BMW Z3 CONVERTIBLE 1995 E36 Convertible Tops Manual
Page 31 of 36
Z3 ELECTRO HYDRAULIC TOP COMPONENTS
The system components include:
•Electric motor/pump with reservoir
•Hydraulic cylinder with piston,
•“Off tension” microswitch
•Console mounted switch
Located in the driver’s side B pillar, the
hydraulic piston connects to the body by
a clip and the top frame by a ball pin.
The electric motor/ hydraulic pump
assembly is in the left rear corner of the
trunk. The hydraulic tubing runs through
an opening in the trunk bulkhead to the
The “see thru” reservoir of the pump has
“min/max” fill lines which allows quick visu-
al confirmation of the system fluid level.
Use hydraulic oil from kit P/N: 54 34 8 410
Emergency Valve:The hydraulic unit has
an Emergency Valve located on its top sur-
If the top can not be operated due to an elec-
trical or hydraulic fault, the valve is
unscrewed 1/2 turn allowing the top to be
Convertible Tops - 31
Page 32 of 36
Convertible Tops - 32
•Top operation is dependent on a stationary vehicle with the brake pedal depressed.
•Unlock the top at the windshield frame and raise past the tension point (microswitch
•With the windows lowered press the top switch in the console panel.
•The switch provides a ground for the control circuit of either the up or down relay. Power
is provided through the brake light switch circuit when the brake pedal is depressed.
•The activated relay provides operating power to the pump motor which is grounded
through the other relays not active contacts.
•Release switch once top is at end of travel.
•Motor reversal is achieved when the switch is pressed in the opposite direction activat-
ing the other relay.
Page 33 of 36
Convertible Tops - 33
Z3 CONVERTIBLE TOP ADJUSTMENTS
The following adjustments are pos-
sible on Z3 convertible tops. The
Repair Manual section of TIS pro-
vides system component R&R and
Adjustment Shims for Base
mount to body. Procedures for
Additionally, the Repair Manual has
Replacing Rear Window
Replacing Convertible Cover
Replacing gas spring strut
Not included in the repair manual is the
adjustment procedure for the windshield
The hook(s) can be adjusted to correct
for inadequate sealing at the windshield
seal or if the hooks are excessively hard
Loosen the small recessed allen set
screw. Screw the threaded hook in or out
as needed to adjust. Pull the allen screw
completely out and apply a light coating
of loctite on the threads. Tighten set
Page 34 of 36
Convertible Tops - 34
The following information on the Z3
convertible top is also available in
the Repair Manual:
•Notes on electrohydraulic con-
•R&R hydraulic control unit
•R&R Hydraulic Cylinder
Page 35 of 36
Convertible Tops - 35
Z3 CONVERTIBLE SPECIFIC SI BULLETINS
Refer to the following list of Service Information bulletins when servicing a Z3 convertible.
Always check the most up-to-date SI’s and recent DCS messages for current service
•Z3 STOWAGE BOOT REPAIR KIT. P/N 54 31 8 401 804. SIB 54 05 96.
•Z3 TOP WATER LEAKS. SIB 54 02 96.
•CONVERTIBLE TOP CLEANING KIT. P/N 83 12 9 407 806. SIB 54 07 95.
Page 36 of 36
Convertible Tops - 36
• Always personally verify the customer complaint.
•Always verify that the complaint is truly a system malfunction.
• Perform a Quick Test to determine if the vehicle systems have logged fault codes.
•Call up the faulted system or appropriate test schedule to verify the correct control
module is installed in the car.
•Follow the Diagnostic Information System (DIS) on screen instructions and perform all
tests as specified.
•Use the DIS and fault symptom diagnostic procedures as trained.
•Follow the appropriate test module procedures for systems that malfunction but fail to
set faults in memory.
•System problems which elude diagnostic procedures must be brought to the attention
of BMW of North America, Inc.
•BMW Technical Assistance Hotline 1-800-472-7222
• BMW Service Training Feedback Message Center 1-201-573-2186