NTK 21079 Oxygen Sensor - Upstream Left or Upstream Right

Direct Fit Oxygen Sensor for Import and Domestic Applications

NTK 21079 is a direct fit heated oxygen sensor with a specific-fit design for select applications. It uses a threaded mounting style, a 4-wire layout, and a 12.25-inch harness for a factory-style replacement on supported vehicles.

Key Features

• Direct fit oxygen sensor for specific applications
• Heated sensor design for faster operating response
• 4-wire configuration with 12.25-inch wiring harness
• Threaded mounting with 18.000 thread diameter
• NTK 21079 is part of the Direct Fit Oxygen Sensor line

Detailed Description

NTK 21079 is built for select Cadillac CT6, Cadillac ATS, Cadillac CTS, and Chevrolet Camaro applications with upstream right and upstream left fitments listed in the catalog data. As a direct fit oxygen sensor, it is specified for exact application matching rather than universal use, which helps maintain the original sensor layout and connection style. NTK 21079 is also cross-referenced to 12666672 for the same application.

NTK develops oxygen sensors with OE-focused engineering and manufacturing controls, using ceramic expertise and extensive testing to support fit, form, and function. The Direct Fit Oxygen Sensor line is organized to simplify application coverage while keeping the replacement process aligned with OE-style requirements. This part number, 21079, is intended for buyers seeking a specific-fit oxygen sensor for supported Cadillac and Chevrolet platforms.

What It Is Used For

• Replacing a worn or slow-responding oxygen sensor
• Restoring accurate exhaust gas feedback to the engine control system
• Addressing sensor fault codes related to oxygen sensor performance
• Correcting drivability issues tied to improper air-fuel monitoring
• Replacing a damaged threaded sensor with the correct harness and wire layout

Installation Notes and Tips

Verify the upstream right or upstream left position, bank designation, and connector routing before installation. Confirm thread diameter and harness length against the original sensor to ensure proper fitment. Use the vehicle-specific application data for Cadillac CT6, Cadillac ATS, Cadillac CTS, and Chevrolet Camaro to match the correct sensor location.

Quality Assurance

NTK states that its oxygen sensors are extensively tested during manufacturing and built to meet or exceed OE specifications. The brand is part of the NGK family of products and is recognized as a major original equipment oxygen sensor supplier.