Question about 2003 BMW M3

1 Answer

2003 BMW M3 Convertible - won't start - electrics dead

I have a 2003 BMW M3 Convertible. Using it last weekend I tried to put the roof up after parking up and nothing happened. I tried to restart the car and nothing happened. All electrical power appeared to have gone. I called a recovery firm and they assisted jump starting and told me to drive it for a while - I did for approx 2hrs solid. I just tried it again today (3days later) and again it doesn't start. When I turn the key to possition 1 or 2 no lights come on on the dash. I am guessing the battery has died but was wondering if there is a chance of a loose connection and hoping it isn't anything worse! Any ideas?

Posted by on


1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 10 achievements.


    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.

  • Master
  • 908 Answers

Main cable from battery has a joint in front footwell check this

Posted on Apr 28, 2017


5 Suggested Answers

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

a 6ya Mechanic can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repair professionals here in the US.
click here to Talk to a Mechanic (only for users in the US for now) and get all the help you need.

Posted on Jan 02, 2017

  • 87 Answers

SOURCE: 2002 BMW 325i - engine won't turn over / start.

take battery back get a new one or have it tested. like auto zone or a parts store even wal-mart now. If this battery was just dead and needed charged. Then sounds like to me you have a bad alternater. you can rely know if you can get the battery charged up and get the car to start. and while the car is running pull the positive connection of the battery if car dies bad alternater .

Posted on Jul 12, 2008

  • 113 Answers

SOURCE: 5 series Battery drain.

Hi, you will need to remove the passenger side kick panel under the dash then you will be able to see the side of the heater box, you should be able to see a black milti plug with a 2.5mm red and white wire, if you unplug this you will see the casing for the resistor, this just un clips from the heater box and remove, replacement is just the reverse, hope this helps or if you get stuck just ask for more help, mark.

Posted on Apr 10, 2009

Testimonial: "thanks for all the help."

  • 76 Answers

SOURCE: Can a weak battery cause a BMW to misfire?

hello, if the vehicle ran with cable off one would ASUME alternator is ok! however, i bad diode in the aletnator would allow it to charge yet have a massive voltage draw as well, almost all of todays parts stores will do a free starting and charging test for you! a large voltage drop would rob your ignition of voltage causing your miss!.good luck, marty

Posted on Jun 07, 2009

  • 12 Answers

SOURCE: I just purchased a 2003 M3 and the convertible top


Open the boot / trunk. There is a part where the roof is stored when it is down, that can be raised to create more trunk / boot space when the roof is up. Grab the handle and make sure it is fully pulled to the back to make sure that the roof can be stowed correctly. If this is not fully back, or there is something pressing against it in the boot, the roof will not operate. The trunk needs to be closed before operating the roof too.

Posted on Dec 23, 2010

Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

Will a a failed soft top convertible top motor show up as a OBD fault code

It will not show up with a typical P code from Autozone. It might show up with a dedicated code reader for specifically BMW. My code reader with BMW extended program does not show it. To trouble shoot this without a BMW code reader, try your buttons first, if you do not hear a motor noise, then you need to check if motor is getting power when button is pressed. Take of access panel in center of roof forward near rear view mirror. You will be able to access the motor there. Probe the electrical connections going to the motor and have someone push the buttons. Review the meter while buttons are pressed to see if motor is getting approx. 12 volts. If so then the motor may be dead. If there is not activity at the motor as far as 12 volts, then you have an electrical supply issue which could be several options: Electrical wiring, loose plug somewhere, a bad fuse (most common), a bad switch (probably not if both switches do not respond to electrical test), or a bad relay. Remember to check the truck are for the roof storage panel. If this is in the up position it will not allow enough roof for roof the store in truck and will not allow roof to move, retract.

Jun 16, 2014 | 2003 BMW Z4

1 Answer

BMW Z4 convertible top opened and now wont close. Motor runs then stops. Latch is stuck and the emergency pull cord will not release. How do I get to the latch to free the top?

try a spray lubricant into the motor mechanism and grease any visable wire cables that run from/to motor ,not the electrical cables the bare wire winder cables,also grease/ lubricate any accessable pivot/hinge points , gently pull the cord and gently push the roof back and forth occasionally trying motor with a bit of patience this should get the roof moving , also look for anything that may be snagging the roof/mechanism as there is a pressure protection system to stop the roof being fully closed on say someones hand so preventing injury

May 03, 2014 | 2004 BMW Z4 Roadster

1 Answer

2005 BMW M3 battery not holding charge, intermittently dead

install a battery tender this will mantain the voltage in the battery these work great and will not harm battery or car
  • Mar 24, 2010 | 2005 BMW M3

    1 Answer

    Bmw m3 2003wont start

    For about the last 20 years or so, most cars are equipped not to start if you press on the gas while turning the key. This is used for diagnostic purposes. DO NOT press on the gas peddle while attempting to start a fuel injected car.

    Aug 31, 2009 | 2003 BMW M3

    1 Answer

    BMW 325i Convertible roof problem

    I have a 325 convertible on a 93 .The roof will come up but wont come back down .Has any one got any idea which sensor it could be .

    Jul 06, 2009 | BMW 325 Cars & Trucks

    2 Answers

    Roof wont open

    check the parcel shelf has been put back correctly as there is a micro switch on the left hand side to stop the roof opening fully when the shelf isn't in correctly

    Apr 24, 2009 | 2007 Mini Cooper Convertible

    1 Answer

    Please help ! 1999 BMW 3M convertible

    I had a similar issue. I took it to a dealership and they gave me the code for free.

    Apr 01, 2009 | 1999 BMW M3

    1 Answer

    Convertible top will not retrack

    Hi Stan

    First of all the roof is not even soppose to operate while the trunk is open - So there is the first problem Ive been involved with BMW's for a long time and this is the first Ive heard of a roof opening while the trunk is open. There is a built in feature that tells the car not to open the roof if the trunk is open and the other way roung while the roog lid is open the trunk cant open.

    The reason the roof is not working anymore as soon as there is stress on the roof the electric motors(One operates the roof and the other operates the roof lid)  disengages, You said that the roof still worked but the lid did not so probably only the one motor disengaged. So what you have to do is open the trunk on the left hand side right behind the tail light pull away the material and simply just push the electric motor into place. that should fix your problem.

    It may happen that the two motors have become out of sync, Disengage both electric motors manualy put the roof away engage the motors and that should put the roof and lid back into sync.


    Nov 08, 2008 | 1997 BMW 328

    Not finding what you are looking for?
    2003 BMW M3 Logo

    Related Topics:

    98 people viewed this question

    Ask a Question

    Usually answered in minutes!

    Top BMW Experts

    Anthony Jones
    Anthony Jones

    Level 2 Expert

    128 Answers


    Level 2 Expert

    254 Answers


    Level 2 Expert

    281 Answers

    Are you a BMW Expert? Answer questions, earn points and help others

    Answer questions

    Manuals & User Guides