OXYGEN SENSOR FITS NISSAN MAXIMA 250 ST-L J32 BBUJ32 2009-2011 4 DOOR 2.5 LITRE V6 24V OX842

Description

The OX842 Oxygen Sensor is listed for selected Nissan Maxima 250 ST-L J32 and BBUJ32 applications from 2009 to 2011. The supplied vehicle details specify a four-door sedan equipped with a 2.5-litre V6 engine featuring 24 valves. This replacement component is designed to support the vehicle’s engine management and exhaust monitoring systems when its specifications match the original equipment sensor.

An oxygen sensor, also known as a lambda sensor, measures the oxygen content in the exhaust gases and sends information to the engine control unit (ECU). The ECU uses this feedback, alongside information from other engine sensors, to help regulate the air-fuel mixture and manage emissions.

Over time, an oxygen sensor may become contaminated, deteriorate or develop an electrical fault. If it sends inaccurate readings or responds too slowly, the engine management system may store diagnostic trouble codes or illuminate the Check Engine Light. Replacing a sensor that has been correctly diagnosed as faulty may help restore appropriate feedback and support normal engine management operation.

The OX842 listing offers a replacement option for the specified Nissan Maxima application. However, different engine variants, production specifications and exhaust configurations can require different sensors. Before purchasing, confirm the vehicle identification number (VIN), engine code, original equipment part number and exact sensor position.

Product Specifications

• Product Name: Oxygen Sensor
• Product Code: OX842
• Vehicle Make: Nissan
• Vehicle Model: Maxima 250 ST-L
• Model Series: J32 – BBUJ32, as supplied
• Model Years: 2009–2011
• Body Style: 4-door sedan
• Engine Capacity: 2.5 litre
• Engine Configuration: V6
• Valve Configuration: 24-valve
• Product Function: Exhaust oxygen monitoring and engine management feedback
• Sensor Position: Confirm upstream or downstream application
• Electrical Connector: Must match the original sensor
• Fitment Verification: Check VIN, engine code and original equipment part number

These details reflect the supplied listing. Buyers should verify the exact vehicle and sensor application before ordering to help ensure correct fitment.

What Does an Oxygen Sensor Do?

An oxygen sensor measures the amount of oxygen remaining in the exhaust gases after combustion. It sends a signal to the ECU, which uses the information to help determine whether the air-fuel mixture is appropriate.

On a compatible petrol-powered Nissan Maxima, oxygen sensor feedback supports fuel control, engine operation and emissions monitoring. Accurate readings help the ECU respond to changing driving conditions, including engine warm-up, idling, acceleration and steady-speed cruising.

Depending on the exhaust system design, the vehicle may use multiple oxygen sensors. An upstream sensor is generally located before the catalytic converter and provides information used for air-fuel mixture control. A downstream sensor is generally positioned after the catalytic converter and helps monitor catalytic converter performance.

These sensors may differ in their electrical characteristics, heating elements, connector designs and intended functions. They should not be assumed to be interchangeable simply because they look similar.

For the Nissan Maxima J32, the correct sensor location and engine specification must be confirmed before purchase. If a vehicle uses sensors across different exhaust banks, the replacement must also match the required position.

Key Features and Benefits

• Exhaust Oxygen Monitoring: Measures oxygen levels in exhaust gases and provides feedback to the engine management system.
• Air-Fuel Mixture Support: Helps the ECU regulate fuel delivery when the sensor is correctly matched and functioning properly.
• Emissions System Assistance: Supports exhaust monitoring and catalytic converter management functions.
• Replacement for a Faulty Sensor: Offers a replacement option when diagnostic testing confirms that the existing oxygen sensor has failed.
• Nissan Maxima Application: Listed for selected J32 and BBUJ32 250 ST-L models from 2009 to 2011, subject to fitment confirmation.
• Potential Warning-Light Resolution: Replacing a confirmed faulty sensor may resolve related diagnostic trouble codes when the sensor is the underlying cause.
• Maintenance Support: Helps owners address sensor-related faults as part of appropriate engine and exhaust system maintenance.

Actual results depend on the condition of the vehicle, correct sensor selection and the cause of the original fault. A replacement oxygen sensor will not automatically resolve unrelated fuel delivery, ignition, wiring or catalytic converter problems.

