Oxygen Sensor Kit 4-Pack compatible with Infiniti M56, Q70, QX56, QX80
This 4-piece oxygen sensor kit includes two upstream and two downstream sensors featuring durable stainless steel housings. The sensors are pre-coated with anti-seize lubricant for a more efficient installation process.
Key facts
- Part type
- Oxygen Sensor
- Included
- 4-pack
- Type
- Aftermarket replacement
Compatibility matrix
Only models verified by our team are listed| Parts for | Model | This part |
|---|---|---|
| Infiniti | Infiniti M56 | Fits |
| Infiniti QX56 | Fits | |
| Infiniti Q70 | Fits | |
| Infiniti QX80 | Fits |
Only the models listed above have a confirmed catalog fit. If yours is absent, compatibility is unknown, not ruled out. Compare the exact model identifier and any published dimensions or connectors before ordering.
Where to find your model number
- Infiniti: Use your 17-character VIN. It's on the driver-side dashboard at the base of the windshield and on the driver's door jamb sticker. The year is in the 10th character. Also check your registration or the owner's manual.
General manufacturer guidance: exact label position can vary by model.
Oxygen Sensor specifications
- Material
- Metal
- Upstream Sensor
- 5 Wires (234-5095)
- Downstream Sensor
- 4 Wires (234-4381)
Installation guide - Replacing an engine or wheel sensor
General guidance for this part type - always follow your device manual- Socket set (oxygen sensors need an O2 sensor socket)
- Penetrating oil
- OBD2 scanner
- If the same code returns, check the connector and wiring before suspecting the new sensor.
- 1Make it safe. Engine off and cool (exhaust parts stay hot for a long time). Raise the car on axle stands if the sensor is underneath.
- 2Follow the wire. Trace the sensor's wire to its connector, unplug it and unclip the wire from its holders, noting the route.
- 3Remove the old sensor. Soak rusty threads with penetrating oil first. Oxygen sensors unscrew with the O2 socket; wheel speed and crank sensors usually have one bolt and twist out. Clean rust from the mounting hole.
- 4Fit the new sensor. Keep anti-seize off an oxygen sensor's tip (new ones often come pre-coated on the threads). Lightly oil an O-ring, seat the sensor fully and route the wire through the original clips, away from hot or moving parts.
- 5Clear codes and test. Reconnect, clear the fault codes with an OBD2 scanner and drive to check the warning light stays off.
This is general guidance for the part type, not a model-specific procedure. If the part does not fit without force, stop and recheck compatibility.
Maintenance check
Signs it's time to replace
- 01Check engine light is on with an oxygen sensor code
- 02Fuel economy drops
- 03Rough idle or hesitation
- 04Failed emissions test
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12 month warranty on every part
Every part we sell is covered for 12 months from delivery. If it fails in normal use, we replace it or refund you , claim it straight from your order page.
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Questions & answers
+Which models does this oxygen sensor fit?
Our team verified it for Infiniti M56, Infiniti QX56, Infiniti Q70, Infiniti QX80. The full list is in the compatibility table above.
+How do I make sure it fits my exact model?
Find the model number on your vehicle registration or VIN and compare it with the table above. Our fit guarantee covers verified models.
+What's in the box?
Pack size: 4-pack, as listed for this part. Check the photos and specifications for the exact contents.
+What is the oxygen sensor made of?
Listed material: Metal.
+Is it hard to install?
Install difficulty: Advanced · mechanical experience needed. Step by step instructions are on this page.
+How fast will it arrive?
This part is in stock in the USA: delivery within 3 to 8 business days, free shipping in the US.
+Is there a warranty?
Yes, a 12-month warranty is included, and you can extend it at checkout. Returns are accepted within 30 days.