Its been discussed a billion times. Doing it this way will leave stored codes in the ECU
Originally Posted by amalgamator
does the ball bearing mod, if reversed, leave any evidence that there has been something in the tube? i ask since my car is leased and i don't want bmw to say i caused some problems (knock on wood) by doing this, hence, voiding any part of my warranty.
Doing it this way leaves no trace at all that it was done to the car. My car is leased as are many others out there that have this done. This is the least worrysome mod to do to your car.