How Should You Replace and Reset the Oxygen Sensor for a 3.8L Engine on 2007 Chrysler Pacifica?

To replace the O2 sensor lower on a 3.8L Ford, always clear the PCM RAM by either disconnecting the PCM C-1 connector or the Battery's negative terminal, since Ford 3.8L ECUs learn from the O2 heater elements. Once you remove the sensor, thread an 18 mm X 1.5 + 6E tap around the threads to clear them. For original sensors, put on a sign of anti-seize material such as Loctite 771-64 on the sensor's threads, but there is no need to apply it on new sensors, as these are already coated. Apply a sensor torque of 41 Nm (30 ft. lbs.), put on the heated oxygen sensor connector and put the vehicle on the ground before placing the negative battery cable once more.

OEM 2007 Chrysler Pacifica Oxygen Sensor

Oxygen O2 Sensor

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3 Oxygen Sensors found

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2007 Chrysler Pacifica Oxygen Sensor, Front Part Number: 56029050AA
$77.38 MSRP: $114.00
You Save: $36.62 (33%)
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Product Specifications
- Other Name: Sensor - Oxygen; Oxygen Sensor, Front, Front Right, Rear, Rear Left, Rear Right; Rear Oxygen Sensor; Front Oxygen Sensor; Lower Oxygen Sensor; Sensor Oxygen
- Position: Front
- Item Weight: 0.60 Pounds
- Item Dimensions: 1.5 x 4.2 x 9.0 inches
- Condition: New
- Fitment Type: Direct Replacement
- SKU: 56029050AA
- Warranty: This genuine part is guaranteed by Mopar's factory warranty.
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Fits the following 2007 Chrysler Pacifica Submodels:
- Base, LX | 6 Cyl 3.8 L GAS
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2007 Chrysler Pacifica Oxygen Sensor, Front Driver Side Part Number: 56029049AA
$97.32 MSRP: $144.00
You Save: $46.68 (33%)
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Product Specifications
- Other Name: Sensor - Oxygen; Oxygen Sensor, Front, Front Left, Front Right, Rear, Rear Left, Rear Right; Rear Oxygen Sensor; Front Oxygen Sensor; Upper Oxygen Sensor; Lower Oxygen Sensor; Sensor Oxygen
- Position: Front Driver Side
- Item Weight: 0.50 Pounds
- Item Dimensions: 1.9 x 3.3 x 5.8 inches
- Condition: New
- Fitment Type: Direct Replacement
- SKU: 56029049AA
- Warranty: This genuine part is guaranteed by Mopar's factory warranty.
More Info
Fits the following 2007 Chrysler Pacifica Submodels:
- Base, LX, Limited, Touring | 6 Cyl 4.0 L GAS
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2007 Chrysler Pacifica Oxygen Sensor, Rear Part Number: 56029085AA
$85.52 MSRP: $127.00
You Save: $41.48 (33%)
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Product Specifications
- Other Name: Sensor - Oxygen; Oxygen Sensor, Front, Front Left, Rear; Front Oxygen Sensor; Sensor Oxygen
- Position: Rear
- Item Weight: 0.70 Pounds
- Item Dimensions: 1.1 x 1.8 x 19.9 inches
- Condition: New
- Fitment Type: Direct Replacement
- SKU: 56029085AA
- Warranty: This genuine part is guaranteed by Mopar's factory warranty.
More Info
Fits the following 2007 Chrysler Pacifica Submodels:
- Base, LX | 6 Cyl 3.8 L GAS

2007 Chrysler Pacifica Oxygen Sensor Parts and Q&A

Q: How Should You Replace and Reset the Oxygen Sensor for a 3.8L Engine on 2007 Chrysler Pacifica?
A: To replace the O2 sensor lower on a 3.8L Ford, always clear the PCM RAM by either disconnecting the PCM C-1 connector or the Battery's negative terminal, since Ford 3.8L ECUs learn from the O2 heater elements. Once you remove the sensor, thread an 18 mm X 1.5 + 6E tap around the threads to clear them. For original sensors, put on a sign of anti-seize material such as Loctite 771-64 on the sensor's threads, but there is no need to apply it on new sensors, as these are already coated. Apply a sensor torque of 41 Nm (30 ft. lbs.), put on the heated oxygen sensor connector and put the vehicle on the ground before placing the negative battery cable once more.