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E85 / E86 Z4 (2003-2008)
E85 Z4 Roadster, E86 Z4 Coupe, E85 Z4 M Roadster, and E86 Z4 M Coupe talk with our BMW gurus here.

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  #1  
Old 07-21-2009, 01:56 PM
Jermy1304 Jermy1304 is offline
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03 BMW Z4 Convertible Top Problem. Don't think its the motor!

I have an 2003 BMW Z4 3.0i with a convertible top problem. Very infrequently when i went to put the top down, the red indicator would just flash. Windows wouldn't go down. Top would not unlatch. It bit the bullet about 5 days ago and i took a look at it. The top takes 2 grown men to put down/up(Don't know if that is normal). The odd thing is when i get the top to about 1/3 the way from the lowered position, the top will work. The lower button works, and the top is pulled down and locked in. The top will go 1/3 the way back up with the button also. When i get 1/3 the way up, the red indicator just flashes and i have to manually raise it from there. I may be wrong, but I don't think this is a problem with the motor/pump. In that isolated range, the top works fine. I am hesitant to pull this thing apart without a good idea of what i'm looking to accomplish since i know this is a big job. anyone got any ideas? My alternative is to pay $20 for a BMW master tech to answer my question on justanswerDOTcom.
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  #2  
Old 07-21-2009, 07:24 PM
cavman cavman is offline
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I think it might be like a garage door. It might have lost it's travel range. The motor doesn't know where full close positon is or full open is. I think you might need to have a look at where the motor/s are located for the roof and see if there is a reset switch.

Good luck

CM
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  #3  
Old 07-23-2009, 06:34 AM
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shipkiller shipkiller is offline
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Quote:
"Very infrequently when i went to put the top down, the red indicator would just flash. Windows wouldn't go down. Top would not unlatch."
The main cause of this (but not limited to) is normally the rear switch. (Convertible Compartment Floor Switch) This is a known issue.

Quote:
"The top takes 2 grown men to put down/up(Don't know if that is normal)"
Did you first pull/set the red hydraulic release handle located in the trunk? If you did not do this, the top WILL be very hard to move....

See this link on how to move the top manually:
http://www.z4-forum.com/forum/viewto...p?f=32&t=11274

Personally, I really do think your electro-hydraulic motor is going out. Unless I read this wrong, the top goes down easier than going back up. Of course. It takes less hydraulic pressure to lower the top than it takes to raise the top.

Here are two links that tell you how to remove the top from the car and how to replace your motor:

http://www.z4-forum.com/forum/viewto...p?f=32&t=10189

http://www.z4-forum.com/forum/viewto...p?f=32&t=10190
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  #4  
Old 07-23-2009, 10:06 AM
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basar13 basar13 is offline
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my motor changed
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  #5  
Old 07-26-2009, 05:01 PM
Jermy1304 Jermy1304 is offline
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Shipkiller, I don't know if you could have made an "Instructional How-to" better than that. I was planning on pulling the top out Monday with a friend and this is beyond helpful. On behalf of everyone with a Z4 that this problem will most likely happen to during the ownership of the car, THANK YOU!
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  #6  
Old 07-26-2009, 05:06 PM
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shipkiller shipkiller is offline
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Thanks.

Just make sure you seal the motor housing (Sound Insulation) well with RTV. I made sure that NO water will ever get into my new motor...
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How does something immoral, when done privately, become moral when it is done collectively?
Furthermore, does legality establish morality?
Slavery was legal; apartheid was legal; Stalinist, Nazi, and Maoist purges were legal. Clearly, the fact of legality does not justify these crimes. Legality, alone, cannot be the talisman of morel people. - Walter E. Williams
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  #7  
Old 07-27-2009, 12:52 AM
P2ayc P2ayc is offline
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Quote:
Originally Posted by Jermy1304 View Post
I have an 2003 BMW Z4 3.0i with a convertible top problem. Very infrequently when i went to put the top down, the red indicator would just flash. Windows wouldn't go down. Top would not unlatch. It bit the bullet about 5 days ago and i took a look at it. The top takes 2 grown men to put down/up(Don't know if that is normal). The odd thing is when i get the top to about 1/3 the way from the lowered position, the top will work. The lower button works, and the top is pulled down and locked in. The top will go 1/3 the way back up with the button also. When i get 1/3 the way up, the red indicator just flashes and i have to manually raise it from there. I may be wrong, but I don't think this is a problem with the motor/pump. In that isolated range, the top works fine. I am hesitant to pull this thing apart without a good idea of what i'm looking to accomplish since i know this is a big job. anyone got any ideas? My alternative is to pay $20 for a BMW master tech to answer my question on justanswerDOTcom.

