Oxygen Sensor Set – Downstream and Upstream, 2 Pieces Upgrade or your vehicle's oxygen sensors with this quality 2piece set, designed for precise fitment and reliable performance. This set includes both downstream and upstream sensors, ensuring engine efficiency, fuel economy, and reduced emissions. Key Benefits: Direct replacement for damaged or failing sensors to restore proper engine operation Accurate airfuel ratio monitoring for improved performance and reduced fuel consumption Manufactured to match OE specifications for dependable fit, function, and durability Compatibility – Fitment 1: 2017–2020 Buick Envision 2.5L 2019 Buick Lacrosse 2.5L 2014–2017 Buick Regal 2.0L Turbocharged 2013–2015 Cadillac ATS 2.0L Turbocharged 2013–2016 Cadillac ATS 2.5L 2014–2015 Cadillac CTS 2.0L Turbocharged 2016–2018 Cadillac CTS 6.2L Supercharged Compatibility – Fitment 2: 2019–2021 Chevrolet Blazer 2.5L 2016–2018 Chevrolet Camaro 6.2L 2017–2018 Chevrolet Camaro 6.2L Supercharged 2015–2018 Chevrolet Colorado 2.5L 2014–2019 Chevrolet Impala 2.5L 2013–2015 Chevrolet Malibu 2.0L Turbocharged and 2.5L 2016 Chevrolet Malibu Limited 2.5L 2017–2021 GMC Acadia 2.5L 2015–2018 GMC Canyon 2.5L Quality and Performance: Built with materials for long service life in demanding driving conditions Precisely manufactured using original OE data for accurate readings and seamless installation Helps maintain engine power, emission compliance, and fuel efficiency Practical Applications: 1. Ideal for routine maintenance to keep your vehicle running smoothly and within emissions standards. 2. for replacing sensors after diagnostic trouble codes indicating O2 sensor failure. 3. Valuable for restoring fuel economy and engine response in vehicles exhibiting rough idling or poor acceleration. This 2piece oxygen sensor set offers exactfit compatibility for a wide range of Buick, Cadillac, Chevrolet, and GMC models, ensuring professionalgrade reliability and a straightforward installation.