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E85 / E86 Z4 (2003-2008)
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  #1  
Old 05-05-2019, 08:25 AM
Bob Stech Bob Stech is offline
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Mein Auto: BMW Z4 2006
Top problem

My top fully retracts, but motor doesn't cycle off, dash light blinks red. Trunk knobs fully retracted. Help
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  #2  
Old 05-05-2019, 06:34 PM
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dc_wright dc_wright is offline
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Mein Auto: '06 Z4 3.0si, '11 128CiC
There are two sensors mounted on the left side hydraulic lift cylinder. One senses the top up and the other top down.
Either there's something jamming the top and it's not really fully down, or the other possibility is the sensor has failed.
What year is your E85?
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Old 05-05-2019, 09:12 PM
Andyz4 Andyz4 is offline
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Mein Auto: 2006 Z4 3.0si
Will the top go back up with the switch?
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Old 05-06-2019, 06:39 AM
Bob Stech Bob Stech is offline
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Thanks I'll have a look at the sensors. Top works fine going up. Motor sounds fine. My car is a 2006 3.0 Si
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Old 05-07-2019, 07:42 PM
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dc_wright dc_wright is offline
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Mein Auto: '06 Z4 3.0si, '11 128CiC
On the inside of the top frame, just above the lift cylinders there's a plastic shield on each side of the car. Their purpose is to keep the top/head liner from getting pinched in the top frame when it folds. These have been known to break loose due to age, and either the plastic piece gets caught in the top frame or the head liner does. In either case the top won't fold down to the final correct resting place and you'll have the flashing incomplete cycle LED. Put the top about half way down to remove the tension on the head liner and look behind it to see if the plastic pieces are in place.

https://z4-forum.com/forum/viewtopic.php?t=50000
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Last edited by dc_wright; 05-07-2019 at 07:47 PM.
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Old 05-09-2019, 08:34 AM
Bob Stech Bob Stech is offline
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DC_Wright Thanks for your help. My top doesn't have the plastic side pieces, in fact there are no mounting points for them. Maybe my car was manufactured before these were added? Mfg date 03/06. In all events nothing seems caught in the headliner or top and it seems to fully retract. I live in western Colorado and nearest dealer/shop is 250 miles away. Guess I'll live with it until I make it over to Denver. Thanks again for your input.
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