NTK 24637 Oxygen Sensor - Downstream

Direct-Fit Oxygen Sensor for Downstream Use

NTK Oxygen Sensor 24637 is a direct-fit, heated oxygen sensor built for specific downstream applications. It is engineered for the 1998-2000 Mercury Villager and Nissan Quest, with OE-equivalent design for accurate replacement in Federal Emissions vehicles.

The NTK Direct Fit Oxygen Sensor line focuses on streamlined application coverage and OE-style fit, form, and function. NTK uses ceramic manufacturing expertise and extensive testing to deliver sensors that meet or exceed OE specifications for reliability and consistent performance.

Key Features

• Direct-fit oxygen sensor for specific vehicle applications
• Heated sensor design for faster operating readiness
• 4-wire configuration with a 32.75-inch wiring harness
• Threaded mounting with 18 mm thread diameter
• Downstream position coverage for listed Mercury Villager and Nissan Quest applications
• OE-equivalent design for factory-style replacement

Detailed Description

NTK part number 24637 is a heated downstream oxygen sensor designed for specific fitment in 1998-2000 Mercury Villager and 1998-2000 Nissan Quest applications. It is built with a threaded mounting style, 4-wire layout, and a 32.75-inch harness length to match the listed vehicle requirements. This sensor is intended for downstream B1S2 applications on Federal Emissions vehicles where specified.

As part of the NTK Direct Fit Oxygen Sensor line, 24637 reflects NTK’s OE-focused approach to sensor manufacturing. NTK is a major original equipment oxygen sensor supplier, and this replacement sensor is tested during production to support consistent operation and OE-level application coverage. This part cross-references Bosch 15857 and DENSO Auto Parts 234-4701 for the same application.

What This Sensor Helps Address

• Check engine light concerns related to downstream oxygen sensor faults
• Slow or inaccurate oxygen sensor response
• Emissions-related diagnostic trouble codes
• Factory-style replacement needs for aging original sensors
• Fitment issues caused by non-specific universal sensor designs

Installation Notes and Tips

Confirm the vehicle is a 1998-2000 Mercury Villager or 1998-2000 Nissan Quest with the listed downstream application before ordering. Match the 4-wire connector, threaded mounting style, and harness length to the original sensor location. For best results, inspect the exhaust threads and wiring routing before installation, and verify the sensor position is downstream as specified in the fitment data.

Quality Assurance

NTK manufactures oxygen sensors with OE application coverage and production testing to support quality and reliability that meet or exceed OE specifications. The brand’s sensor-focused engineering and ceramic manufacturing background are central to the design and consistency of this replacement part.