Left and right are determined from sitting in the driver seat.
You need to change the upstream sensor
Assuming we are talking O2 sensors, the downstream O2 sensors left and right are the same. The upstream O2 sensor left side is left side upstream only. Upstream right side fits both left and right sides upstream only. The difference is the length of the wires for the upstream sensors.
Bank one is the same side as cylinder number one. Sensor one is upstream or before the catalytic converter.
O2 circuit, bank 1 sensor 1, now in english you have an O2 sensor gone bad.You have 2 of them, an upstream and a downstream one. I would suspect the upstream one.
All O2 sensors are threaded into the exhaust system. Bank 1 is the bank of cylinders that contains the number 1 cylinder. Sensor 1 is upstream (before the catalytic converter) and sensor 2 is downstream (after the catalytic converter). Your Accent has a 1.7 4 cylinder engine and has only one bank of cylinders. But it has 2 O2 sensors, one before (upstream) the cat and one after (downstream) the cat. The upstream sensor may also be called the Air/Fuel sensor.
Depends on what the problem is or what code was set.
bank 2 is the drivers side of the engine on your Ford Expedition sensor 1 is in the exhaust upstream ( before the exhaust enters the catalytic converter )
Bank 1 is the bank of cylinders that contain cylinder 1. The O2 Sensor 1 is the O2 sensor located in the exhaust system between the cylinder head and the catalytic converter, also known as the "upstream" O2 sensor.
Bank 1 is the side that cylinder 1 is on, sensor 1 is downstream and sensor 2 is upstream
Bank one is the driver side on a 3.7L. There will be an upstream ( sensor 1 ) and a downstream ( sensor 2 ).
Mitsubishi Galant, 2002, 4-cyl, O2 sensor, bank 1 sensor 1 (upstream)... PART NUMBER: MR506364
On a Ford Expedition : Bank 2 is the drivers side of the engine Sensor 1 is between the engine and the catalytic converter ( upstream )