Description

This Bosch Upstream Oxygen (O₂) Sensor is engineered to meet or exceed OEM specifications for select GM vehicles from 2011 to 2021 , including Encore, ELR, Cruze, Sonic, Trax, and Volt models. Installed before the catalytic converter, the upstream oxygen sensor plays a critical role in monitoring exhaust oxygen levels and delivering accurate data to the engine control module. Designed with Bosch’s advanced sensing technology, this sensor provides fast response times, consistent signal accuracy, and long-term reliability. Replacing a faulty upstream oxygen sensor helps restore fuel efficiency, improve throttle response, reduce emissions, and eliminate check engine light issues. The direct-fit, plug-and-play design ensures easy installation without wiring modifications. Key Features & Benefits Genuine Bosch oxygen sensor Upstream (pre-catalytic converter) position OEM-grade accuracy and reliability Improves fuel economy and engine performance Helps reduce harmful exhaust emissions Prevents check engine light and drivability issues Direct-fit, plug-and-play installation Engine Compatibility Gasoline engines (engine-specific fitment applies) Compatible with multiple 1.4L / 1.5L / 1.8L GM engine variants (Verify engine and position before purchase) Vehicle Applications Buick Encore (2013–2021) Cadillac ELR (2014–2016) Chevrolet Cruze (2011–2021) Chevrolet Sonic (2012–2020) Chevrolet Trax (2013–2021) Chevrolet Volt (2011–2019) Frequently Asked Questions Q1: Is this an upstream or downstream oxygen sensor? A: This is an upstream oxygen sensor installed before the catalytic converter. Q2: Is this a genuine Bosch product? A: Yes, this is a genuine Bosch oxygen sensor manufactured to OEM standards. Q3: What symptoms indicate a bad upstream O₂ sensor? A: Poor fuel economy, rough idling, reduced engine performance, and a check engine light. Q4: Does this sensor require programming? A: No programming is required. It is a direct plug-and-play replacement. Q5: Will this fit all engine sizes listed? A: Fitment depends on engine type and sensor position. Always verify compatibility before purchase.