NTK 24559 Oxygen Sensor - Downstream

Direct Fit Oxygen Sensor for Tacoma

The NTK 24559 direct fit oxygen sensor is built for specific applications and engineered for accurate exhaust monitoring on select Toyota Tacoma models. With a heated, 4-wire design and OE-style flange mounting, it supports reliable downstream sensor replacement for 2000-2004 Toyota Tacoma applications.

NTK’s Direct Fit Oxygen Sensor line focuses on original equipment-style fit, form, and function. As part of the NGK family and a major OE oxygen sensor manufacturer, NTK applies ceramic manufacturing expertise and extensive production testing to deliver consistent sensor performance for import and domestic vehicles.

Key Features

• Part number: 24559
• Specific-fit oxygen sensor for direct replacement use
• Heated sensor design for faster operating response
• 4-wire configuration
• 18 mm thread diameter
• Flange mounting type
• 36.5 in. wiring harness length
• Downstream placement for listed Toyota Tacoma applications

Detailed Description

NTK 24559 is a direct fit oxygen sensor for downstream use on 2001-2004 Toyota Tacoma and on 2000 Toyota Tacoma with B1S2 California emissions OE-equivalent design. This sensor is built to match the original application layout, helping maintain proper exhaust feedback for the engine management system. If you are replacing a downstream oxygen sensor on a Toyota Tacoma, this part number 24559 provides a specific-fit solution with the correct connector style, wire count, and mounting configuration for the listed vehicles.

This part cross-references Bosch 15210 and DENSO Auto Parts 234-4189 for the same application.

What It Helps Address

• Check engine light related to downstream oxygen sensor faults
• Incorrect oxygen sensor signal readings
• Emissions test failures tied to sensor performance
• Rough fuel control caused by a worn exhaust sensor
• Replacement needs for a damaged or aging Toyota Tacoma downstream sensor

Installation Notes and Tips

Verify the vehicle year, engine/emissions configuration, and downstream sensor position before ordering. For 2001-2004 Toyota Tacoma, install at the downstream location specified for the application. For 2000 Toyota Tacoma, confirm B1S2 California emissions OE-equivalent fitment. Match the 4-wire connector, flange mount, and 18 mm thread diameter to the original sensor before installation.

Quality Assurance

NTK manufactures oxygen sensors with OE-level application coverage and tests them during production to support quality and reliability that meet or exceed original equipment specifications. The 24559 is part of NTK’s Direct Fit Oxygen Sensor line, developed for accurate fitment on listed Toyota Tacoma applications.