Removal procedure
Bank 1 - Sensor 1
1. Disconnect the negative battery cable.
Note: The oxygen sensor has a one-piece pigtail and connector. Do not remove the flexible lead from the oxygen sensor. Damage or removal of the pigtail or connector will affect the performance of the oxygen sensor. Handle the oxygen sensor with care. Do not drop the oxygen sensor.
2. Disconnect the upstream heated oxygen sensor connector at the rear of the bank 1 cylinder head.
3. Remove the front exhaust pipe. See Part 1G3, Exhaust System - HFV6 3.2L.
4. Remove the rear catalytic converter. See Part 1G3, Exhaust System - HFV6 3.2L.
5. Remove the rear exhaust manifold. See Part 1C2, "The mechanical part of the engine is HFV6 3.2L.
Attention! Let the engine cool before removing the oxygen sensor. Removing the oxygen sensor on a hot engine may damage the threads in the exhaust manifold.
6. Using the DW170-010 oxygen sensor remover/installer, carefully remove the upper heated oxygen sensor from the rear exhaust manifold.
Bank 1 - Sensor 2
1. Disconnect the negative battery cable.
2. Disconnect the downstream heated oxygen sensor connector.
Attention! Let the engine cool before removing the oxygen sensor. Removing the oxygen sensor on a hot engine may damage the threads in the exhaust manifold.
3. Using the DW170-010 oxygen sensor remover/installer, carefully remove the lower heated oxygen sensor from the muffler downpipe.
Bank 2 - Sensor 1
1. Disconnect the negative battery cable.
2. Disconnect the upstream oxygen sensor connector.
Attention! Let the engine cool before removing the oxygen sensor. Removing the oxygen sensor on a hot engine may damage the threads in the exhaust manifold.
3. Using the DW170-010 oxygen sensor remover/installer, carefully remove the upper heated oxygen sensor from the front exhaust manifold.
Bank 2 - Sensor 2
1. Disconnect the negative battery cable.
2. Disconnect the downstream heated oxygen sensor connector.
Attention! Let the engine cool before removing the oxygen sensor. Removing the oxygen sensor on a hot engine may damage the threads in the exhaust manifold.
3. Remove the lower heated oxygen sensor from the downpipe of the muffler.
Installation procedure
Important: A special anti-seize compound is used on the oxygen sensor threads. This composition consists of liquid graphite and glass beads. The graphite burns out, but the glass beads remain and make it easier to remove the sensor. New or refurbished sensors already have the compound applied to the threads. If the sensor is removed from the engine or reinstalled, be sure to apply anti-seize compound to the threads before reinstalling.
Bank 1 - Sensor 1
1. If necessary, coat the threads of the heated oxygen sensor with non-stick lubricant.
2. Using the DW170-010 oxygen sensor remover/installer, carefully install the upper heated oxygen sensor to the rear exhaust manifold. Do not remove the flexible lead from the oxygen sensor. Damage or removal of the pigtail or connector will affect the performance of the oxygen sensor. Handle the oxygen sensor with care. Do not drop the oxygen sensor.
Tighten
Tighten the heated oxygen sensor to 50 Nm (37 lb-ft).
Bank 1 - Sensor 2
1. If necessary, coat the threads of the heated oxygen sensor with non-stick lubricant.
2. Using the DW170-010 oxygen sensor remover/installer, install the lower heated oxygen sensor to the exhaust pipe of the muffler.
Tighten
Tighten the heated oxygen sensor to 50 Nm (37 lb-ft).
3. Connect the upstream heated oxygen sensor connector.
4. Connect the negative battery cable.
Bank 2 - Sensor 1
1. If necessary, coat the threads of the heated oxygen sensor with non-stick lubricant.
2. Using the DW170-010 oxygen sensor remover/installer, carefully install the upper heated oxygen sensor to the front exhaust manifold.
Tighten
Tighten the heated oxygen sensor to 50 Nm (37 lb-ft).
3. Connect the upstream heated oxygen sensor connector.
4. Connect the negative battery cable.
Bank 2 - Sensor 2
1. If necessary, coat the threads of the heated oxygen sensor with non-stick lubricant.
2. Using the DW170-010 oxygen sensor remover/installer, install the lower heated oxygen sensor to the exhaust pipe of the muffler.
Tighten
Tighten the heated oxygen sensor to 50 Nm (37 lb-ft).
3. Connect the downstream heated oxygen sensor connector.
4. Connect the negative battery cable.
