Originally posted by bigMoneyRacing: I thought Bank 1 was the firewall side. 
Yes bank 1 is the firewall side, but the question was which O2 sensor do I buy, square or round connector?
As you can't see the bank 1 O2 connector I thought it might be easier to look at the bank 2 sensor to see if it was square or round.
1996 2.5LT V6 Contour ATX My Tour+help/info pics
E0 rims, Gutted Pre-Cats,CTA Custom Exhaust & Intake, Diablo Chip.
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