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Topic Review (Newest First)

  • 10-01-2013, 10:55 AM
    Taschneider
    Have 2005 Z4 will not startLights do not dim battery reads 12.5 voltsHear clicking starter does not do anything13,000 miles on car
  • 07-01-2013, 09:01 AM
    Unregistered

    5 years

    Quote Originally Posted by ZeattleDave2002 View Post
    Goddammit people - the thread is FIVE years old and he probably started his car by now and doesn't need any advice :/
    Mostly, having these threads be active helps those of us who experience the same problems. Like me. Today.

    My 2003 Z3 will not turn over. Dash is lit. Lights work. Past experience tells me battery or starter.

    Not sure if the lights dim when i engage the starter. This thread has me looking at the battery, battery connection, neutral safety switch, starter connection. And the key, which I did not know could cause this, but I'll try my spare just in case.

    So, ignore the complaint about the age of the forum post and keep providing possible causes, thanks.
  • 02-26-2013, 08:17 PM
    Unregistered

    brand new battery but same problem

    2003 Z4, had just replaced the battery 1.5 weeks ago, car sat for about a week, bad rain storms the past 2 days. Now car won't start, no indicator lights come on, multiple clicking heard from engine, window keeps coming down a little each time and clicking heard from door (window motor). And trunk light and top indicator lights flashing when have key in the ignition. Tried to jump and those same lights just flashed more.
  • 02-07-2013, 06:10 AM
    ZeattleDave2002
    Goddammit people - the thread is FIVE years old and he probably started his car by now and doesn't need any advice :/
  • 01-23-2013, 02:39 AM
    Unregistered

    Z4 not starting issue

    have the key tested. the dealership replaced my starter and 3 days later same issue as before, they ordered a new key because the old one was not charging anymore or rather would not stay charged long enough to hold the car data and would no longer start the car.
  • 01-21-2011, 04:25 PM
    Penguin

    Re: 04 Z4 Won't Start

    The "Magic Eye" status indicator on auto batteries only shows the condition of one of the six cells, i.e., it assumes all six cells deteriorate at the same rate. My experience is that a battery reaches the end of it's useful life as a result of one or two cells deteriorating much more than the others.

    The best test is a load test, but the easiest is to measure the terminal voltage after the vehicle has sat with the engine off overnight, and then to measure the battery voltage with the headlights on and the engine off.

    A google for "auto battery voltage test" will give details of how to interpret the results.
  • 01-21-2011, 03:31 PM
    Z-4CE

    Re: 04 Z4 Won't Start

    I had the same problem and replaced my battery, works great now! When I looked at the battery, the status indicator was green, in other words don't trust it!
    2003 3.0 Sterling gray, black leather, 6 speed manual.
    Hardtop for the winter, Sport, Convenience and Premium packages, Xenon, Hoen H11 driving lights, CDV delete, Alutec and ACS strut bars,Goodyear Eagle F1 GS-D3's.
    Dinan stage III software, High flow throttle body, High flow intake, Ram air intake duct, Free flow exhaust.
  • 12-15-2010, 07:10 PM
    Roman

    Re: 04 Z4 Won't Start

    I had a same problem an hour ago.This is what I did: I turned off my front lights and my cabin light.Then turned the ignition key and after 3-4 seconds of jumping and growling my Z4 came back to life.
  • 10-23-2010, 10:09 AM
    Penguin

    Re: 04 Z4 Won't Start

    Probably just a weak battery.
  • 10-20-2010, 09:22 PM
    mikejnichols

    Re: 04 Z4 Won't Start

    I am experiencing the same problem with my 04 Z4 and what is so amazing is it looks exactly like yours! Has anyone discovered what the problem is??
  • 06-25-2010, 02:26 PM
    Penguin

    Re: 04 Z4 Won't Start

    Try this:

    http://autorepair.about.com/od/troubleshooting/a/ts_no-start.htm

    http://www.samarins.com/diagnose/index.html
  • 06-22-2010, 04:17 PM
    Alan

    Re: 04 Z4 Won't Start

    I am having the same issue. I just paid over $4K in repair plus other staff at the BMWSF and the car still does not start.
  • 08-16-2009, 12:21 PM
    JimmyH

    Re: Rapid clicking or one click?

    Read through the posts and still could not decide if it was the battery so I wanted to post my experience.

    BMW Z4 2.5i started slow and finally would make a clicking noise. Checked the battery indicator and it was green. Lights worked fine, all indications were the battery was good but still would not crank. It would just make a clicking noise.

    Tried to jump the battery but did not turn over. Only when I turned the headlights off from automatic to off did the Z4 actually crank and start. Thinking this is strange I tried it again and yes it seems the headlights eat up too many amps to start the vehicle from a jump. Not sure why just giving the facts.

