Bosch 13441 Oxygen Sensor

Bosch Oxygen Sensor for Toyota and Lexus

Bosch 13441 is a specific-fit, narrow-band heated oxygen sensor for select Toyota and Lexus applications. It provides the ECU with air-fuel-ratio feedback for stable closed-loop operation, accurate fuel control, and lower emissions across changing engine conditions.

Built under the Bosch Engineered Oxygen Sensor line, this part reflects Bosch’s long OE development history in oxygen sensing technology. The design uses a ceramic sensing element, optimized heater control, and high-temperature materials for consistent signal response in demanding exhaust environments.

Key Features

• Part number: 13441
• Bosch Engineered Oxygen Sensor line
• Narrow-band heated oxygen sensor
• Specific fit for confirmed Toyota and Lexus applications
• 4-wire design with blade terminals
• Rectangle male connector
• Threaded mounting, 18 mm thread diameter
• 22 mm hex size
• Wiring harness included
• Steel finish with metal housing

Detailed Description

Bosch 13441 is an OE-style replacement oxygen sensor for vehicles that use a narrow-band heated sensor to monitor exhaust oxygen content. It supports precise feedback to the engine control unit so the system can maintain the correct air-fuel ratio during normal driving, warm-up, and closed-loop operation. This helps keep combustion control stable and emissions in check.

Compatible With select Toyota Land Cruiser, 4Runner, FJ Cruiser, Sequoia, Tundra, and Lexus LX570, GX460, GX470, LS430, LS400, GS430, GS400, SC430, and SC400 applications, depending on position. Common fitment locations include downstream right, downstream left, upstream left, upstream right, upstream, and downstream. This part cross-references Toyota/Lexus OE numbers such as 894650C140 and 894650C150 for the same application.

What It Helps Address

• Check engine light related to oxygen sensor performance
• Incorrect air-fuel ratio feedback to the ECU
• Rough idle or unstable fuel control after sensor aging
• Slow sensor response during closed-loop operation
• Emissions test failures caused by a worn O2 sensor

Installation Notes and Tips

Verify the exact year, model, and sensor position before ordering. Bosch 13441 uses a threaded 18 mm mounting style with a 4-wire harness and rectangular male connector, so connector shape and wire routing should match the original sensor. For best results, inspect the exhaust bung threads and wiring path before installation, and confirm the downstream right, downstream left, upstream left, upstream right, upstream, or downstream location listed for your vehicle.

Fits 2021 Toyota Land Cruiser, downstream right; 2013-2020 Toyota Land Cruiser, downstream right; 2008-2011 Toyota Land Cruiser, downstream right; 2013-2019 Lexus LX570, downstream right; 2008-2011 Lexus LX570, downstream right; 2010-2019 Toyota 4Runner, downstream right; 2008-2015 Lexus LS600h, downstream left; 2010-2014 Toyota FJ Cruiser, downstream right; 2013 Lexus GX460, downstream right; 2010-2012 Lexus GX460, downstream right; 2002-2010 Lexus SC430, upstream left; 2010 Toyota 4Runner, downstream; 2001-2007 Lexus GS430, upstream left; 2001-2006 Lexus LS430, upstream left; 2005 Lexus LX470, upstream; 2005 Toyota Land Cruiser, upstream; 2003-2004 Lexus GX470, upstream; 1998-2004 Lexus LX470, upstream; 2003-2004 Toyota 4Runner, upstream; 1998-2004 Toyota Land Cruiser, upstream; 2001-2004 Toyota Sequoia, upstream left; 2001-2004 Toyota Sequoia, upstream right; 2000-2004 Toyota Tundra, upstream left; 2000-2004 Toyota Tundra, upstream right; 1998-2000 Lexus GS400, upstream; 1995-2000 Lexus LS400, upstream; 1996-2000 Lexus SC400, upstream.

Quality Assurance

Bosch backs this oxygen sensor with OE development experience spanning more than five decades. The Bosch Engineered Oxygen Sensor line is built to deliver consistent signal accuracy, durable heater performance, and dependable operation in high-heat, high-vibration exhaust environments.