BMW Z3 DIYs
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  • |Interior DIYs|
    • Instrament Cluster
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    • Rough Idle Fix
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What coils to use?

Any Bremi style ignition coil from a 2.8L M52B28 BMW [12131748018] or updated [12137599219]
  • 1995-2000 E36 328i
  • 1995-1999 E39 528i
  • 1995-1999 E38 728i/728iL
  • 1997-1999 E36/7 Z3 2.8
    Note: Coil 1 Must be ground down to fit, like this example Here.


Picture

What Harness to use?

Any cable harness off of an M52 [12511744589]:
  • 1995-2000 E36
  • 1995-1999 E39
  • 1995-1999 E38
  • 1997-1999 E36/7 Z3 2.5/2.8/3.0/ 3.2
This is needed for the 6 connectors that attach to the coils. 4 are needed.
Picture

How to connect the harness?

These are the part numbers for the connector and pins that connect into the factory coil pack harness.

​The full Harness can be found on an 87-90 BMW E30, E34.
Known as the Plug-board injection valve. [12511719606]

​Only the connector with the 6 pins is needed from the injector valve, or you can order the connector and build it yourself.
Picture
Connector [12521718125]
Picture
Pins [x6] [61131376191]
Picture

Where to get a mounting plate?

You can order an already made Mounting Plate here.
or
You can make your own using flat bar aluminum from here. [2.5" x 3/16" x 24"]
Download Schematic

Wiring Diagrams and Extras

Wiring Diagram for Harness
Picture

Picture
Pin:   Location:                                         Color:
3       4a: Joint ground of secondary coils    Brown
2       15: Joint 12v                                    Green
5       Ignition coil 4                                   Blue
7       Ignition coil 3                                   Yellow
6       Ignition coil 2                                   Red
1       Ignition coil 1                                   White
4       Not Used                                          N/A
Picture
Pin assignment, primary connection:
- Pin 1 = terminal 1 of ignition coil 1
- Pin 2 = terminal 15, 12v
- Pin 3 = terminal 4a
- Pin 4 = not allocated
- Pin 5 = terminal 1 of ignition coil 4
- Pin 6 = terminal 1 of ignition coil 2
- Pin 7 = terminal 1 of ignition coil 3

Picture

Picture
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  • |Home|
  • |Mechanical DIYs|
    • Tune-Up
    • Oil Change
    • Crank Case Vent Valve
    • Air Filter
    • Reset Oil Service Light
    • Code Scanning
    • Temperature Sensor
    • Valve Cover Gasket
    • Camshaft Position Sensor
    • Upstream O2/Lambda Sensor
    • Intake Temp Sensor
    • Coil On Plug Conversion
    • Clutch [Writeup]
    • Power Steering Removal
    • Bleeding the Cooling System
    • Seafoaming
    • Bleeding Coolant System
    • Heli Coil [How To]
    • Valve Cover Painting
    • Steering Damper Upgrade
  • |Interior DIYs|
    • Instrament Cluster
    • Seat Bushings
    • Interior Light Bulbs
    • Speakers
    • Interior Door handle Cover
    • Stereo Removal
    • Chrome Ring [Gauge Cluster]
    • Steering Wheel [Upgrade]
    • Push Button Start
    • Console Lock Switch
    • Euro Glove Box and Trim
    • Interior Door Pull
  • |External DIYs|
    • HID kits
    • Fog Light Bulb
    • Headlights
    • Door Handle [Painting]
    • Side Mirror
    • Door Handle Gasket
    • Roundel Removal
  • |Suspension DIYs|
    • Front Struts
    • Rear Shocks
    • Sway Bars
    • Brake and Clutch Bleeding
    • Front Brakes
  • |Comments|
  • |Extras|
    • FAQ
    • Diagnosis
    • Specifications
    • Resources
  • |Blogs|
    • Rough Idle Fix
    • The Race to Autocross