Infiniti QX56 / QX80 O2 Sensor Set of 4, 234-5095 / 234-4381, 5.6L V8

This Infiniti QX80 O2 sensor set includes all four oxygen sensors for the 5.6 litre V8: two upstream 234-5095 and two downstream 234-4381. It fits the QX56, QX80, M56 and Q70 with the 5.6L. Doing all four at once is the sensible approach on a high-mileage V8.

Specifications

• Upstream: 234-5095, 5 wires (x2)
• Downstream: 234-4381, 4 wires (x2)
• OE numbers: 22693-1LA0C, 22693-1MC0A, 22693-1MC0B, 22690-ED000, 226A0-EN21A
• Housing: stainless steel, threads pre-coated with anti-seize
• Package: 4 oxygen sensors

Application

• Infiniti M56 5.6L V8, 2011-2013
• Infiniti Q70 5.6L V8, 2014
• Infiniti QX56 5.6L V8, 2011-2013
• Infiniti QX80 5.6L V8, 2014

Fitting

On the V8 there is one upstream and one downstream sensor on each bank. Upstream sensors can be tight to reach, so a slotted O2 sensor socket and a long extension help. For more, see the oxygen sensor article on Wikipedia.

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