A-Premium O2 Oxygen Sensor 2-Pack for Chevrolet, GMC & Buick — 4‑Pin Heated Threaded Replacement

A-Premium 2-Pack O2 Oxygen Sensor is a pair of 4-pin heated, threaded replacement oxygen sensors designed to restore accurate exhaust oxygen readings on select Chevrolet, GMC and Buick 1.2L–1.5L and 1.4L engines.

These replacement sensors match the electrical and mounting style of many GM applications so your engine control module receives the proper air-fuel feedback. Each sensor is a heated, male-threaded unit with four wires and comes boxed; models are cross-referenced to part number 250-241188 (250241188). The set is sold as two independent sensors so you can replace upstream and downstream units or keep a spare on hand.

Which vehicles and engine types does this 2-pack fit?

These sensors are tailored for specific Chevy, GMC and Buick models with 4-pin oxygen sensor connectors. Fitment includes both upstream and downstream positions for many 1.4L and 1.5L four-cylinder engines and downstream-only fitments for select 1.2L and 1.5L engines—confirm plug style and model year before ordering.

• Buick Encore: 2016–2019, 2021–2022 L4 1.4L (upstream & downstream)
• Chevrolet Cruze: 2016–2019 L4 1.4L (L/LT/LS/Premier)
• Chevrolet Equinox & Malibu: 2018–2021 Equinox 1.5L; 2016–2021 Malibu 1.5L
• Chevrolet Spark & Trax: Spark 2016–2022 1.4L; Trax 2021 1.4L
• GMC Terrain: 2018–2021 L4 1.5L (SL/SLE/SLT)
• Downstream only: Buick Encore GX 2020–2022 1.2L; Chevy Trailblazer 2021–2022 1.2L; Volt 2018–2019 1.5L

How does the sensor’s design affect installation and performance?

These are heated, threaded sensors with a male connector and four conductors, which helps them reach operating temperature quickly and provide stable readings to the vehicle’s control module. The threaded mounting makes them a direct-style replacement when the OEM sensor uses the same thread size and plug configuration.

• Heated element for faster warm-up and reliable readings at idle
• Threaded mounting for standard O2 sensor ports
• 4-pin male connector—verify vehicle uses 4-pin sensor
• Boxed packaging for protection in shipping and storage

What reference and specification details should I check before buying?

Match the vehicle’s required sensor type, connector pin count and position (upstream vs downstream) to avoid fitment problems. This A-Premium product corresponds to reference numbers 250-241188 and 250241188; double-check the OEM part number and the vehicle’s wire-count to confirm compatibility.

• Reference numbers: 250-241188, 250241188
• Wire quantity: 4 (heated sensor wiring)
• Sensor type: heated, male connector
• Mounting: threaded; packaging: box

Buyers receive a one-year unlimited-mileage guarantee from A-Premium, covering manufacturing defects so you can install with confidence. The two-sensor pack is useful for replacing both banks or keeping a backup sensor on hand.

Who is this for: This 2-pack suits DIY mechanics and independent shops working on compatible Chevrolet, GMC and Buick small-displacement engines that require a 4-pin heated, threaded O2 sensor. It’s ideal when you need a direct-style replacement for upstream and downstream positions or when replacing a failing sensor and wanting a matched spare.