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E90/E91/E92/E93 (2006 - 2013)
The E9X is the 4th evolution of the BMW 3 series including a highly tuned twin turbo 335i variant pushing out 300hp and 300 ft. lbs. of torque. BMW continues to show that it sets the bar for true driving performance! -- View the E9X Wiki

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  #1  
Old 10-18-2011, 10:04 PM
3Coupe4me 3Coupe4me is offline
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Mein Auto: 328i Coupe
Replaced my DSC Hydro Pump

Sometime ago I got the dreaded ABS, Brake and DSC trifecta error while coming home from work but it went off after I restarted the car.



This intermittent fault continued on and off for some time afterwards until about a month ago it finally stayed permanently on. I decided to take the car to an indy mechanic and have the codes read. The fault cade came back as a "5DF0" code which is a faulty DSC Hydrolic Pump. The estimated cost of repair was $530 for the pump + 4 hours labor to fix it.

Having worked on all the cars I've ever owned I decided to tackle the pump replacement myself. I ordered the part from Tischer for about $100 less than the dealer and with a free weekend coming up I decided to do the job myself. The part that I was most worried about was bleeding the ABS pump which requires special software at the dealer to cycle the pump as part of the bleeding process. However I did some research and saw where you can cycle the pump using the old school method of stomping on the bakes on a slippery surface while driving at a slow speed. Well, I had such a surface on my nearly 100ft long gravel driveway which would affect nobody but myself if I somehow screwed up on bleeding the brakes correctly.

When the part arrived I was actually pleasantly surprised that it had installation instructions included from the manufacturer. Even though it should have been just a simple swap of the parts the instructions showed how to relieve the pressure from the brake lines and how to prevent the lines from loosing but a little fluid. Another surprise was that during the installation of the new pump I discovered that it was already bench bled from the factory and already had fluid in it.

In total it took only about 10 minutes to do the swap. The hardest part was bleeding the four wheels until the brakes were firm then activating the ABS using the method described above and then bleeding all four wheels again until the entire brake system was flushed with new fluid.

Here are some pics and a description of the steps

ABS PUMP LOCATED HERE


CLOSE-UP VIEW OF PUMP WITH THE INTAKE AN OUT BRAKE LINES REMOVED


PUMP REMOVED AND LINE CAPPED TO PREVENT FLUID LOSS


THE CAPS I USED


PUMP ASSEMBLY WITH CONTROL UNIT ATTACHED


OLD AND NEW UNIT SIDE BY SIDE



PREPARATION FOR PUMP SWAP.

I swapped just the pump and kept the control unit because it is already programmed for the car. If I had put in the new one i would have had to take it to the dealer for programming.






After all that work it was good to see this


I also tested the DSC, Start off Assist and Cruise Control and everything is now fully functional.
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  #2  
Old 10-19-2011, 07:27 AM
90rr 90rr is offline
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good job !
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  #3  
Old 10-19-2011, 10:54 AM
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Pat_X5 Pat_X5 is offline
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Wow! Amazing because I thought something like a hydraulic unit would need an experienced indy or dealer.
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  #4  
Old 10-19-2011, 12:18 PM
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invariant invariant is offline
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Neat! Bookmarked/subscribed
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  #5  
Old 10-19-2011, 01:01 PM
B-737 B-737 is offline
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did you use, or could have used a Motive Pressure Bleeder?
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  #6  
Old 10-19-2011, 01:05 PM
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Orient330iNYC Orient330iNYC is offline
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Quote:
Originally Posted by B-737 View Post
did you use, or could have used a Motive Pressure Bleeder?
pressure bleeder wont purge bubbles in the dsc unit.
if you have a bmw specific scan tool, you can get the dsc pump to cycle during a bleed to purge the dsc unit as well (or do the abs actuation method to force fluid to cycle through)
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  #7  
Old 10-19-2011, 01:19 PM
Clifton Clifton is offline
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Nice work! Thanks for the post!!!
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  #8  
Old 10-19-2011, 01:19 PM
BMWFTW91 BMWFTW91 is offline
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Amazing! Nice job man!!
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  #9  
Old 10-19-2011, 01:31 PM
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bmw_n00b13 bmw_n00b13 is offline
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You need a pressure bleeder in conjunction with DIS to purge the unit. Simple to do.
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  #10  
Old 10-19-2011, 03:43 PM
3Coupe4me 3Coupe4me is offline
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Quote:
Originally Posted by B-737 View Post
did you use, or could have used a Motive Pressure Bleeder?
I did the two person method to bleed the brakes. Orient330iNYC is right, the ABS pump has to be cycled and the brakes bled again to remove all the air in the brake lines. What I will invest in is a Bavarian Tech Tool for stuff like this.
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Old 10-19-2011, 03:47 PM
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rtgirard rtgirard is offline
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Great work!
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  #12  
Old 05-29-2013, 11:49 PM
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SilverX3 SilverX3 is offline
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Mine played up... I have to order a new coltrol unit... the pump was OK I was told by dealer

$2000 AUD for the control unit.... ouch
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  #13  
Old 05-30-2013, 06:49 AM
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DSXMachina DSXMachina is offline
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Quote:
Originally Posted by SilverX3 View Post
Mine played up... I have to order a new coltrol unit... the pump was OK I was told by dealer

$2000 AUD for the control unit.... ouch
I realize this is a Zombie thread, but since it's back...
The control unit is attached to the pump and when you buy a rebuild it usually comes as an assembly.
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  #14  
Old 08-19-2013, 01:53 PM
warren8959 warren8959 is offline
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FYI. I got the 5DF1 and 5DF0 fault codes on my 2008 328I. When searching for a rebuilder I found that some hydraulic units and electronic modules can not be rebuilt. After looking further I found a rebuilder in England who said they could rebuild my Teves Mk61 unit. I sent it to them and for $300.00 plus shipping I got it back, installed it and cleared the fault codes with my BT tool and all the fault lights went out on my instrument panel. FYI: www.ecutesting.com I'm happy.

Last edited by warren8959; 08-20-2013 at 08:08 AM.
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  #15  
Old 08-19-2013, 03:38 PM
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great work

thanks for sharing
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