    Took the battery down for a deep core charge but was shot. Replaced the battery and everything seems to be working fine.
  • 03-11-2008, 01:17 PM
    Penguin

    Re: Rapid clicking or one click?

    " Id expect not only the lights to dim or go out, but Id expect the radio presets to be lost and the clock to be reset to 1:00 as if the battery were disconnected."

    If the voltage gets low enough for the clock to reset and the radio presets to be lost, you can be virtually assured that the starter solenoid will disengage (due to the low voltage) and you will get the rapid clicking.
  • 03-10-2008, 04:29 PM
    Sagan

    Rapid clicking or one click?

    All along I was thinking ct001 was saying he just heard one click. Upon rereading, you are right, he says he heard a clicking. The a told me one; the ing tells me more. Ill assume he meant the classic rapid clicking.

    With rapid clicking your description is very good. Rapid clicking is most often a weak battery, and its the solenoid sliding and bottoming out due to the electromagnetic force it generates. As you describe, when the voltage from a weak battery drops too low (because its momentarily being sucked up by the starter), the spring in the solenoid pulls the plunger back (overcomes the weak electromagnetic pull). That cycles and creates the clicking. That's my vision of the process.

    In that case will the lights dim? My guess would be that theyd flicker pretty noticeably. Ive experienced this several times in different cars over the years (never in my Z4) and I recall lights diming noticeably.

    But, all along I was thinking that ct001 only heard a single click. If that were due to a battery being too low, the battery would have to be much weaker than in the rapid clicking scenario. In the one click scenario (assuming the click is the relay), my understanding is that the battery is so weak, that when the key is turned, power goes to the solenoid, but there isnt even enough power to engage it. Therefore, whatever power there is, gets sucked up by the electromagnetic windings of the solenoid.

    So in the one click scenario, Id expect not only the lights to dim or go out, but Id expect the radio presets to be lost and the clock to be reset to 1:00 as if the battery were disconnected. Over the decades, Ive experienced both the rapid clicking (low battery) and the one click (mostly dead battery).
    <img src="http://members.roadfly.org/sagan/sigjq.JPG">
  • 03-08-2008, 06:18 PM
    Penguin

    Re: But....

    "When you turn the key, you are closing the circuit to the starter and also to the lights. If there is not enough power to cause the starter to spin, the current will simply be converted to heat in the windings of the starter motor and the lights should dim very noticeably."

    OK, I was ignoring this for a while, but I must correct you.

    Your statement of "If there is not enough power to cause the starter to spin, the current will simply be converted to heat in the windings of the starter motor" is simply wrong. That is NOT what will happen.

    What will happen is that the voltage will drop to such an extent that the starter relay will click out, the voltage will rise, and the starter relay will again click in... this will happen so quickly it will sound like a chatter or buzz. Because of this, the lights will not dim noticeably since the starter motor is never in the circuit for long, as the starter relay quickly disconnects the starter motor when the voltage drops.



  • 03-07-2008, 06:26 PM
    Sagan

    But....

    It's certainly not unusual for a battery to have enough juice for the lights to come on, but not have enough to engage the starter. But I think it is very unusual for the lights not to dim when turning the key to start if the battery is so weak that it can't engage the starter.

    When you turn the key, you are closing the circuit to the starter and also to the lights. If there is not enough power to cause the starter to spin, the current will simply be converted to heat in the windings of the starter motor and the lights should dim very noticeably.

    I'd love to know if the batterys eye was green on ct001's battery, but he won't tell us. My guess is that it was green even before he jumped it.
    <img src="http://members.roadfly.org/sagan/sigjq.JPG">
  • 03-07-2008, 01:35 AM
    markzville

    actually it may be the battery I just replaced the

    original in our 2001 530i because it was reluctantly holding a charge. By the way all the interior and dash lights came on, it just didn't have the juice to turn the starter.
    With a new Interstate in there it is starting fine.
    I recommend a BMW battery tender for the days away from running the car...
  • 03-06-2008, 11:06 AM
    apasqua

    Re: 04 Z4 Won't Start

    I Jumped started the car last night and it started right up. I drove it for a while to recharge the battery and this morning it started with no problem. It seems that the charge is holding up for now.
    Thanks for all your help.

    Al[IMG]
  • 03-06-2008, 06:53 AM
    Sagan

    Then it's not the battery.

    It's not cranking because the starter is faulty (most likely). If it were the battery, the lights would dim because the battery would be giving up its last drops of juice to the starter. If the starter is not cranking because of the battery being too drained, everything would dim dramatically.

    Look at the indicator eye of your bettery. It's right on top. It should be green.<img src="http://members.roadfly.org/sagan/sigjq.JPG">
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