Welcome to our blog dedicated to BMW E46 cluster customization. Today, we will delve into the fascinating realm of M35080 and 080D0WQ EEPROMS, exploring how they can enhance and personalize your E46's cluster. Join us as we uncover the secrets behind programming, modifications, and advanced customization options, allowing you to create a truly unique driving experience. Let's dive into the world of BMW E46 cluster customizing together. 

The information provided here is specifically focused on gasoline clusters,as diesel clusters are not as popular in the United States. The details shared pertain to the M35080 and 080D0WQ EEPROMS. For comprehensive instructions on how to modify an R270 for optimal performance, you can refer to the provided resource.

When using an R270 or PA SOFT to read a Bosch M35080, the breakdown is as follows:

• 0x316 represents the HW value

• 0x317 represents the CI value

• 0x318 represents the DI value

• 0x319-0x31B represents the Date range

For Motometer M35080 clusters, the breakdown differs when using PA SOFT:

• 0xC8 represents the CI value

• 0xCB represents the DI value

• 0xBA - 0xBB represents the Date range

• 0xBC represents the HW value

If you choose to read a Motometer M35080 cluster with an R270, the breakdown is as follows:

• 0x288 represents the CI value

• 0x28B represents the DI value

• 0x27A-0x27B represents the Date range

• 0x27C represents the HW value

This information proves valuable when programming M3 clusters  to function in non-M cars, but there are certain limitations to consider. Bosch M3 clusters can be converted to non-M coding indexes, allowing for proper coding using NCSEXPERT when the appropriate FA/ZCS is loaded. However, this does not apply to Motometer M3 clusters. All Bosch clusters, whether M or non-M, contain coding for DREHZAHL_KENNLINIE. Conversely, only M3 Motometer clusters have this coding. Therefore, when coding with NCSEXPERT using a non-M CI, the tachometer may reach its maximum value since its characteristics are no longer defined. If you encounter this issue, the simplest way to restore the cluster is by using an EEPROM backup created with PA SOFT.

Regarding mileage locations, I rely on the R270 for handling that, and I don't have specific details on those locations. With PA SOFT, you can change the VIN as long as the mileage is set to 0. However, it's important to note that you cannot set the mileage with PA SOFT on EEPROMS that aren't 9S366. In such cases, you can either use the R270 to set the mileage or establish an LCM (Light Control Module) on your workbench to synchronize the cluster's mileage. Before proceeding, ensure that the VIN has been addressed since changing it becomes impossible once the mileage exceeds 0. To set the desired cluster values, you can utilize PA SOFT to change the VIN and mileage in the LCM. The following bench setup pinout can serve as a reference:

For Bosch clusters (read with R270 or PA SOFT):

• VIN is located at 7A-7E

• The first two letters of the VIN are written in  hexadecimal and need to be converted from ASCII, while the numbers remain in hexadecimal format

• The last digit at 7E remains 0

For Motometer clusters (read with R270):

• VIN is located at 200-204

• The first two letters of the VIN are written in hexadecimal and need to be converted from ASCII, while the numbers remain in hexadecimal format

• The last digit at 204 remains 0

For Motometer clusters (read with PA SOFT):

• VIN is located at 40-44

To convert the coding index from an M cluster to a non-M cluster, simply subtract 16. By doing so, NCSEXPERT can write a non-M FA

Delving into BMW E46 cluster customization opens up a world of possibilities for personalizing your driving experience. With the insights gained from working with M35080 and 080D0WQ EEPROMS, you can unlock advanced programming techniques and modifications to tailor your E46's cluster to your preferences. Whether it's adjusting coding indexes, syncing mileage, or fine-tuning the VIN, the power is in your hands. Take the opportunity to make your BMW E46 truly your own, reflecting your unique style and personality. Start exploring the world of cluster customization today and elevate your driving journey to new heights.