Mopar 5149171AA Oxygen Sensor

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Oxygen sensors are delicate, so handle them carefully. For the 2.4L engine (2014 and earlier), the upstream sensor is near the exhaust manifold, while on all other engines, the left and right upstream sensors are at the top of the catalytic converters. The downstream sensors are on the side of each catalytic converter. To remove the sensor, disconnect the wire harness and connector, and unscrew the sensor using a special oxygen sensor socket. Clean the threads of the sensor bore if reusing the old sensor, and apply anti-seize compound to the threads if necessary. Install the sensor and tighten it to the specified torque.

For the coolant temperature sensor, open the radiator cap, squeeze the upper radiator hose, reinstall the cap, unplug the electrical connector, unscrew the sensor, coat the threads of the new sensor, install it securely, and check the coolant level.

The oxygen sensor in the exhaust system reacts with the elements to produce a voltage output that varies based on the amount of oxygen in the exhaust. This feedback signal is used by the PCM to determine the required fuel injector pulse width and control the air/fuel ratio.

Disconnect the connector mounting clips, raise the vehicle and support it securely on jackstands, disconnect the connector from the engine wiring harness, and remove the sensor from the catalytic converter.

No, the emission maintenance timer cannot be reset. It must be replaced or disconnected to turn out the indicator light.

To replace the oxygen sensor, raise the vehicle, locate the sensor and disconnect the electrical connector, remove the sensor using a wrench or oxygen sensor socket, clean the threads, and apply anti-seize compound if reusing the old sensor. Installation is the reverse of removal.

RIGHT 5149171AA LEFT 5149180AA SAME PART NUMBERS ARE USED FOR UPSTREAM OR DOWNSTREAM. ONLY SIDE OF THE VEHICLE MATTERS FOR THIS PARTICULAR PART NUMBER.