NTK 21569 Oxygen Sensor - Downstream Left

Direct-Fit Oxygen Sensor

NTK 21569 is a direct-fit heated oxygen sensor built for specific applications and threaded mounting. It uses a 4-wire design with a 13.7500 wiring harness length and an 18.000 thread diameter for OE-style replacement service. This sensor is engineered for import and domestic emission control systems where accurate exhaust feedback matters.

Key Features

• Heated oxygen sensor for faster operating response.
• Specific-fit design for direct replacement service.
• 4-wire configuration with threaded mounting.
• 13.7500 wiring harness length and 18.000 thread diameter.
• NTK 21569 is part of the Direct Fit Oxygen Sensor line.

Detailed Description

NTK 21569 is part of the Direct Fit Oxygen Sensor product line, which focuses on application-specific replacement parts with OE-style fit, form, and function. NTK draws on its ceramics expertise and original equipment manufacturing background to produce oxygen sensors that are extensively tested during manufacturing for quality and reliability. This part cross-references Bosch (e.g., 16017, 16132) for the same application. It is a direct replacement for emission control service on Chevrolet Camaro, Cadillac CTS, and Cadillac STS applications listed below.

What It Is Used For

• Restoring oxygen sensor signal accuracy after sensor aging or contamination.
• Addressing check engine lights related to oxygen sensor performance.
• Correcting poor fuel control caused by a faulty heated sensor.
• Replacing a damaged threaded sensor or worn harness connection.
• Supporting proper exhaust monitoring in emission control systems.

Installation Notes and Tips

Verify the connector style, thread diameter, and harness length before installation. This part is listed for downstream left placement and B2S2 application notes on the supported vehicles. Use the vehicle-specific fitment data to confirm the exact application before ordering.

Quality Assurance

NTK states that these oxygen sensors are extensively tested during manufacturing 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.