Replacement REPC960916 Upstream Oxygen Sensor Pre-Catalytic Converter - 4-Wire

The Replacement REPC960916 is a 4-wire upstream oxygen sensor designed to restore proper air/fuel ratio monitoring to your vehicle's engine management system. Positioned before the catalytic converter, this pre-cat (upstream) O2 sensor continuously samples exhaust gases and relays voltage signals to the ECU, enabling precise fuel trim adjustments for optimal combustion efficiency and emissions compliance.

This direct-fit OEM replacement sensor is engineered to match the original equipment specifications, ensuring a plug-and-play installation without the need for cutting or splicing wiring harnesses. A faulty upstream oxygen sensor commonly triggers a Check Engine Light (CEL), poor fuel economy, rough idle, and failed emissions tests — making timely replacement essential.

Key Features:

• 4-wire heated oxygen sensor (HO2S) design for faster warm-up and accurate readings across all operating temperatures
• Upstream / pre-catalytic converter mounting position (Bank 1, Sensor 1 or equivalent)
• Direct OEM replacement — no wiring modifications required
• Restores proper air/fuel mixture control and fuel efficiency
• Helps eliminate Check Engine Light codes related to O2 sensor performance
• Manufactured to meet or exceed original equipment standards

Compatible with select Chevrolet Cruze, Chevrolet Sonic, Chevrolet Trax, Chevrolet Volt, and Buick Encore model years. Always confirm fitment with your vehicle's year, make, model, and engine before ordering.