NISSAN SENTRA 2001 OXYGEN SENSOR PROBLEM

Question

need help i'm trying to fix my car and i bought 4 universal oxygen sensor it has 2 sensors (downstream) 4 wires

2 (upstream) 3 wires, now how can i locate the colors of the each sensor.

here are the colors one is red the others are like blue or gray and so on

and also from where i'm standing in front of the car left to right

where's Bank 1 sensor 1, Bank 1 sensor 2, Bank 2 sensor 1,Bank 2 sensor 2 please help i already got them wired

i just need to install them back

Answer 1

first, stay with original equipment sensors. second, bank one is the first 2 cylinders on the passenger side, bank 2 is the next 2 cylinders on drivers side. universal sensors will most likely turn your check engine light on. and try not to listen to most knuckle heads on these websites about your car doesnt have a bank 2. it does.

                   cyl# 1         cyl#2        cyl# 3         cyl#4
                                     front of engine  
                                            \/