I may be off the mark - but when mine just flashes red & windows don't go down - I put the shelf up & then back down & it works. Seems to be something withthe contact from time to time.
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  #8  
Old 07-29-2009, 02:15 AM
Jermy1304 Jermy1304 is offline
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P2ayc, I thought when the trunk compartment error light is a yellow solid led....I checked my trunk compartment and had a friend hold it all the way back while trying to open the top and nothing. the crazy thing is if i manually put it almost all the way down and lower it, the motor pulls it from 1/3 up position to down and goes click, click, click, click and the red led goes off signaling it is closed. When i try to put it back up it clicks then raises it 1/3 of the way and stops and flashes again. I am wondering about 4 different things. 1) Maybe it slipped off its tracks and doesn't know where it is in the open/close process...since it "remembers where it is at".. 2) The Trunk Compartment Switch is bad and it only affects the front 2/3 of the top lowering/raising motion. 3) A Weak electric motor 4) Maybe this top is driven by 2 hydraulic pumps, one raises it from the bottom to 1/3 raised and the other raises it the rest and that is bad. The terrible thing about this is there are 15+ things that can go wrong to make almost identical symptoms. I've got the top down and car cover on in the garage, and i'm pulling that top out tomorrow to waterproof the motor, clean and probably expand the size of the drain holes, and see what is going on...I hope i can get this fixed..I have 20 inch Beyern wheels, a tail light red out kit, a brushed aluminum illuminated shifter, and a imola red bmw emblem kit in the mail right now! I'll put pictures up after all the mods of course.
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  #9  
Old 08-22-2009, 10:11 AM
monfacile704 monfacile704 is offline
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i just reinstalled the convertible top on my 2003 z4 after rebuilding the hydrolic motor that lifts the top up and down. After reinstalling the top, the top goes up, but will not go down. The little motor that cinches down the top will not activate to release the top and the switch does not light. If I manually release the top by turning the motor with an allen key, the switch lights up and the bottom motor kicks in and brings the top down. Any suggestions on what could be wrong. The top motor locks in to close but is not unlocking to let the top down
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  #10  
Old 08-22-2009, 11:21 AM
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shipkiller shipkiller is offline
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That sounds like the "Compartment Floor Switch" located on the back wall of your trunk (boot). That was the first problem I had with my top. The arm came off the switch, so I replaced it. A malfunctioning switch will let you raise the top but not lower it. Just make sure your top floor is in the DOWN position. You may want to cycle the floor up and down a few time to make sure. If that does not clear the problem, then remove the switch and activate it yourself while having a second person operate the top... If that fixes the problem, you can jumper out the switch until the new switch arrives.... This is a somewhat common problem with that switch. The arm falls off...

A picture of when I remove my Top. You can see the switch in the center of the rear firewall:


Picture of the switch with the arm missing:


The switch assembly:


As seen through the rear window. Switch assembly removed:
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How does something immoral, when done privately, become moral when it is done collectively?
Furthermore, does legality establish morality?
Slavery was legal; apartheid was legal; Stalinist, Nazi, and Maoist purges were legal. Clearly, the fact of legality does not justify these crimes. Legality, alone, cannot be the talisman of morel people. - Walter E. Williams
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  #11  
Old 08-22-2009, 12:45 PM
monfacile704 monfacile704 is offline
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I believe that that switch is good. I did what you said already and when the switch is activated the motor goes after i manually release the top motor. I believe that some sort of position sensor is bad, Do they exist and where are they?
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  #12  
Old 08-22-2009, 12:46 PM
monfacile704 monfacile704 is offline
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The top seems confused about its position on the way down and is stopping midway
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  #13  
Old 08-22-2009, 01:36 PM
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shipkiller shipkiller is offline
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Post

Attached are some drawings from the WDS on how it is wired up. They are not as good as seeing them on the screen. You will have to zoom in on part 1 & 2 to read them properly.

Before I go on. I have to ask the dumb questions. Are you SURE you got all the connectors attached. Since you pulled the top out,
I know you now know the ones I am talking about. The ones to the control unit and the two connectors on the right side of the car? The ones behind the seats and trim...

