NTK 22514 Oxygen Sensor - Downstream or Downstream Front

Direct Fit Oxygen Sensor

NTK 22514 is a direct fit heated oxygen sensor built for specific emission-control applications. It uses a threaded mounting design and a 4-wire configuration with a 26-inch harness for a precise replacement setup.

Key Features

• Heated oxygen sensor for faster signal response
• Specific-fit design for direct replacement applications
• 4-wire construction for the correct electrical interface
• Threaded mounting type for secure installation
• 26-inch wiring harness length
• 18 mm thread diameter

Detailed Description

NTK 22514 is engineered as an OE-style oxygen sensor for Mazda emission-control service, including Mazda Protege, Mazda Protege5, and Mazda MPV applications. It is a direct fit, heated sensor with a threaded body, 4-wire layout, and 18 mm thread diameter to match the specified installation points. This part cross-references DENSO Auto Parts 234-4752 and Delphi ES20123 for the same application. NTK 22514 is built to deliver the fit, form, and function expected in specific downstream oxygen sensor applications.

What It Is Used For

• Replacing a worn or slow-responding oxygen sensor
• Restoring proper exhaust feedback for engine management
• Addressing oxygen sensor fault codes
• Correcting emissions-related drivability concerns
• Replacing a sensor with damaged threads or wiring

Installation Notes and Tips

Compatible with 1999-2003 Mazda Protege, downstream; 2002-2003 Mazda Protege5, downstream; and 2000-2001 Mazda MPV, downstream front. Verify the connector, thread size, and harness length against the original sensor before installation. Use the listed fitment notes, including California emissions and B2S2 where applicable, to confirm the correct application.

Quality Assurance

NTK is part of the NGK family of products and is a major original equipment oxygen sensor supplier. Each sensor is extensively tested during manufacturing to meet or exceed OE specifications for quality and reliability.