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      06-01-2011, 08:13 PM   #8
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Drives: 10' M3
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2010 BMW M3  [4.50]
1999 BMW M3  [0.00]
Originally Posted by Cal@Sonic MS View Post
Important Note for 2011+ E9X M3 Owners
Due to BMW's anti-tuning algorithms, those with the latest BMW ECU software will require a basic (10AMP/20AMP) trickle battery charger that is capable of maintaining a minimum of 12.5V battery voltage. This is due to the fact that the read / write times are extended in order to bypass these "locked" ECUs.
so is that for 2011+ owners or for those who have the software update? confused a little there
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