O2 Oxygen Sensor Upstream Downstream for Infiniti G37 M37 (2011-2013) 3.7L

Direct-Fit 4-Piece Oxygen Sensor Kit for 2011-2013 Infiniti G37, M37 (V36 / CV36 / Y51)

What it Does: The complete 4-piece oxygen sensor kit monitors pre- and post-catalytic exhaust gas composition on the 2011-2013 Infiniti G37 and M37 to maintain target air-fuel ratios and eliminate fuel-trim diagnostic trouble codes.

The Stock Infiniti G37,M37 Sensor Degradation

The factory planar oxygen sensors on high-revving VQ37VHR platforms endure extreme thermal cycling, carbon soot buildup, and blow-by contamination. Past 80,000 miles, internal ceramic heater elements deteriorate, causing sluggish switching frequency across stoichiometric thresholds. This degradation forces erratic short- and long-term fuel trim adjustments, triggering check engine warnings (DTCs P0130-P0161, P0420, P0430), degraded fuel economy, rough idle, and unburned hydrocarbon wash into the catalytic converters.

The Engineering Solution

This matched upstream air-fuel ratio and downstream oxygen sensor set restores factory closed-loop engine management. Constructed with dual laser-welded stainless steel protective shielding, high-grade ceramic sensing elements, and integrated rapid-heating coils, these sensors deliver instantaneous feedback to the ECM. Direct-fit weather-pack terminal connectors and OE-length high-temperature harness sleeves eliminate the need for wire cutting or splicing, maintaining factory resistance specs and signal fidelity equivalent to OEM parts 22693-1MR0A and 234-9135.

What's Included

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

Technical Specifications

Compatibility

• 2011-2013 Infiniti G37 (Sedan, Coupe, Convertible) 3.7L V6
• 2011-2013 Infiniti M37 (Base, X) 3.7L V6

Frequently Asked Questions & Fitment Warnings

Does this fit the V36 / CV36 / Y51 G37, M37?

Yes, this is a direct fit for the 2011-2013 Infiniti G37, M37 equipped with the VQ37VHR 3.7L engine. Confirm your vehicle has the 3.7L V6; this set is not compatible with 2.5L, 3.5L Hybrid, or 5.6L V8 variants.

Do I need to reset ECU fuel trims after installing these sensors?

Yes, clearing existing DTCs and performing an ECU reset or throttle relearn allows the ECM to clear stored fuel trim compensations and baseline new sensor signals immediately.

The Infiniti Calibration Standard

Infiniti's VVEL-equipped V6 engines rely heavily on fast-responding wideband data to maintain sharp throttle delivery and clean power. Replacing the full upstream and downstream sensor array simultaneously preserves balanced bank-to-bank fueling, protecting your catalytic converters and ensuring maximum engine output.