Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCHRYSLER2003300M V6-3.5L VIN MREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSOXYGEN SENSORSERVICE AND REPAIRDOWNSTREAM O2 SENSOR
2003 Chrysler 300M V6-3.5L VIN M
Downstream O2 Sensor
2003 Chrysler 300M V6-3.5L VIN MSECTION Downstream O2 Sensor
REMOVAL - DOWNSTREAM 1/2 or 2/2
The O2 sensors are located at the outlet ends of the catalytic converter.
WARNING: THE EXHAUST MANIFOLD, EXHAUST PIPES AND CATALYTIC CONVERTER BECOME VERY HOT DURING ENGINE OPERATION. ALLOW ENGINE TO COOL BEFORE REMOVING OXYGEN SENSOR.
1. Remove the negative battery cable.
2. Raise and support the vehicle.
3. Disconnect the wire connector from the O2 sensors.
CAUTION: When disconnecting the sensor electrical connector, do not pull directly on wire going into sensor.
4. Remove the O2 sensors. Snap-On oxygen sensor wrench (number YA 8875) may be used for removal and installation.
INSTALLATION - DOWNSTREAM 1/2, 2/2
The O2 sensor are located at the outlet ends of the catalytic converter.
Threads of new oxygen sensors are factory coated with anti-seize compound to aid in removal. DO NOT add any additional anti-seize compound to the threads of a new oxygen sensor.
1. Install the O2 sensor. Tighten to 28 N.m (20 ft.lbs.) torque.
2. Connect the O2 sensor wire connector.
3. Lower the vehicle.
4. Install the negative battery cable.
Fig.21 Downstream Heated Oxygen Sensor 1/2 (R) 2/2 (L):
The O2 sensors are located at the outlet ends of the catalytic converter.
WARNING: THE EXHAUST MANIFOLD, EXHAUST PIPES AND CATALYTIC CONVERTER BECOME VERY HOT DURING ENGINE OPERATION. ALLOW ENGINE TO COOL BEFORE REMOVING OXYGEN SENSOR.
1. Remove the negative battery cable.
2. Raise and support the vehicle.
3. Disconnect the wire connector from the O2 sensors.
CAUTION: When disconnecting the sensor electrical connector, do not pull directly on wire going into sensor.
4. Remove the O2 sensors. Snap-On oxygen sensor wrench (number YA 8875) may be used for removal and installation.
INSTALLATION - DOWNSTREAM 1/2, 2/2
The O2 sensor are located at the outlet ends of the catalytic converter.
Threads of new oxygen sensors are factory coated with anti-seize compound to aid in removal. DO NOT add any additional anti-seize compound to the threads of a new oxygen sensor.
1. Install the O2 sensor. Tighten to 28 N.m (20 ft.lbs.) torque.
2. Connect the O2 sensor wire connector.
3. Lower the vehicle.
4. Install the negative battery cable.
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.