O2 Oxygen Sensor Upstream Downstream for Infiniti QX56 (2008-2010) 5.6L

Direct-Fit Complete Oxygen Sensor Kit for 2008-2010 Infiniti QX56 (JA60)

What it Does: The complete upstream and downstream oxygen sensor kit replaces degraded factory sensors on the 2008-2010 Infiniti QX56 to restore closed-loop fuel metering, clear diagnostic trouble codes, and optimize stoichiometric combustion efficiency.

The Stock Infiniti QX56 Sensor Degradation

Over extended heat cycles and high mileage, factory zirconium sensors on the VK56DE suffer from silica glaze accumulation, carbon fouling, and internal heater circuit failure. Sluggish switching response prevents the ECM from accurately adjusting short-term fuel trims. This thermal fatigue leads to unburned hydrocarbon wash, diminished fuel economy, rich-running conditions, and recurring catalyst efficiency DTCs like P0420 and P0430 on the JA60 platform.

The Engineering Solution

This four-sensor matched replacement kit delivers synchronized lambda signal frequency across both cylinder banks. Engineered with high-grade ceramic sensing elements and dual-layer stainless steel shields, each sensor resists severe thermal shock and exhaust gas particulate contamination. Factory-pinned pigtails eliminate wire splicing, ensuring uninterrupted millivolt signaling to the engine computer for stable idle dynamics and precise air-fuel ratio regulation.

What's Included

• 2x Upstream Oxygen Sensors (Air-Fuel Ratio Sensors)
• 2x Downstream Oxygen Sensors

Technical Specifications

Compatibility

• 2008 Infiniti QX56 Base 5.6L V8 (VK56DE)
• 2009 Infiniti QX56 Base 5.6L V8 (VK56DE)
• 2010 Infiniti QX56 Base 5.6L V8 (VK56DE)

Frequently Asked Questions & Fitment Warnings

Does this fit the JA60 QX56?

Yes, this is a direct fit for the 2008-2010 Infiniti QX56 equipped with the VK56DE 5.6L V8 engine.

Are these sensors plug-and-play or do they require wiring modifications?

These sensors feature direct-fit OE-style harness connectors and correct pigtail lengths, requiring no cutting, splicing, or ECU recalibration.

The Infiniti Heavy-Duty Standard

Engineered to endure the intense exhaust temperatures and continuous load demands of the full-size JA60 platform, these sensors maintain rapid switching speeds to protect your catalytic converters during heavy towing.