O2 Oxygen Sensor Upstream Downstream for Nissan Titan Pathfinder (2008-2012) 5.6L

Direct-Fit Upstream & Downstream O2 Sensor Kit for 2008-2012 Nissan Titan & Pathfinder (A60 / R51)

What it Does: The O2 Oxygen Sensor Kit restores precise closed-loop air-fuel ratio monitoring on the 2008-2012 Titan and Pathfinder to eliminate rich/lean diagnostic trouble codes and recover lost fuel economy.

The Stock Nissan Titan & Pathfinder Sensor Degradation

Exhaust gas thermal cycling, sulfur deposits, and oil blow-by degrade the factory zirconia sensing element inside the OEM sensors over time. On the VK56DE platform, aging sensors develop slow response rates and heater circuit failures, triggering fault codes like P0138, P0158, or P0420. Lagging voltage switching tricks the ECM into running rich trim corrections, which fouls spark plugs, over-fuels the cylinders, and accelerates premature catalytic converter failure under heavy towing loads.

The Engineering Solution

This 4-piece sensor pack replaces both upstream air-fuel ratio sensors and downstream heated oxygen sensors simultaneously to synchronize signal feedback across Bank 1 and Bank 2. Built with planar ceramic elements and fast-acting integrated heaters, these units reach operating temperature within seconds of cold-cranking. Double-laser-welded 304 stainless steel exterior shells prevent moisture contamination, while OE-spec harness lengths and factory-pinned weatherproof terminal blocks plug directly into the engine wiring harness without splicing.

What's Included

• 2x Upstream Oxygen Sensors (Bank 1 & Bank 2 Sensor 1)
• 2x Downstream Oxygen Sensors (Bank 1 & Bank 2 Sensor 2)

Technical Specifications

Compatibility

• 2008-2012 Nissan Titan 5.6L V8 (Chassis: A60)
• 2008-2012 Nissan Pathfinder 5.6L V8 (Chassis: R51)

Frequently Asked Questions & Fitment Warnings

Does this fit the A60 Titan & R51 Pathfinder?

Yes, this is a direct fit for the 2008-2012 Nissan Titan and Pathfinder equipped with the 5.6L VK56DE engine; it does not fit 4.0L V6 Pathfinder models.

Should anti-seize compound be applied to the sensor threads prior to installation?

Direct-fit sensors typically come with anti-seize pre-applied, but if dry, apply a minimal amount of high-temp sensor-safe anti-seize exclusively to the threads, keeping the probe tip clean.

The Nissan Endurance Standard

Engineered to handle high-demand towing and severe off-road vibration, this sensor set maintains exact fuel trims across the VK56DE platform to protect your exhaust catalysts and restore factory torque.