NTK 24687 Oxygen Sensor - Downstream Rear

Direct Fit Oxygen Sensor for Toyota Sienna

NTK Direct Fit Oxygen Sensor 24687 is a heated, specific-fit replacement built for downstream rear applications. It is engineered for 2004-2010 Toyota Sienna and 2015-2016 Toyota Sienna models, with original equipment equivalent design for direct replacement service.

Key Features

• Specific-fit oxygen sensor for direct replacement
• Heated sensor design for faster operating response
• 4-wire configuration with 26.5-inch wiring harness
• 18 mm threaded mounting type
• Downstream rear placement for Toyota Sienna applications
• NTK part number 24687

Product Details

NTK 24687 is part of the Direct Fit Oxygen Sensor line, a product line focused on OE-style replacement coverage and application-specific fitment. NTK uses ceramic sensor technology developed from raw material through finished product control, and each sensor is manufactured and tested to meet or exceed OE specifications. For drivers servicing a Toyota Sienna oxygen sensor replacement, this unit supports downstream rear monitoring on the listed model years.

This part cross-references Bosch (e.g., 15620, 15683) for the same application.

Common Issues It Can Address

• Check engine light related to downstream oxygen sensor faults
• Incorrect oxygen sensor signal readings
• Emissions system fault codes tied to rear sensor performance
• Rough emissions monitoring after sensor aging or contamination
• OE-style replacement needs for a Toyota Sienna downstream rear oxygen sensor

Installation Notes and Tips

Verify the connector, wire count, thread diameter, and downstream rear location before installation. This NTK oxygen sensor uses a threaded mounting type and a 4-wire heated design, so confirm the harness routing and sensor position on the vehicle before replacement. For 2004-2010 Toyota Sienna and 2015-2016 Toyota Sienna applications, match the original sensor location and connector style to ensure proper installation.

Quality Assurance

NTK is a major original equipment oxygen sensor supplier and manufacturer, and this sensor is extensively tested during production to support OE-level fit, form, and function. The Direct Fit Oxygen Sensor line is built to provide application-specific coverage for import and domestic vehicles, including Toyota Sienna fitments.