From what I understand is there are only four sensors. The Softtop Floor, Softtop Lowered, Softtop Closed, Softtop Scuttle Released and Softtop Scuttle Locked.

I think the Scuttle is the locking mechanism on the front of the top. My 03 does not have the Hardtop Locating Point Hall Effect Sensor.

Hope this helps.

Here is what the WDS says:


Fully automatic convertible top

The fully automatic convertible top is a folding top fitted as an option.
The soft top is opened and closed hydraulically. When closed, the soft top is locked on the window frame via catches. The catches are driven by means of an electric drive. After opening, the soft top is stored in the convertible top compartment and locked in place by the catches.
Brief description of components

Convertible top module IV (CVM IV)

The convertible top module (CVM IV) controls and monitors the hydraulic and electrical drive and locking components of the folding top. The convertible top module also monitors the convertible top switch, the hydraulic pump and the locking drive, and saves any faults that occur in the fault memory.
The soft-top module is connected to the K bus.
General module

The power windows are controlled during soft-top operation by the general module of the central body electronics (ZKE). The general module therefore receives the information 'Open/close top' or 'Top complete closed' or 'Complete open' across the K bus.
Instrument cluster

The instrument cluster provides the convertible top module IV (CVM IV) via the K bus with the information 'Outside temperature' and "Vehicle moving" or "Vehicle stationary" (speed greater than/less than 4 km/h).
Exchange of information is across the K bus.
Hydraulic unit

The hydraulic unit creates the hydraulic pressure required for the top movement. The hydraulic unit consists of an oil reservoir that has an integrated pressure pump. All the hydraulic valves are integrated in the hydraulic unit. The hydraulic system is a closed, self-venting system. Topping up hydraulic fluid is not required.
The pressure pump is driven by a reversible DC motor. To change the direction of movement of the folding top, the direction of rotation of the pump motor is switched.
The pump only operates in the case of top movements. To prevent damage, the hydraulic unit is monitored by an integrated temperature sensor. At a temperature of 105C, the pump in the hydraulic system is switched off. The soft top can then only be moved by hand.
Hydraulic rotary drives

The soft top is moved in two directions by dual-action hydraulic rotary drives for opening and closing. Here, the racks of the hydraulic cylinder engage in pinions that convert the longitudinal movement of the hydraulic cylinder into a rotary motion. The pinions transfer the rotary motion across the main bearings to the convertible top frame. The hydraulic rotary drives are fitted on the left and right in the main pillar on the main bearings of the convertible top frame.
Soft-top locking mechanism

For the soft-top locking mechanism, there are two catches which are opened or closed by an electric motor.
When closed, the soft top is locked on the window frame (cowl panel) via catches.
After placing in the convertible top compartment, the soft top is also locked in place by the catches.
In the event of an electrical function failing, emergency release is possible by hand.
Convertible top switch and condition indicator

The convertible top switches are fitted in the switching center in the center console. There are separate switches for opening and closing the soft top.
For the display of the active and/or receding state, red and yellow LEDs are fitted beside the convertible top switch:
The red LED lights up while the top is moving. When one of the final positions is reached (top stored in the convertible top compartment or locked on the cowl panel), it is switched off. The LED flashes when the convertible top switch is released while the top is not in one of the two final positions.
The yellow LED lights up when the convertible top switch or the convenience function sends a request for opening while the convertible top compartment floor is not down.
Hall sensors

In order to detect the convertible top position and the two final positions of the locking mechanism, non-contact switches (Hall sensors) are used. The Hall sensors for identification of the convertible top position are fitted on the right-hand main convertible top bearing. The Hall sensors for the cowl panel lock are located on the cowl panel lock in the front convertible top bow strut. The information from the Hall sensors is processed in the convertible top module IV (CVM IV).
Convertible top compartment floor switch

The convertible top compartment switch is a ground-switching contact that generates the signal "Floor down" when the convertible top compartment floor is located in the lowest position. As long as this information is not present, the soft top cannot be unlocked and opened.
The convertible top compartment floor switch is fitted on the folding mechanism of the convertible top compartment floor.
Hardtop locating points

Contact plates are fitted in each of the two hardtop locating points at the main convertible top bearings. Each contact plate has a contact for power supply of the rear window heating and a contact for hardtop detection.
Main functions

