Bosch 16576 Oxygen Sensor - Upstream

Bosch Validated Oxygen Sensor for Toyota and Lexus

Bosch Validated Oxygen Sensor 16576 is a specific-fit upstream oxygen sensor for select Toyota and Lexus applications. It uses a heated, threaded design with a 4-wire harness and square male connector to deliver accurate air-fuel-ratio feedback to the ECU for stable closed-loop operation.

Built around Bosch’s long OE development history, this sensor line focuses on fast light-off, accurate lambda control, and dependable performance under heat and vibration. It is a direct replacement choice for drivers servicing a Toyota Camry upstream oxygen sensor, Toyota RAV4 upstream oxygen sensor, or Lexus ES300h upstream oxygen sensor.

Key Features

• Part number 16576 from Bosch Validated Oxygen Sensor line
• Specific-fit upstream oxygen sensor for confirmed Toyota and Lexus applications
• Heated design for quicker closed-loop operation
• 4-wire harness with square male connector and blade terminals
• Threaded mounting with 18 mm thread size and 22 mm hex
• Metal housing with high-temperature-resistant construction
• Wiring harness included

Product Details

Bosch 16576 is a narrow-band oxygen sensor engineered to provide precise feedback to the engine control unit so fuel delivery can be adjusted accurately across changing operating conditions. The Bosch Validated Oxygen Sensor line builds on Bosch’s original oxygen sensor development and later planar narrowband designs, which are known for faster sensor response and improved lambda accuracy. This makes it a practical replacement for upstream sensor service on vehicles such as the Toyota Camry, Toyota RAV4, and Lexus ES300h.

This part cross-references 8946706250 and 8946733290 for the same application.

What It Helps Address

• Check engine light related to oxygen sensor performance
• Rough idle or unstable air-fuel control
• Reduced fuel economy caused by inaccurate sensor feedback
• Emissions test failures tied to upstream sensor faults
• Slow closed-loop response after startup

Installation Notes

Install this sensor in the upstream position only where listed in the fitment data. Verify connector shape, wire count, thread size, and harness length before installation. Use the correct oxygen sensor socket for the 22 mm hex and confirm the exhaust bung threads are clean and undamaged before tightening.

Compatible With 2021-2025 Lexus ES250, upstream; 2021-2025 Lexus ES300h, upstream; 2022-2025 Lexus NX250, upstream; 2022-2025 Lexus NX350h, upstream; 2022-2025 Lexus NX450h+, upstream; 2021-2025 Toyota Camry, upstream; 2024-2025 Toyota Grand Highlander, upstream; 2020-2025 Toyota Highlander, upstream; 2021-2025 Toyota RAV4, upstream; 2021-2025 Toyota Sienna, upstream; 2019-2024 Lexus UX250h, upstream; 2021-2024 Toyota RAV4 Prime, upstream; 2021-2024 Toyota Venza, upstream; 2019-2023 Toyota Corolla, upstream; 2019-2022 Lexus UX200, upstream; 2021-2022 Toyota Avalon, upstream; 2019-2020 Lexus ES300h, upstream; 2019-2020 Toyota Avalon, upstream; 2018-2020 Toyota Camry, upstream; 2019-2020 Toyota RAV4, upstream; 2019 Toyota Camry, upstream.

Quality Assurance

Bosch backs this oxygen sensor with OE-proven engineering and more than five decades of oxygen sensor development experience. The Bosch Validated Oxygen Sensor line is built to deliver consistent performance and accurate signal control for the listed Toyota and Lexus applications.