NTK 24577 Oxygen Sensor - Downstream

Direct Fit Oxygen Sensor

NTK 24577 is a direct fit heated oxygen sensor built for specific applications with a threaded mounting design and a 4-wire configuration. It is engineered for downstream use and matches the original equipment equivalent design called out in the fitment data.

NTK 24577 is part of the Direct Fit Oxygen Sensor line, which focuses on application-specific coverage and OE-style replacement characteristics. For buyers searching for a Mazda Protege oxygen sensor or a Kia Sephia downstream oxygen sensor, this part number provides a targeted replacement path.

Key Features

• Heated oxygen sensor for faster operating response.
• Specific-fit design for direct replacement applications.
• Threaded mounting type with 18 mm thread diameter.
• 4-wire construction with 14-inch harness length.
• Downstream application coverage for emission control service.

Detailed Description

NTK 24577 is an emission control oxygen sensor designed for specific-fit replacement where the original sensor uses a threaded, heated, 4-wire layout. The direct fit format supports accurate installation on covered applications and helps maintain proper exhaust feedback for the engine management system. This part number is listed for 1995-1998 Mazda Protege and 1996-1997 Kia Sephia downstream positions, making it a relevant choice for Mazda Protege and Kia Sephia oxygen sensor replacement searches.

NTK is known for original equipment oxygen sensor manufacturing, and this part reflects that focus through OE-style fit, form, and function. The 24577 designation is also useful when cross-checking catalog listings for the same application.

What It Is Used For

• Replacing a worn or slow-responding downstream oxygen sensor.
• Addressing check engine light concerns related to oxygen sensor performance.
• Restoring exhaust feedback for fuel control and emissions monitoring.
• Replacing a damaged threaded sensor with the correct wire and harness layout.

Installation Notes and Tips

Verify the downstream position, thread diameter, wire count, and harness length before installation. Confirm the vehicle application against the fitment list for the Mazda Protege or Kia Sephia, and compare the original connector and sensor layout to NTK 24577 before removal.

Quality Assurance

NTK states that its oxygen sensors are extensively tested during manufacturing to meet or exceed OE specifications. The brand also positions itself as a major original equipment oxygen sensor supplier, supporting OE application technology and application-specific coverage.