Bosch 13735 Oxygen Sensor - Upstream Right

Bosch Wideband O2 Sensor for Toyota and Lexus

Bosch Validated Oxygen Sensor 13735 is a specific-fit wideband air-fuel ratio sensor for select Toyota and Lexus applications. It provides the ECU with continuous, high-resolution air-fuel data for precise mixture control, stable drivability, and emissions management.

Key Features

• Wideband A/F oxygen sensor for continuous lambda measurement
• Heated design for faster sensor warm-up and stable operation
• Specific-fit replacement with 4-wire, blade-terminal configuration
• Square connector with male connector and terminal ends
• Threaded mounting with 18 mm thread diameter and 22 mm hex size
• Wiring harness included with an 8.8 in harness length
• Metal housing and robust ceramic sensor construction

Product Details

Bosch 13735 is part of the Bosch Validated Oxygen Sensor line, built as a standard replacement for vehicles that require a wideband upstream sensor. Bosch pioneered the planar pump-cell wideband design used in modern engine management, and this sensor reflects that OE-focused engineering approach. It is a direct-fit option for applications such as the 2006-2012 Toyota RAV4 upstream right, the 2011-2012 Lexus RX350 upstream right, the 2002-2003 Toyota Camry upstream right, and the 2002-2003 Lexus ES300 upstream right. This part cross-references Toyota/Lexus OE numbers 894670E030 and 894670R020 for the same application.

What This Sensor Helps Address

• Check engine light related to air-fuel ratio sensor performance
• Incorrect fuel trim readings from a failing upstream sensor
• Rough idle, hesitation, or inconsistent throttle response
• Reduced fuel economy caused by inaccurate mixture feedback
• Emissions test failures tied to sensor response or heater issues

Installation Notes and Tips

Install Bosch 13735 in the upstream right position only where listed in the fitment data. Confirm the connector shape, wire count, thread size, and harness length before installation. Because this is a threaded wideband sensor, use the correct oxygen sensor socket and follow the vehicle service procedure for torque and connector routing. For fitment, this sensor fits 2006-2012 Toyota RAV4, upstream right; fits 2011-2012 Lexus RX350, upstream right; fits 2002-2003 Toyota Camry, upstream right; and fits 2002-2003 Lexus ES300, upstream right.

Quality Assurance

Bosch draws on more than five decades of OE oxygen sensor development, and the Validated Oxygen Sensor line is built to match the performance expectations of modern engine management systems. Bosch 13735 is engineered for accurate signal response, reliable heater control, and durable operation under repeated thermal cycling.