E32/E34
E32/E34
The E32/E34 Instrument cluster coding plugs have progressed through three variations of design.
Start of production up to 2/89.
This original E32/E34 instrument cluster coding plug was installed in the wiring harness connector (X16) which plugged into the instrument cluster.
It contains all of the vehicle specific coding data for the instrument cluster and retains accumulated mileage and service interval information.
If the instrument cluster requires replacement the coding plug is reused with the new cluster. The mileage in the odometer does not change.
If the coding plug requires replacement, the total mileage and Service Interval information will be lost. Refer to SI Bulletin 62 02 88 (1597) for information regarding coding plug replacement.
Replacement coding plugs pre-coded by part number and are available from the parts department. Only order replacement instrument cluster coding plugs from Parts Bulletin 2-25.
From 2/89 to 9/91 production
The E32/E34 instrument cluster was redesigned in 2/89. The coding plug was also redesigned. The coding plug became an external component and no longer was a part of the X16 connector. It is plugged directly into the back of the instrument cluster.
Even though the plug can be removed without disconnecting the harness, all power must be disconnected from the cluster to prevent data loss from the coding plug. Reference SI 62 06 91 (3284) regarding coding plug removal.
9/90 Revision
In 9/90 the redesigned cluster was slightly revised. The revision included a change in the fuel gauge and some minor physical changes. The electronics were upgraded considerably which also changed the electronics of the coding plug.
The coding plug and the instrument cluster are not compatible with the earlier redesign. The printed circuit board and the coding plug are colored blue for distinction over the components of the earlier redesigned cluster.
The new blue coding plug is also keyed differently to prevent unintentional exchange with the earlier coding plug Reference SI 62 01 91 (3210) for additional information.
Coding Plug Identification
Each coding plug features a stored 5-digit numerical code that varies between model/equipment, etc.
The code can be read out through the instrument cluster display by pressing the odometer reset button and turning the ignition switch to KL R. The coding plug number will display in the instrument cluster matrix display.
If this is no longer possible, the coding plug must be removed in order to read the code on the label of the coding plug.
Ordering Replacement Coding Plug
Replacement coding plugs for the redesigned E32/E34 cluster are clearly identified in Parts Bulletin 2-25. The coding plugs are received pre-coded and installing them automatically codes the cluster.
The first digit of the 5-digit code is changed on coding plugs when they are replaced.
NOTE: It is not possible to input the mileage reading, the service interval status and the chassis number into the replacement coding plug. Adhere to the Federal Odometer Disclosure Requirement as stated in the beginning of this section.
E32/34 as of 9/91(1992 Model Year)
After 9/91 production, the instrument cluster coding plug is coded using the ZCS with the MoDiC or DIS. The physical characteristics of the coding plug are unchanged.
The replacement coding plug is received uncoded and must be encoded after installation into the cluster. P/N 62 11 8 359 368, Refer to ZCS coding section in this manual.
The ZCS encodable coding plug for this cluster can also be ordered precoded P/N 62 11 8 359 369.
Include with your order the following information
- ZCS code for the vehicle
- VIN for the vehicle