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Is the ECCU and Trac update just the "computer downloads" ??
they don't actually replace your whole ECU unit rite?
the dealer told me I just have to come in and do the computer download
there is no waiting list for any fix unit!
is it the rite thing done to you guys' IS for the upgrade?

thx!
 

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Originally posted by yangyang11:
Is the ECCU and Trac update just the "computer downloads" ??
they don't actually replace your whole ECU unit rite?
the dealer told me I just have to come in and do the computer download
there is no waiting list for any fix unit!
is it the rite thing done to you guys' IS for the upgrade?

thx!
but i think they do replace the trac ecu though.
 

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This topic has been going through many times. If yoru IS has hesitation problem, the dealer reprograms the engine ECU and replaces the TRAC ECU.
 
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