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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: 24
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)
 
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Posts: 36
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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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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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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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
 
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Mein Auto: 05 Z4 3.0i smg, 01 530ia
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
 
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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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Mein Auto: 05 Z4 3.0i smg, 01 530ia
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
 
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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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Mein Auto: 05 Z4 3.0i smg, 01 530ia
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
 
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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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  #12  
Old 10-26-2015, 04:03 PM
vitasg vitasg is offline
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Mein Auto: x3, z4, 528i
Hi guys.....I have recently encountered the exact same symptoms on my 2003 z4. Not being able to shift normally, stuck in neutral, shut car off for a while and all seems fine again only to reoccur......can someone who has had this issue with their z please let me know the part number for the smg relay and where I can order one? Checked out parts geek and they have every possible relay for all bmw's except z4's.....thanks
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  #13  
Old 10-26-2015, 04:36 PM
Dyounge Dyounge is offline
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Location: Atlanta
 
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Mein Auto: 2003 Z4 3.0i SMG
Hope this helps....

Vitasg,

I never updated this thread after getting the car fixed. Ended up needing new clutches and re-programming. I replaced the pump...no go. I replaced the relay...no go. The guy had it for almost 2 weeks but finally got it straightened out. Cost me @ $1,800 when all done. I agree that the relay should be the FIRST thing you rule out. Be careful though as the orange relay for your car (assuming 3.0) "looks" the same as the relay for the M engine. Make sure you don't get the wrong one as I understand using that one can cause MORE damage to your car. It was not easy for the counter parts guy to find me the correct one. I bought the relay from dealership because I was out of town with it at the time. Still only cost like $34 I think. Hope that is the extent of your problem because if not, this issue will not simply go away. It will get worse and become unreliable and a pain in the ass! Let me know if you have additional questions.
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  #14  
Old 10-26-2015, 05:40 PM
vitasg vitasg is offline
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Mein Auto: x3, z4, 528i
Cheers Dyounge

Dyounge, thanks for the quick reply. Much appreciated.......gona try'n get a hold of this relay and see what happens. I'm holding my breath man.....just going through a major repair on my 2005 x3 (warped cylinder heads) which is running into the $ 6-7000 range.
Thanks again.
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  #15  
Old 10-26-2015, 05:57 PM
Dyounge Dyounge is offline
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Location: Atlanta
 
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Mein Auto: 2003 Z4 3.0i SMG
Have to admit that's a lot worse. Good luck!
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  #16  
Old 10-27-2015, 10:40 AM
joelselman joelselman is offline
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Mein Auto: 05 Z4 3.0i smg, 01 530ia
Not likely to be a relay but maybe you're lucky. Any repair shop with the proper equipment and knowledge to repair these cars can check the pump output pressures and it's obvious.
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  #17  
Old 10-27-2015, 04:23 PM
vitasg vitasg is offline
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Location: Ottawa, Canada
 
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Mein Auto: x3, z4, 528i
Hey Joel.....thanks for the response. Just hoping Lady luck is looking down on me on this one and its just the relay. I'm kind of expecting a major repair. Quick question for you.......when these symptoms occur in a Z4, in your experience, is it usually just the pump that needs repair or is it the whole unit (pump and accumulator)?? The pump is a reasonable price but whole unit is several thousands of dollars......just a bit concerned.
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  #18  
Old 10-28-2015, 09:26 AM
joelselman joelselman is offline
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Mein Auto: 05 Z4 3.0i smg, 01 530ia
See post #6 in this thread. All I can say is mine has worked fine for 5+ years with a pump only. A shop with the proper equipment should be able to diagnose but they may prefer to sell you everything.
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