It is possible to open / close the convertible top by means of:
  • Convertible top switch (open and close)
  • Convenience closing and convenience opening
    via door lock or remote control (coding-data-dependent!)
The following conditions must be met at one time for automatic movement of the top:
  1. General module can lower the window without faults
  2. Vehicle standstill (v < 4 km/h)
  3. No hardtop fitted (only applies to closing)
  4. Ignition key position as of terminal R (not in the case of convenience function)
  5. No short circuit and no breaks in wiring present
  6. Outside temperature has not fallen below limit value
Opening the top with the convertible top switch

Pressing the convertible top switch for "Open top" opens the soft top according to the following sequence:
  1. Windows are lowered (power window activated for 1.5 seconds if one window is detected as closed).
  2. Lock hooks are opened. The convertible top is unlocked at the front cowl panel
  3. The convertible top is moved backwards
  4. Convertible top is stored in the convertible top compartment
  5. The locking hooks are closed
  6. The top is locked in the center in the convertible top compartment
  7. Red LED goes out
  8. Windows are raised (2 seconds after locking)
Closing the top with the convertible top switch

Pressing the convertible top switch for "Close top" closes the soft top according to the following sequence:
  1. Windows are lowered (power window activated for 1.5 seconds if one window is detected as closed).
  2. The locking hooks are opened and the catch in the center of the top is released.
  3. The convertible top is lifted out of convertible top compartment
  4. The convertible top is moved forwards
  5. Locking hooks are inserted in the cowl panel
  6. The locking hooks are closed and the top is locked at the cowl panel
  7. Red LED goes out
  8. Windows are raised (2 seconds after locking)
NOTE: If the convertible top switch is released during closing and opening, the movement and locking of the folding top is interrupted immediately. As there is no blocking of the drive, only the self-regulation system of the mechanical system and the hydraulic rotary drive have an effect. Pressing the convertible top switch again restarts the stopped movement.
Convenience opening/closing

The driver's door lock opens or closes the top in the following sequence:
  1. Insert the ignition key in the driver's door lock
  2. Turn the ignition key to the right and hold in this position
    The general module (GM) immediately sends the telegram "Convenience operation" to the convertible top module IV (CVM IV)
  3. The remainder of the sequence is the same as for "Opening the top with the convertible top switch", Steps 1 to 7.
  4. Turn the ignition key to the left and remove
    NOTE: Closing with the driver's door lock (convenience closing) is no longer possible as of terminal R.
Rear-window defroster (demister)

As long as the soft top is locked and terminal R is on, the convertible top module IV (CVM IV) provides a signal for control of the rear window heating.
Power supply for the rear window heating of the soft top comes from the convertible top wiring harness. If the hardtop is fitted, the power supply for the rear window heating is by means of contact plates on the rear hardtop locating points.
Hardtop detection

If a hardtop is fitted, a contact that closes to ground generates the signal "V_SPERR" which blocks the "Close" function.
Storage locking

To release: On completion of an opening procedure, the soft top is stored in the convertible top compartment and locked in place. As interlock, the central locking lug of the cowl panel lock engages in the retainer on the convertible top compartment.
To close: At the start of a closing operation, the cowl panel lock is operated first. Here, the center locking lug of the cowl panel lock is moved in. This disengages the mechanical interlock.
Cowl panel lock

Locking and unlocking the folding top on the cowl panel (upper window frame) takes place electromechanically with the cowl panel lock in the front convertible top bow strut. To this end, there are locking hooks on the left and right of the cowl panel lock.
For closing the folding top, the locking hooks are closed and locked after entering the cowl panel.
The rotary motion of the spindles of the cowl panel lock required for opening and closing is generated by a direct current motor with angle gear. The direct current motor with angle gear is located in the center of the front convertible top bow strut. The rotary motion is transferred via flexible shafts.
Emergency closing / emergency opening

In the event of failure of electrical and/or hydraulic functions, the top can be opened and closed using emergency unlocking/locking systems.
Emergency closing:
  1. In the luggage compartment on the left-hand side below the convertible top compartment floor, pull out the plastic ring attached to a Bowden cable as far as it will go.
  2. With a 90-degree turn, lock the plastic handle in this position.
    In the hydraulic unit, a short circuit is enabled, making it possible to open and close the folding top by hand.
  3. Pull the handle of the Bowden cable in the rear panel of the luggage compartment.
    The interlock in the convertible top compartment is released.
  4. Move the top forwards by hand until it reaches the cowl panel.
  5. Take the Allen key from the on-board toolkit.
  6. Remove the plastic panel from the front roof brace.
  7. Insert the Allen key in the uncovered internal hexagon.
  8. Lock and unlock the cowl panel lock by turning the Allen key.
  9. Take out and replace the Allen key.
Emergency opening:
  1. Perform steps 1 and 2 as well as 5 to 7 from 'Emergency closing'.
  2. Unlock and open the cowl panel lock by turning the Allen key.
  3. Take out and replace the Allen key.
  4. Move the top backwards until it reaches the convertible top compartment

