We dismantle the sensors with the ignition off.
To remove the control oxygen concentration sensor..
... we disconnect or cut the clamp that secures the sensor wiring harness to the upper hose of the radiator of the cooling system.
Having pressed the clamp of the block of the wiring harness of the engine management system..
... disconnect the wiring harness block from the sensor wiring block.
With the "22" key, we turn off the control oxygen concentration sensor (for clarity shown on the dismantled exhaust manifold) …
... and remove the sensor.
To remove the diagnostic oxygen sensor…
... by squeezing the "legs" of the sensor wiring harness clamp with pliers, we remove the clamp from the hole in the mudguard of the engine compartment.
Similarly, we withdraw from the hole in the bracket of the lower frame of the radiator the clamp of the block of the wiring harness of the oxygen concentration sensor.
Having pressed the clamp of the block of the wiring harness of the engine management system..
... disconnect the block of the wiring harness of the engine management system from the block of the sensor wiring harness.
With the "22" key, we turn off the diagnostic oxygen concentration sensor..
... and remove the sensor.
Install the oxygen concentration sensors in reverse order.
Before installing the sensors, we apply an anti-seize high-temperature graphite-based lubricant, such as ANTI-SEIZE LUBRICANT, from Permatex, to their threaded part.
Do not allow grease or dirt to get on the sensor wire blocks and inside the sensors through the holes on their tips