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BMW Z4 Electrical Problems

32 messages,  Last post on Dec 04, 2009 at 3:20 PM

You are in the BMW Z4 Forum. Your Host is claires

What is this discussion about? BMW Z4, Coupe, Convertible


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#22 of 32
Re: Power roof [Mr_Shiftright] by steve_m
Jun 06, 2009 (11:19 am)
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Replying to: Mr_Shiftright (Jun 05, 2009 10:08 pm)

Yes, it could be either TSB. But if it was the microswitch, nothing should happen when the "top down" button is pressed.
 
If the electric/hydraulic soft top motor is bad, the windows should still go down, and the top latch should disengage. But the top won't power down any farther than that.
 
It seems like some people have been lucky recently getting BMW to cover the cost of the repair, others have been paying a little under $2000. I would imagine the better the customer you are at a dealer, the more likely you are to get the repair done for free.
 
That said, I understand BMW extended the warranty on the soft top, but my 2003 still falls outside the range, even though it only has 39,000 miles on it. And given that I like to do my own repairs, I'm not in the good customer category, and will probably tackle the repair myself.
#23 of 32
Re: Power roof [steve_m] by Mr_Shiftright HOST
Jun 06, 2009 (2:13 pm)
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Replying to: steve_m (Jun 06, 2009 11:19 am)

My experience has been that the "better" dealers, who are cosier with the factory, are sometimes given extra discretionary funds for "good will".
#24 of 32
Re: Power roof [Mr_Shiftright] by jdecola
Jul 21, 2009 (9:29 pm)
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Replying to: Mr_Shiftright (Jun 06, 2009 2:13 pm)

This is only an observation, just recently I have had this same problem of the top not opening or closing when pressing the appropriate buttons.
 
Now the interesting thing is that I am also having problems with my outside temp sensor. I keep the car outside uncovered ( I know, horrors...) and when it's been very wet and damp outside and I start the car, the temp sensor indicates -40 degrees. As the car warms up and I drive the temp rises to almost normal, and then may drop again.
 
Now mostly this is annoying, but I noticed that when the temp was in the neg range the tops wouldn't work. But when the temp went up it did.
 
While I was reading the manual on how to put the top up manually, it mentioned not operating the top if it was below -10 (or so). So other than it may be a general short in the system that is also affecting the top, couls it be a temp interlock that prevents operating the top in really cold temps to prevent cracking?
 
Sorry for being so long winded...
#25 of 32
Re: Power roof [jdecola] by Mr_Shiftright HOST
Jul 22, 2009 (7:00 am)
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Replying to: jdecola (Jul 21, 2009 9:29 pm)

I certainly wouldn't put it past the Germans to design something like that and forget to tell anyone.
#26 of 32
Re: Power Steering Shutdown in Z4 [ahva] by induscreed
Sep 11, 2009 (7:54 am)
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Replying to: ahva (Mar 03, 2008 7:05 pm)

Hi,
 
I had the same issue today coming into work. I have a 2005 Z4 and live in northerN VA. The power steering light came on abruptly thrice and shut of the electricals in the car i.e. the nav screen folded in and up suddenly. Something tells me I need to be on the lookout for a hefty bill...please advise as to how you remedied this problem and the cost (if you don't mind). Thanks!
#27 of 32
Re: Power Steering Shutdown in Z4 [induscreed] by jdecola
Sep 15, 2009 (11:08 am)
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Replying to: induscreed (Sep 11, 2009 7:54 am)

Well I'll let you know later this week, I'm bringing it in tomorrow to fix.
 
After I posted my original, I brought the car in for another problem, my fuel indicator was showing less then full on a full tank. There are two senders in the fuel tank (at least on my year) and one was bad. So they had to drop the gas tank to replace it (access ports in the trunk would have been a good design idea).
 
I think the final bill was over $1k, I don't remember the exact price (brain tries to protect itself after a traumatic incident).
 
I also had them fill the tires with Nitrogen, the car actually ran better with that (I'm not using run-flats).
#28 of 32
Re: Power Steering Shutdown in Z4 [jdecola] by induscreed
Oct 19, 2009 (7:30 am)
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Replying to: jdecola (Sep 15, 2009 11:08 am)

Just following up on the Electric Power Steering issue, was the dealer able to diagnose and advise you on the problem? If so, what was the remedy and a painful question is of course the cost to remedy......
#30 of 32
Temp gague by jdecola
Oct 19, 2009 (7:57 am)
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Sorry for getting back so late on this. The temp sensor had a loose connection. They played around with it, and it appears to be OK. Thankfully only took 1 hr labor.
 
They did verify that the top is interlocked with the temp sensor, so, below 40 degrees top won't operate.
#31 of 32
Re: Temp gague [jdecola] by kperess
Oct 26, 2009 (4:10 pm)
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Replying to: jdecola (Oct 19, 2009 7:57 am)

Wow, the Z4 has a top nanny along with speed nannies I live in the U.P. of Michigan and still have my M roadster out (about to back into the pole barn for the winter) and if it ain't raining or snowing the top is DOWN -- that's what heaters are for!
 
There is something exhilarating about driving top down in the late fall and early spring.

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