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      02-04-2011, 03:58 PM   #1
BimmerGuyFL
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F10 M5 steering system EPAS or Hydraulic?

So with the new F10 having swtiched over on the RWD models to Electric Assist power steering, does any one know if the new M5 will have EPAS also or still keep the traditional Hydralic Power steering system? the F10 xDrive models still have Hydraulic steering so I am keeping faith that is the case also with the F10 M5.

Any news on this?

Scott26, can you give us any clue on this?

Thanks
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      03-02-2011, 11:56 AM   #2
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      03-05-2011, 07:42 AM   #3
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Autocar quoted the head of development from BMW M division, Albert Biermann, saying that the new M5 would have a 3rd generation of fully electric power steering.

Quote:
The M5 will also get new, fully electric power steering, described by Biermann as a third-generation system that offers similar levels of response and feedback to today’s hydraulic set-up.
Source: Autocar: BMW M5 - new spy pics
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      04-08-2011, 07:39 PM   #4
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Quote:
Originally Posted by TonyMeister View Post
Autocar quoted the head of development from BMW M division, Albert Biermann, saying that the new M5 would have a 3rd generation of fully electric power steering.



Source: Autocar: BMW M5 - new spy pics
You have got to be kidding me? The first M5 to have Electric power steering? OMG this better have excellent feedback and non artificial feel and response to it.
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      12-26-2013, 05:41 AM   #5
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Wait? I have a new 2014 BMW M5. is my steering wheel operated electrically or hydraulic ?
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      12-26-2013, 05:59 AM   #6
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Quote:
Originally Posted by TonyMeister
Autocar quoted the head of development from BMW M division, Albert Biermann, saying that the new M5 would have a 3rd generation of fully electric power steering.

Quote:
The M5 will also get new, fully electric power steering, described by Biermann as a third-generation system that offers similar levels of response and feedback to todays hydraulic set-up.
Source: Autocar: BMW M5 - new spy pics
The article you are quoting is several years old and refers to the current f10 M5. Spy pics of the next gen M5 are still a while away let alone mechanical specs.
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      12-26-2013, 09:14 AM   #7
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Quote:
Originally Posted by dr.skp.ortho
Quote:
Originally Posted by TonyMeister
Autocar quoted the head of development from BMW M division, Albert Biermann, saying that the new M5 would have a 3rd generation of fully electric power steering.

Quote:
The M5 will also get new, fully electric power steering, described by Biermann as a third-generation system that offers similar levels of response and feedback to todays hydraulic set-up.
Source: Autocar: BMW M5 - new spy pics
The article you are quoting is several years old and refers to the current f10 M5. Spy pics of the next gen M5 are still a while away let alone mechanical specs.
Dude, the article that guy is citing is several years old because this entire thread is several years old.
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      12-26-2013, 11:52 AM   #8
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To answer NSA's question, the F10 M5 has hydraulic steering.
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      12-28-2013, 05:09 AM   #9
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Quote:
Originally Posted by hinckley View Post
To answer NSA's question, the F10 M5 has hydraulic steering.
awesome thank you. I wonder how they control to have the wheel comfort, sport and sport plus modes.
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      02-11-2014, 03:34 PM   #10
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Quote:
Originally Posted by N.S.A View Post
awesome thank you. I wonder how they control to have the wheel comfort, sport and sport plus modes.
It is called servotronic.
Invented many years ago (I recon in the E32 7 series).
It regulates the pressure of oil sent to the steering rack.
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      02-11-2014, 04:02 PM   #11
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Quote:
Originally Posted by clubcsl View Post
It is called servotronic.
Invented many years ago (I recon in the E32 7 series).
It regulates the pressure of oil sent to the steering rack.
Long as this zombie thread is back anyways, I've wondered for a bit - do the the difference steering settings - comfort/sport/plus - alter the steering ratio as well as the effort, or just the effort?

I haven't been able to discern a difference in ratio while changing through them.
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      02-11-2014, 04:08 PM   #12
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Quote:
Originally Posted by clubcsl View Post
It is called servotronic.
Invented many years ago (I recon in the E32 7 series).
It regulates the pressure of oil sent to the steering rack.
oh wow so the stiffer it is the less oil sent to the steering rack or the opposite of that?
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      02-12-2014, 04:17 PM   #13
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Quote:
Originally Posted by dhirm5 View Post
Long as this zombie thread is back anyways, I've wondered for a bit - do the the difference steering settings - comfort/sport/plus - alter the steering ratio as well as the effort, or just the effort?

I haven't been able to discern a difference in ratio while changing through them.
No change in the ratio.
Just how assisted the rack is.
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      02-12-2014, 04:18 PM   #14
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Quote:
Originally Posted by N.S.A View Post
oh wow so the stiffer it is the less oil sent to the steering rack or the opposite of that?
I would say lower pressure of the oil that is sent.
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      02-12-2014, 06:17 PM   #15
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Quote:
Originally Posted by clubcsl View Post
I would say lower pressure of the oil that is sent.
alright cool makes sense, thank you
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      02-12-2014, 06:44 PM   #16
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Good read. I know how most of the components work, but never knew exactly how the M5's servotronic operates.
Would of never guessed that the firmness of the steering was adjusted electronically by altering the oil pressure.

I would guess that comfort has the highest oil pressure and sport plus has the least oil pressure. I would think that because if the system is off (no oil pressure), then turning the wheel is like having no power steering.

Is servotronic separate from power steering?
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      02-12-2014, 07:17 PM   #17
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This guys blog better explains the engineering of the F10 M5 than anything else I have read... here is his page on the steering: http://m5carblog.blogspot.com/2013/02/steering.html
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