Edit: Adding a more files.
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Attached Files
File Type: pdf SoftTop Power.pdf (50.5 KB, 1487 views)
File Type: pdf Softtop Control part1.pdf (92.5 KB, 1118 views)
File Type: pdf Softtop Control part2.pdf (90.4 KB, 727 views)
File Type: pdf Softtop Drives.pdf (91.7 KB, 980 views)
File Type: pdf Softtop Module Pinout.pdf (91.6 KB, 949 views)
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How does something immoral, when done privately, become moral when it is done collectively?
Furthermore, does legality establish morality?
Slavery was legal; apartheid was legal; Stalinist, Nazi, and Maoist purges were legal. Clearly, the fact of legality does not justify these crimes. Legality, alone, cannot be the talisman of morel people. - Walter E. Williams

Last edited by shipkiller; 08-22-2009 at 02:53 PM. Reason: Adding a More files.
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  #14  
Old 08-22-2009, 04:31 PM
monfacile704 monfacile704 is offline
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Before I continue I just want to thank you again for all of the information that you have provided me with. There is no issue at all with the top rising up. Works fine if it is manualy released and I want to use the electric power top. The issue is on the going down. I press the down button and there is nothing. no red light nothing. If I manually release it by using the allen key on that small motor and press it with my hand, it blinks when it is released "red blink" It will then go down if I hold the button, but it stops a little more then halfway.. I know that that a tiny switch broke of the mounting somehow when I put the top back on, and I glued it back in place and dabbed a wad of silicone over it to keep it from moving anywhere. one screw that held it and it snapped off from the one screw mount. I crazy glued it exactly back and wadded silicone around it to hold it snug. I am wondering if that was the up position switch. It looks like a 1 cm box with a wire going to it. It is right next to where the top bolts back into the car. Could it be faulty by the way I glued it. I called the dealership and that switch is 130 bucks. I dont want to replace it and if find out it is something different that is wrong. Any thoughts?

Chris

Last edited by monfacile704; 08-22-2009 at 04:52 PM.
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Old 08-22-2009, 04:54 PM
monfacile704 monfacile704 is offline
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When i get back to my friends garage i am going to disconnect and reconnect the battery Will that reset the control module?
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  #16  
Old 08-22-2009, 04:58 PM
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shipkiller shipkiller is offline
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Is that switch shown in any of the pictures in my last post? It sounds like the switch is activating or deactivating during movement of the frame when is should not be. Dollars to donuts that is your problem.
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How does something immoral, when done privately, become moral when it is done collectively?
Furthermore, does legality establish morality?
Slavery was legal; apartheid was legal; Stalinist, Nazi, and Maoist purges were legal. Clearly, the fact of legality does not justify these crimes. Legality, alone, cannot be the talisman of morel people. - Walter E. Williams
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Old 08-22-2009, 05:01 PM
shipkiller's Avatar
shipkiller shipkiller is offline
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Quote:
Originally Posted by monfacile704 View Post
When i get back to my friends garage i am going to disconnect and reconnect the battery Will that reset the control module?
yes. Leave the battery off for at least 10 minutes but I don't think it will fix the problem. It's worth a shot..
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How does something immoral, when done privately, become moral when it is done collectively?
Furthermore, does legality establish morality?
Slavery was legal; apartheid was legal; Stalinist, Nazi, and Maoist purges were legal. Clearly, the fact of legality does not justify these crimes. Legality, alone, cannot be the talisman of morel people. - Walter E. Williams
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Old 08-29-2009, 11:48 AM
monfacile704 monfacile704 is offline
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Shipkiller,

