Dreaded check engine came on and took it to the dealer to find out it is a $400 to replace oxygen sensor with the part. So I told them to go kick rocks and decided to get one at Autozone for $79 instead of $134 at dealer. So does anyone know where Bank 1 side 1 O2 is? And do you need a special tool to get it out or will a standard O2 wrench work? BTW its a 2nd gen.