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E85 / E86 Z4 (2003-2008)
E85 Z4 Roadster, E86 Z4 Coupe, E85 Z4 M Roadster, and E86 Z4 M Coupe talk with our BMW gurus here.

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  #1  
Old 03-17-2014, 12:26 PM
Dyounge Dyounge is offline
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Location: Atlanta
 
Join Date: May 2011
Posts: 20
Mein Auto: 2003 Z4 3.0i SMG
Talking SMG Trans filter?

Hey Guys,

Has anyone had any luck or, is it worth looking in to having the transmission filter replaced on my 2003 3.0 SMG? Car has 80,000 mi. I have seen other posts regarding SMG solutions and they seem to center around replacing entire assembly. My issue is intermittent but seems to be becoming more frequent. The idea of perhaps a $6,000 on a $9,000 car makes me ill. Any input/alternatives are GREATLY appreciated.
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  #2  
Old 03-17-2014, 03:09 PM
jcutrell jcutrell is offline
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Location: Georgetown, Ohio (USA)
 
Join Date: Jun 2009
Posts: 26
Mein Auto: 2003 BMW Z4
No suggestions for you but I will be following this thread with interest. I have a 2003 2.5 SMG with about 80,000 mi. No issues yet.

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  #3  
Old 03-17-2014, 04:22 PM
kalali kalali is offline
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Location: New Jersey
 
Join Date: Dec 2011
Posts: 317
Mein Auto: 2003 Z4 2.5
You have no mention of your issue....And what is that reference to $6000? Cost of the transmission or what? Missing some words in your post...
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  #4  
Old 03-17-2014, 05:59 PM
Dyounge Dyounge is offline
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Location: Atlanta
 
Join Date: May 2011
Posts: 20
Mein Auto: 2003 Z4 3.0i SMG
SMG issue explained.

Sorry for not explaining the issue before. A little like wearing headphones I guess. I know whats playing in my head but nobody else does.

Occasionally the SMG will not shift. If it is parked it will not engage any gear from it's neutral position. I have learned from previous incidents to no longer leave it in gear when shutting it off as it may be stuck that way too. While underway sometimes it will not upshift. May get to 3rd but no further. I also have noticed as documented in other posts that I don't here the robotic buzz of the hydraulic pump making noise all the time like it used to. It still does occasionally but not nearly as much as it used to. When trying to get it "unstuck" I will turn ignition off and on and move the shifter around....when all else fails I leave it alone for a few minutes and it has resolved itself. I rarely get the dreaded F code on the gear indicator but, do get the "beep" and subsequent dash light letting me know I have an issue with the tranny.

All that being said it is totally random when it will occur. Colder weather appears to have some affect but I am not sure. I was thinking that if it were a pump failure or something worse would't it just ALWAYS be broken? In terms of the cost I have seen others report replacing the pump and or something else being VERY expensive! Btw I have already replaced the orange relay. Hope someone can help.
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  #5  
Old 03-18-2014, 04:09 AM
Mikey48 Mikey48 is offline
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Location: Charleston,S.C.
 
Join Date: Mar 2011
Posts: 414
Mein Auto: BMW Z4 3.0
Hi, It sounds like your Hydro Pump is going bad. Mine did the same thing. I had a 2004 Z4 3.0i with the SMG transmission. If you already replaced the relay the next step is the Hydro Pump. Mine had to be ordered from Germany and my car was down for a week. It cost around $875.00 part . Good luck.
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  #6  
Old 03-18-2014, 12:59 PM
joelselman joelselman is offline
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Location: lake havasu city, az
 
Join Date: Aug 2013
Posts: 67
Mein Auto: 05 Z4 3.0, 01 530
Same symptoms on mine a few years back. The computer diagnosis will say there's a problem with the entire shift system but if you check the hydraulic pump pressures they will be low. Inde tried to sell me $4500 repair,; I put the pump in myself after buying the computer...$1300 for computer, $400 for parts.
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  #7  
Old 03-21-2014, 08:39 AM
Dyounge Dyounge is offline
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Location: Atlanta
 
Join Date: May 2011
Posts: 20
Mein Auto: 2003 Z4 3.0i SMG
Sigh...

Thanks guys. I guess there is no other way out of this.
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  #8  
Old 03-22-2014, 02:06 PM
joelselman joelselman is offline
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Location: lake havasu city, az
 
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Posts: 67
Mein Auto: 05 Z4 3.0, 01 530
Why so negative? We just told you you could probably get it fixed for about $1k instead of the $6k you were thinking.
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  #9  
Old 03-23-2014, 01:38 PM
Dyounge Dyounge is offline
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Location: Atlanta
 
Join Date: May 2011
Posts: 20
Mein Auto: 2003 Z4 3.0i SMG
I thought I heard somewhere that someone had resolved this problem by having the transmission fluid and filter changed. I'm not negative just not happy to spend even $1,000 if I don't have to.
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  #10  
Old 03-23-2014, 01:57 PM
joelselman joelselman is offline
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Location: lake havasu city, az
 
Join Date: Aug 2013
Posts: 67
Mein Auto: 05 Z4 3.0, 01 530
Actually, I'm not even aware of any filters. The transmission is a basic 6-speed manual trans which has a system of electro-hydraulic actuators that manually shift the gears in response to your or the computer's input. The trans has it's own normal gear oil and the shift system has it's own separate hydraulic oil system with an electric pump. Assuming you haven't lost any hydraulic fluid, the pump (your symptoms are classic) is bad. Actual pump pressures can easily be checked with the BMW DIS computer.
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  #11  
Old 03-25-2014, 12:03 PM
Dyounge Dyounge is offline
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Location: Atlanta
 
Join Date: May 2011
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Mein Auto: 2003 Z4 3.0i SMG
Thanks Joel

Got a quote from my local guy today of $1,100 installed. He thought it sounded like the pump too but wants to rule out other factors before just swapping it out. Will update when completed. Now where's that $1K I had just laying around...it was here a minute ago!
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