Thank you so much for your help and info. The problem turned out to be that sensor switch. When I glued it back in place, it was glued 90 degrees off turn. Pulled everything apart and re glued it exactly where it broke of the holding screw. Perfect repair and all is back together. I think that I can pull off the top of that car now in less than 15 minutes.
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  #19  
Old 09-20-2009, 02:26 PM
birchescrest birchescrest is offline
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Quote:
Originally Posted by monfacile704 View Post
i just reinstalled the convertible top on my 2003 z4 after rebuilding the hydrolic motor that lifts the top up and down. After reinstalling the top, the top goes up, but will not go down. The little motor that cinches down the top will not activate to release the top and the switch does not light. If I manually release the top by turning the motor with an allen key, the switch lights up and the bottom motor kicks in and brings the top down. Any suggestions on what could be wrong. The top motor locks in to close but is not unlocking to let the top down
Hi Monfacile704, You mention that you rebuilt your motor. Have you completely stripped it down and rebuilt it? I have removed my temperamental roof and found the hydraulic motor bathing in a nice pool of rusty water. Looking at the motor I cant see any easy way to open it up without beaking it, is there any way of opening the motor so you can clean the bushes etc as the motor isnt completely shot and still has some life in it.

P.S. BIG thanks to shipkiller for all the instructions; I would not have even thought about removing the roof without it!
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Old 09-27-2009, 07:46 PM
monfacile704 monfacile704 is offline
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Mein Auto: bmw z4
I brought it to a local shop. Cost me a hundred and fifty bucks as opposed to the thirteen hundred that BMW wanted for a new motor. They rebuilt my motor and it is as good as new. I had to buy the hydrolic fluid from BMW and that was 60 bucks for less than a pint. If you have a small motor, starter/ alternateur guy by you, he can probably rebuild the motor for you. Good Luck with that. Your motor can probably be rebuilt
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  #21  
Old 09-28-2009, 12:19 PM
Jermy1304 Jermy1304 is offline
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Location: Houston, TX
 
Join Date: Mar 2009
Posts: 508
Mein Auto: 2003 BMW Z4 3.0i
the motor is only $375 brand new from ECSTUNING.COM
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  #22  
Old 05-01-2010, 03:48 PM
drclark drclark is offline
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Location: Navarre Florida
 
Join Date: Jan 2010
Posts: 7
Mein Auto: Z4
Angry Manual Operation

Well, it finally happened. My convertible top motor failed. The latch motor works but there is not a sound coming from the previously moaning motor that raises and lowers the top. I can't afford to fix it now but would still like to lower the top manually. However, when I tried to pull the red ring in the trunk, it doesn't budge at all, not even a fraction of an inch. The manual says to pull the ring and move 90 degrees from the original position when experiencing an electrical malfunction. The ring doesn't pull out at all. Any advice would be greatly appreciated.
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  #23  
Old 05-13-2010, 10:16 AM
RMeter RMeter is offline
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Location: Tinly Park, IL
 
Join Date: May 2010
Posts: 8
Mein Auto: 2003 Z4 3.0
Quote:
Originally Posted by Jermy1304 View Post
the motor is only $375 brand new from ECSTUNING.COM
Jermy I also bought a new motor from ECS however the hydro lines on the new motor are in different positions. Did you change the hyrdro line positions of the 14, 12 and 13, 11 to match the new motor or did you keep them in the same spot as the old motor? Also did you wire it green wire to green and blue wire to red?
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  #24  
Old 05-14-2010, 05:20 AM
craig01b craig01b is offline
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Location: Guelph Ontario
 
Join Date: Apr 2010
Posts: 62
Mein Auto: 2003 z4
When I did mine, it worked fine until i reinstalled all the hoop, and buttoned everything up....was rather confused, since it worked before. With the power back on the car, and me, moving the roof during the install of the hoop, it seemed to confuse the module. At that point, I found a wiring diagram, and since everything goes thru that module, i figured a power reset might cure it....it did...Much like a bloody Airbus......Although, I had no red flashing light, the roof moved, but only a couple of inches at a time, and a 2 second delay before it would move again. It would fully open and close, just took 10 minutes to do. After the reset, operation has been flawless.

C

Last edited by craig01b; 05-14-2010 at 05:29 AM. Reason: more info
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  #25  
Old 05-14-2010, 05:22 AM
craig01b craig01b is offline
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Location: Guelph Ontario
 
Join Date: Apr 2010
Posts: 62
Mein Auto: 2003 z4
drclark....exactly same as mine. You have little choice but to replace it. I found, that with even pressure (i used a small jack to hold the roof open as I removed stuff) I found that the bypass was working, but extremely slowly. I ended up with the roof in the mid position which made the remove simpler.

Good luck

C
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