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E85 / E86 Z4 (2003-2008)
E85 Z4 convertible and E86 Z4 coupe talk with our BMW gurus here.

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  #1  
Old 12-06-2012, 07:01 AM
Trapper Trapper is offline
I'd rather by driving
Location: Sudbury
 
Join Date: Jun 2012
Posts: 78
Mein Auto: 2003 Z4 2.5 Titanium Silv
Found out why passanger seat won't tilt

Hi fellow Zer's

I bought my first BMW this year in June and one of the issues that came with the car was the passenger seat tilt not working and was stuck in the “gangsta” position. I am planning on some road trips next year and my wife is reluctant to go unless “that dam seat is fixed”.

I searched the forum without much luck finding why my passenger seat won't tilt. I hear the motor run when I push the button but nothing moves. I have the car put away for the winter and in the process of changing a few parts on it and decided to trouble shoot the seat tilt issue.

I ended up figuring out the issue was in the gear box as the motor works and the drive shaft between the motor and the gearbox was in good shape. As you can see from the picture the bull gear has a groove cut into it and the matching pinion is also worn. Likely the previous owner had someone push the tilt button when the seat back was hitting up against the back of the car. Orrrrr he was trying to recline it too far to get a piece of tail...

I measured the gears and counted the number of teeth then contacted Odometer Gears. They got back to me the same day and told me they don’t make those gears. I ended up buying part # 52107111878 http://www.realoem.com/bmw/showparts...71&hg=52&fg=10 from Get The BMW parts guys. They had the part in stock for $155.

I should be getting the part by next weekend to reinstall and get the seat back into the car.
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  #2  
Old 12-06-2012, 04:46 PM
jafxdwg jafxdwg is offline
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Location: Whitby Ontario Canada
 
Join Date: Oct 2011
Posts: 46
Mein Auto: 2008 Z4 si
[QUOTE=Trapper;7234165]Hi fellow Zer's
my wife is reluctant to go unless “that dam seat is fixed”.

The previous owner was trying to recline it too far to get a piece of tail...

mmmm.....
Maybe your wife is fearful you might get some ideas from the previous owner ...
Not what you are thinking ...
It's been a while since I was brave enough ...
or more accurately ..
limber enough ..
But the Zed isn't my first choice ..
Kinda cramped surroundings ...

Best of luck with your winter repair ..
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  #3  
Old 06-14-2014, 06:19 PM
kay.one kay.one is offline
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Location: Vancouver
 
Join Date: Jun 2014
Posts: 3
Mein Auto: 2007 Z4 3.0si
I think I have the exact same issue, Did the part you ordered have all the pieces you needed, I've been reading that you need the full rail assembly which costs around $800?

Also did you order #1 or #4?

I would really appreciate your help.
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  #4  
Old 06-14-2014, 06:27 PM
kay.one kay.one is offline
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Location: Vancouver
 
Join Date: Jun 2014
Posts: 3
Mein Auto: 2007 Z4 3.0si
Also would you mind shareing where you got yours? the cheapest I can find is $260 USD

https://www.ecstuning.com/BMW-E46-M3-S54_3.2L/ES138267/
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  #5  
Old 06-16-2014, 06:21 AM
Trapper Trapper is offline
I'd rather by driving
Location: Sudbury
 
Join Date: Jun 2012
Posts: 78
Mein Auto: 2003 Z4 2.5 Titanium Silv
I ordered part #4 from Get the BMW parts. It cost me $155 I think that included shipping to canada.

http://www.getbmwparts.com/parts/200...iagram=1918405


When I took my seat apart (make sure you disconnect the battery first or you will trip an airbag code) and removed the part I realized the part that they sent me was slightly different from the one I took out. I don't remmeber what exactily was different all I know is I couldn't install the new part. Also since I live in Canada and shipping takes longer for anything to arrive I missed the return by date to exchange the part.

So I took a chance that the internal parts of the gear drive would be the same as the one that was broken and they were. I removed the new bull gear and it was an exact match on the one I had with the broken teeth. So I installed the new bull and pinion gear, packed in new lithium grease and it has worked like new ever since.

I did search different plastic gear suppliers without any luck in sourseing the gear. You may want to see if you can get the part from a wrecking or salvage yard and do the same rather than buying a new unit.
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  #6  
Old 06-16-2014, 08:39 AM
kay.one kay.one is offline
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Location: Vancouver
 
Join Date: Jun 2014
Posts: 3
Mein Auto: 2007 Z4 3.0si
I'm a bit confused, did the part you ordered look like

http://www.ecstuning.com/BMW-E46-M3-S54_3.2L/ES138267/

or

http://www.ecstuning.com/Search/52107112656/ES228004/
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  #7  
Old 06-16-2014, 09:03 AM
Trapper Trapper is offline
I'd rather by driving
Location: Sudbury
 
Join Date: Jun 2012
Posts: 78
Mein Auto: 2003 Z4 2.5 Titanium Silv
The part I ordered looked like the first one (ES138267) the plastic gears are in the black housing between the motor and the frame.
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