Fits Infiniti QX56 5.6L; Fits 2005-2006 Nissan Armada 5.6L; Fits 2004 Nissan Pathfinder Armada 5.6L; Fits 2004-2006 Nissan Titan 5.6L; Installation: 4pcs; 2x Air Fuel Ratio Upstream Sensor + 2x Downstream Sensor One Year Quality Guarantee Before buying, check the “Select Your Vehicle” check (Make, model, year, engine, Note,The engine and Note in particular) at the top of the link to see if your car can be used. This 4-piece oxygen sensor set by Higherbro is designed for specific use with 2004-2006 Nissan Armada, Pathfinder Armada, Titan, and Infiniti QX56 models with a 5.6L engine. The set includes 2 upstream and 2 downstream sensors, ensuring comprehensive coverage for your vehicle's emission system. Constructed from high-quality aluminum and stainless steel, these sensors are built to withstand extreme temperatures up to 9E+2 degrees Celsius. With a modern style and flange mounting type, they offer a precise and reliable air-fuel ratio measurement. A one-year quality guarantee backs this product, ensuring your satisfaction. Before purchasing, verify your vehicle's compatibility by checking the 'Select Your Vehicle' option at the top of the listing.