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>> odometer tampering

>> Does anyone know if it's possible to tamper with the digital odometer 
on the late model bmw's ? Is resetting the computer possible by 
hacker types?

>> Here in southern California,where i have been looking at used bmw's.
I have seen a fair amount of analog bmw odometers indicating 
suspiciously low mileage not corroborated by the condition of the 
interior, tires, missed or scrubbed door lubrication stickers, 
previous smog certificates  etc.... If there was a bounty for finding
tampered odometers.... 

>> If the car has a digital odometer, can i assume  that is the true 
mileage because it is tamper proof?

no.  I bought my '94 325i used in January.  It had 55,000k miles on it
(only pait $20,000 for it!).  It also had a cracked instrument pannel
lense (the clear plastic over the gages, ...).  They replaced it under
warentee.  When they did, I suddenly had 0 miles on my car!!!!!!  I
asked around, and I was told the dealer SHOUOLD have put a yellow
sticker inside one of the door frames....  with the OLD miles.  But they
didnt.

Anyways, to replace the lense, they had to replace the entire instrument
pannel, and it has its own EEPROM (electronically programmable read only
memory) for the milage.  They also told me the "engine" should know how
many miles are one it...  but what happens if there is a rebuild
engine?!?  How about "factory" remanufactured?!?