E46 Fanatics Forum banner

How long does the ECU keep info for?

729 Views 6 Replies 5 Participants Last post by  GarrettF
I know most airline "black boxes" keep info for 30 minutes and then record over. What about our ECU's?:dunno:
1 - 1 of 7 Posts
Nick325xiT 5spd said:
The ECU records the maximum rev the engine has seen, and MAY record the amount of time at redline. (It does in the M cars, but may not in the regular ones.)
According to the tech at my dealership only M cars do that..noting in regular cars is recorded..i guess he is right..
1 - 1 of 7 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Top