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BMW 3-Series (E90 E92) Forum > BMW E90/E92/E93 3-series General Forums > General E90 Sedan / E91 Wagon / E92 Coupe / E93 Cabrio > Steptronic trans will not downshift in Manual



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      01-18-2010, 11:31 PM   #1
Matt Cutchin
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Steptronic trans will not downshift in Manual

I have a 2006 325i. When I switch it into SM and try to downshift it won't. It WILL shift up but never down regardless of current gear. Any ideas?

Thanks
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      01-18-2010, 11:48 PM   #2
nyc3r
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Try doing at low speed. Computer will limit downshift based on speed but you should be able to downshift from any gear. if not, could just be a bad connection on the shift controller by your shift boot.
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      01-19-2010, 12:20 AM   #3
Matt Cutchin
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Yes it won't downshift at any speed when I tell it to. What kind of connection is there? Is it something I can replace or repair? and how much?
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      01-19-2010, 01:10 AM   #4
JayKay335i
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Sounds like a bad connection. Not sure exactly how the wires are connected to the shift knob or what the mechanism is for switching gears with it.
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      01-19-2010, 01:40 AM   #5
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Maybe TSB B 24 13 07?

"Various complaints associated with inoperative transmission controls."

Example:
Transmission Connector X8500, pin 14 is slightly pushed back causing a poor connection.


http://www.bmwtis.com/tsb/bulletins/...p/b241307g.htm
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      01-19-2010, 09:11 AM   #6
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take it in
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      09-16-2015, 01:32 PM   #7
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Did you ever figure out this problem?

Im having the same thing.
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      09-16-2015, 02:03 PM   #8
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If you use DS or M modes often, wires attached to the shifter stress and break. See this thread for a video that explains what to look for and how to fix it:
http://www.e90post.com/forums/showthread.php?t=842645
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      09-16-2015, 02:18 PM   #9
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Quote:
Originally Posted by Squark View Post
If you use DS or M modes often, wires attached to the shifter stress and break. See this thread for a video that explains what to look for and how to fix it:
http://www.e90post.com/forums/showthread.php?t=842645
^^^
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