Bosch 15247 Oxygen Sensor - Downstream, Downstream Right or Upstream

Bosch Validated Oxygen Sensor 15247

Bosch Validated Oxygen Sensor 15247 is a specific-fit, narrow-band heated O2 sensor built for precise air-fuel-ratio feedback to the ECU. It supports stable combustion control and emissions management for Toyota, Lexus, and Supra applications that call for a threaded, 4-wire replacement sensor.

Key Features

• Specific-fit oxygen sensor for direct application matching
• Narrow-band heated design for faster closed-loop operation
• 4-wire configuration with blade terminals and rectangular connector
• Threaded mounting with 18 mm thread diameter and 22 mm hex size
• Metal housing and high-temperature-resistant construction for demanding exhaust conditions
• Wiring harness included with 15.2 in harness length
• Overall length: 18.9 in; sealing surface to connector end: 17.7 in

Product Details

Bosch 15247 uses a switching-type narrow-band design to send accurate oxygen content data to the engine control unit, helping the system maintain the correct air-fuel ratio during warm-up, cruise, and closed-loop operation. Bosch’s Validated Oxygen Sensor line draws on decades of OE development, including planar sensor technology and optimized heater control for quicker light-off and consistent signal response under heat and vibration. This part number is a direct replacement choice for vehicles that require a downstream right or upstream sensor depending on application, including Toyota Tundra, Toyota Tacoma, Toyota Sequoia, Lexus GS300, Lexus SC300, and Toyota Supra.

This part cross-references Bosch Validated Oxygen Sensor applications with 894650C190 and 8946504280 for the same application.

What It Helps Address

• Check engine light related to oxygen sensor performance
• Rich or lean fuel trim conditions caused by inaccurate O2 feedback
• Slow sensor response during closed-loop transition
• Emissions test failures tied to aging upstream or downstream sensors
• Rough idle or drivability issues linked to faulty air-fuel ratio data

Installation Notes

Verify the connector shape, wire count, thread size, and sensor position before installation. This Bosch 15247 is a threaded, heated narrow-band sensor with a male rectangular connector and 4 male blade terminals. Confirm the vehicle-specific location shown in the fitment data, such as downstream right on Toyota Tundra, Toyota Sequoia, or downstream on Toyota Tacoma, and upstream on Lexus GS300, Lexus SC300, and Toyota Supra. Use proper oxygen sensor service tools to avoid damaging the housing or exhaust threads.

Quality Assurance

Bosch has more than five decades of OE oxygen sensor development and supplies validated replacement sensors built to OE-proven standards for aftermarket service.