BMW X5 E53 LCM III Odometer Correction Tips

 Question:

I have a BMW X5 E53 2006 (should be CAS3). Anyone has a pinout for this LCM3 and how to read using digiprog3 or other device that can read? any suggestions which tool can do the mileage correction of all BMW model 2006 below?
*this LCM MCU is motorola (XC528647CFN4 0H30R)

bmw-x5-e53-lcm3-1

bmw-x5-e53-lcm3-2

bmw-x5-e53-lcm3-3

Suggestion:

This version work via OBDII.

MC68HC11PH8(0H30R ), use XProgUPA, BMW scan ect.

xprog-bmw-x5-e53-2

xprog-bmw-x5-e53-1

digiprog3 will correct mileage on this model via OBDII using standard OBD-16 Plug

digiprog3-bmw-x5-e53-3

digiprog3-bmw-x5-e53-2

digiprog3-bmw-x5-e53-1

E53 goes easly with bmw scanner PAsoft.

Requirements

  • BMW Scanner
  • Cluster made in 09/2001 or newer (edit: not 100% sure about this date cutoff after looking at some NCS Expert files. Might even be as late as 03.5)
  • Some common sense

After studying M and non-M EEPROM files, here’s what I found — there is a function deliberately designed to increase the speed by a certain ratio. In the non-M, the displayed speed is the real speed + 5.7%.

So here’s what you do.

  1. Start up the PASoft software and load your IKE. Read off the EEPROM.
  2. Now, in the built in hex editor, look for the following hex string (pick the appropriate one for your model). In my cluster, it was located at offset 0×339
    Code:
    M: 03 00 2D C8 00 31 D6 Non-M: 03 00 23 C8 00 25 CC
  3. Change it to the following
    Code:
    All models: 03 00 01 C8 00 01 CA
  4. Save the file, and flash the EEPROM back to your cluster.

Done. If you have stock diameter tires, your speedometer should be almost 100% accurate

If you’re curious as to how the change works, the bytes I change are used as a ratio. 0×25 = 37; 0×23 = 35. 37/35 = 1.057, or a 5.7% error. I am not sure what the 0xC8 (200) value represents; I think it might be an upper limit to the allowed error (5.7% until the error reaches 20 km/h). That last byte is simply a checksum (XOR all the values together, and then XOR with 1)

If you have a 99-01 cluster, please send me your EEPROM. I can’t promise I’ll figure out how to do the change there, but I’ll try. Also, if there are any Japanese fanatics here, please send me a dump of your cluster. In the E39, the Japanese values for the cluster are 100% accurate; I suspect the same holds true for the E46. It would be interesting to see how BMW configured the cluster.

 

 

 

FYI:

E53: Dash,EWS,LCM,DDE,EGS and VTG.
XprogM and BMW Scanner 1.40 pasoft will do the trick.

EWS by xprog-m k-line adapter,
DASH by xprog-m by back point in circuit,
KEYs take km from EWS,
LCM, EGS, DTC… by PA Soft (BMW Scanner 1.40).

 

FYI, if BMW X5 E53 2007 CAS and dash, you need r270 programmer, it will erase eeprom and write new data (dashboard done) the R270 will also do the Cas3 module it will supply wires and show you where to solder them and the software will help you complete the CAS part of this adjustment.

 

http://blog.obdii365.com/2021/01/04/correct-bmw-x5-e53-lcm3-mileage-by-xprog-upa-or-digiprog3/

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