This 4-oxygen sensor set by Higherbro is designed for upstream and downstream use in various 2009-2014 models including Chevrolet Equinox, Impala, Traverse, GMC Terrain, Acadia, Cadillac SRX, Buick Lacrosse, and Enclave with 3.0L and 3.6L engines. Crafted from stainless steel or aluminum, these digital output-type sensors ensure durability and precision. The package includes 4 oxygen sensors, providing a modern solution for your vehicle's specific needs. A one-year quality guarantee backs this product, and it is recommended to verify your vehicle's compatibility using the 'Select Your Vehicle' feature at the top of the product link before purchasing.