2009 BMW Z4 Hardtop Issues
- Thread starter Admend
- Start date
Attleborough, Norfolk
So... I went the the BMW dealer and they were telling me that my JBE Module failed which is causing the roof and windows to stop working. I do not believe this to be true because I did not recieve an error code on this. I will be checking the codes again tonight to see if I see one and if they messed around. ALSO, while driving the back glass popped off and when I pressed to the button to drop the convertible top, the glass unlatched and lifted. The top portion remains on top of the windshield and is still locked in.
So the dealer was saying that the JBE module was to blame for the windows and convertible top not working. I don't agree with them because when I checked for fault codes, none came up for the JBE module. While driving the back windshield popped out on one side. When i got home i clicked to open the top convertible and the other side also unlatched and lifted a little. It then stopped leaving only the back window up. When i pressed the bottom to close the convertible the back windshield didnt drop. It only went back down when i turned off the car. The top portion of the roof didnt budge in either instance. Im unsure what to do next. I will check for codes again tomorrow.
tintoverano
Active member
Admend said:
that seems to be ok - once the hydraulic pressure is gone, there's nothing to hold the roof structure and it goes where its weight takes it
Do you guys think the JBE module might be the cause of all of this? At this point, that's all I have to work on. I received no other error codes from my reader and when I tried to operate the windows from the JBE module they didn't work but I could manually operate them through the footwell module.
tintoverano
Active member
RobbiZ4 said:
there are sections which are suggested to be greased in case of noise https://www.newtis.info/tisv2/a/en/...ble-hardtop-noise/locking-hook-rolls/B2bbnBK8
tintoverano
Active member
further space buffers to check https://www.newtis.info/tisv2/a/en/...oise/spacer-buffer-linkage-exit-flap/AfOdA5S6
I had the roof up on my 35i yesterday, I went over it very closely and no sign of any red coloured lubricant at all! The problem with my 23i as I mentioned earlier was rust in a couple of pivots, rust being brown/light brown and leaving run marks on the steel as rust does.RobbiZ4 said:
I have been trawling google trying to find any info on roof lubricants/red grease but cannot find anything!
Do you have any references to this or a part number??
What we are seeing is the brass/bronze washing out. It says can be lubricated. I have done so with clean engine oil with a syringe, not had any movement problems in 7 years.
One assumes the roof mechanism is forged or cast aluminium, so some kind of bush is required.
i have also silicone sprayed all the wires and pipe work, just in case of any rubbing.
One assumes the roof mechanism is forged or cast aluminium, so some kind of bush is required.
i have also silicone sprayed all the wires and pipe work, just in case of any rubbing.
If the failure of the microswitch was a mechanical failure, I can see how it could get worse over time.enzed4 said:
Just waiting to hear back from the OP who is taking his Zed for some diagnostics, until then we're just having fun spitballing possibilities
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Hey, so I ordered the new JBE module and waiting for it to come in. But i see here that u said u tracked down the problem to a specific microswitch. Did a code appear up for this switch or did u just find it by taking apart everything?
RobbiZ4 said:
I checked the wiring on the left and right side where the mechanism folds (higher possibility of broken wires) and there was no evidence of kinks or damage to any of the wiring. They are perfectly straight with 0 corrosion on them. The JBE module comes in today. Ill have it coded and let u guys know if it reveals anything.