Common Symptoms of a Faulty Oxygen Sensor

A worn or malfunctioning oxygen sensor may contribute to several engine management symptoms. Similar signs can result from other faults, so diagnosis is recommended before replacement.

Common warning signs include:

• Check Engine Light: The ECU may detect an abnormal sensor signal, heater circuit fault or slow sensor response.
• Increased Fuel Consumption: Incorrect sensor feedback may affect fuel mixture control and contribute to higher fuel use.
• Rough Idling: Inaccurate readings may contribute to inconsistent engine operation under certain conditions.
• Hesitation During Acceleration: Engine management problems may affect driving response.
• Increased Exhaust Emissions: Incorrect mixture control or another engine fault may cause emissions to rise.
• Failed Emissions Inspection: A sensor-related problem may affect emissions test results.
• Diagnostic Trouble Codes: A scan tool may identify codes associated with oxygen sensor signals, heater circuits or emissions monitoring.

These symptoms do not automatically confirm oxygen sensor failure. Exhaust leaks, damaged wiring, intake leaks, ignition problems, fuel pressure faults and catalytic converter issues can produce similar symptoms.

Why Correct Fitment Matters

Oxygen sensors can differ in connector shape, wire count, cable length, thread dimensions, heater specifications and signal characteristics. A sensor that physically fits may still be electrically unsuitable for the vehicle.

Before purchasing the OX842, verify:

• The vehicle’s VIN and engine code.
• The exact Nissan Maxima model and production year.
• The original equipment oxygen sensor part number.
• Whether the required sensor is upstream or downstream.
• The correct exhaust bank and sensor position, where applicable.
• The electrical connector and number of wires.
• The mounting thread, cable length and emissions specification.

Do not assume that every Nissan Maxima J32 uses the same oxygen sensor. Confirm the replacement using reliable vehicle-specific parts information.

Installation and Maintenance Recommendations

• Diagnose the Fault First: Scan the vehicle for diagnostic trouble codes and inspect sensor data where possible. Confirm that the oxygen sensor is defective.
• Allow the Exhaust to Cool: Exhaust components can become extremely hot. Ensure the vehicle is safely supported and the exhaust has cooled before beginning work.
• Compare the Replacement: Check the part number, connector, wiring and mounting dimensions against the original sensor.
• Confirm Sensor Position: Identify the correct upstream or downstream location and exhaust bank before removing the old component.
• Use Suitable Tools: Use an appropriate oxygen sensor socket to reduce the risk of damaging the sensor or nearby parts.
• Follow Manufacturer Specifications: Use the specified installation procedure and tightening torque. Apply anti-seize compound only if permitted by the sensor manufacturer’s instructions.
• Protect the Wiring: Route the cable away from hot exhaust surfaces and moving components. Avoid twisting or stretching the wires.
• Check After Installation: Clear diagnostic codes when appropriate, complete any required drive cycle and check whether the warning light returns.
• Inspect Related Components: Check for exhaust leaks, wiring damage and other faults that may have caused the original sensor problem.

If the correct sensor position or installation procedure is uncertain, consult a qualified automotive technician.

Fitment Checklist

Before ordering OX842, confirm that your vehicle matches the supplied application:

• Nissan Maxima 250 ST-L.
• J32 – BBUJ32 identification, as applicable.
• Model year 2009, 2010 or 2011.
• Four-door sedan.
• 2.5-litre V6 24-valve engine.
• Matching VIN, engine code and original equipment part number.
• Correct upstream or downstream sensor position.
• Compatible connector and emissions specification.

Conclusion

The OX842 Oxygen Sensor is listed for selected 2009–2011 Nissan Maxima 250 ST-L J32-BBUJ32 applications with a four-door body and 2.5-litre V6 24-valve engine. This component helps monitor exhaust oxygen levels and supplies feedback used by the engine management system to support fuel control and emissions monitoring.

When the original sensor has been confirmed faulty, a correctly matched replacement may help restore appropriate sensor feedback and address related engine management issues. Before ordering, verify the VIN, engine code, original equipment part number, exhaust bank and sensor position to help ensure compatibility with your Nissan Maxima.