Quote:
Originally Posted by SilentAttack
I see so really it just frees up breathing room n stuff to get HP that was robbed? Yeah I havent changed the spark plugs yet but I only have 20k on the car.
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Could be a number of things, BMW doesn't necessarily release changelogs in detail. Typically cars that have a very old SV (typically 190E or earlier) see considerable gains when updating - when included as part of normal maintenance.
Depending on your production date, dealer will likely update your M3 during the plug change if you want to wait.