318ti and Z3 Roadster

WARNING: This page does not describe the selected car, but rather 333 other vehicles, including the 2007 BMW Z4, 2007 BMW X5, 2007 BMW X3, 2007 BMW M6, and 2007 BMW M5. However, it is still accessible from the selected car via links, so may be relevant.

These vehicles are equipped with an instrument cluster that is not connected to the diagnostic link and therefore can not be coded using ZCS. Since the cluster can not be coded, these vehicles require a coding plug for vehicle specific coding.

Like the E32/E34, the coding plug is able to store the accumulated mileage and service interval information. In addition to storing the data on the coding plug the instrument cluster is also able to internally store the data on an EEPROM (Electrically Erasable Programmable Read Only Memory), as redundant back. If the cluster main processor or coding plug need to be replaced, the mileage and SI Indicator data can be transferred to the new component using the clusters test step procedure #9. higher value overwrites the lower.