35D Join Date: Oct 2016 Location: Aldie, VA iTrader: (0)	Help: installing x5m retrofit big brake kit I was told by the dealer that the entire rear axle and hub have to come apart to install the rear portion of the x5m big brake kit on my 2011 x5 35D does anyone have any tips on how to change the rear heat shields without removing the hubs? any help would be appreciated https://www.ecstuning.com/b-genuine-...t/34112348054/
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11-08-2016, 02:04 PM	#2
Maranello055 Private 16 Rep 67 Posts Drives: 2015 BMW X5M Join Date: Dec 2015 Location: Pittsburgh iTrader: (1)	This looks like it is for the F15 judging by the link and Product details. __________________ 2015 X5M
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11-09-2016, 02:34 PM	#4
-c- Colonel 886 Rep 2,736 Posts Drives: bmw Join Date: May 2010 Location: Chicago iTrader: (5)	Lol dealers are so funny! The rear calipers have special hangers that move them further out in order to fit the new larger rotor, the calipers are exactly the same caliper as the standard X5. As far as the rear rotors the x5M and the f15M are swappable directly but as far as the standard X5 parking brake setup I'm not sure if it is different between the two. I've heard the hub has a different diameter between the two M and non M so that's where the big changes may be.
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11-09-2016, 03:42 PM	#5
smyles Major 1023 Rep 1,168 Posts Drives: '21 X5 Join Date: Jan 2012 Location: DC iTrader: (0)	Is it even worth the effort installing rear M brakes? Aside from being blue, what are the benefits given the installation hassles and pricier replacements down the road? Fronts are a different story, obviously.
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11-09-2016, 05:39 PM	#6
Ryan5034 First Lieutenant 83 Rep 360 Posts Drives: 2019 X5 50i Join Date: Jun 2016 Location: Fargo, ND iTrader: (1) Garage List 2019 BMW X5 xdrive50 [0.00] [0.00] 2011 BMW X5 xdrive 50 [0.00] 1964 Chevrolet Bel-Air [0.00]	Especially if the calipers are the same.
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11-10-2016, 06:12 AM	#7
Qarban Private First Class 26 Rep 116 Posts Drives: E70 X5 and E70 X5M Join Date: Dec 2015 Location: Texas iTrader: (0)	And for the price of the E70 and F85 they should have come out with rear big calipers too like the Cayenne gts/turbo
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11-10-2016, 06:26 AM	#8
UnicornM Lieutenant 387 Rep 519 Posts Drives: M Join Date: Jan 2014 Location: UK iTrader: (2)	As said above, carrier is different on the rear (caliper is same) and you'll need new hub since the center bore is 72.5mm vs 74.1mm on non M vehicles. I'd check RealOem on the internal brake setup but I think you'll be OK on that. I guess you could get the rear disc bored out to 74.1mm if the internals of the handbrake/shoes are same.
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11-12-2016, 10:23 AM	#9
blue dragon Lieutenant Colonel 1190 Rep 1,544 Posts Drives: '22 Tesla MY + '23 Tesla MY Join Date: Jul 2010 Location: Land of high taxes and crappy healthcare iTrader: (2)	I was going to say the rear hub size is different, so how are you going to use the X5M rotors without changing the hub (and getting centering rings for your wheels) __________________ \| '22 Tesla Model Y P - My daily \| '23 Tesla Model Y LR - Wife's daily \| '17 F15 35D - missed daily \|
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11-12-2016, 01:36 PM	#10
UnicornM Lieutenant 387 Rep 519 Posts Drives: M Join Date: Jan 2014 Location: UK iTrader: (2)	Bore them out. The hats are ally. Machine shop can easily remove the 1.6mm difference.
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11-13-2016, 09:10 AM	#11
socale39 Major 209 Rep 1,044 Posts Drives: 04 545i SMG Join Date: Jan 2011 Location: California iTrader: (0)	All that work for rear brakes that are going to do very little work and look like standard calipers. I get doing the fronts but honestly I think it's a waste of time and money for the rears.
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11-14-2016, 09:38 AM	#14
Cattivo FDNY Engine 55 681 Rep 2,115 Posts Drives: X5M, X5 50i Msport, EscaHoe Join Date: Jul 2014 Location: The Concrete Jungle iTrader: (1)	It's worth it IMHO, not only do they look better than the OE rotors... I have noticed an significant improvement in stopping since swapping over to the F85 rotors Attached Images __________________ FDNY ENGINE 55...Liberalism: Find a Cure...http://www.xbimmers.com/forums/showthread.php?t=1127923
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11-26-2016, 09:09 PM	#16
jandref321 Captain 345 Rep 728 Posts Drives: 2012 X5M Join Date: May 2014 Location: United States iTrader: (1)	I would talk to ECS about the fitment issue...even the F15 X5 has a 74.1mm rear bore but the kit says that it fits those vehicles and it's all inclusive.
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11-27-2016, 05:18 PM	#17
godmans First Lieutenant 17 Rep 310 Posts Drives: 135i / 335i / X6M Join Date: Mar 2012 Location: 6ix iTrader: (6)	If it were me, I would either go with an aftermarket BBK that is engineered to complement the stock X5 35i rear, OR go with the full X5M front and rear. Rationale is that if you only go with the X5M front, you would likely have a front brake bias, where you are triggering the front ABS prematurely and thereby compromising the overall braking performance of the vehicle. There are existing articles from notable brake suppliers like Stoptech on this issue.
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