Bosch 13104 Oxygen Sensor

Bosch Oxygen Sensor for Toyota and Lexus

Bosch 13104 is a narrow-band heated oxygen sensor built for specific Toyota and Lexus applications, including Land Cruiser, LX470, Sequoia, Tundra, 4Runner, Tacoma, T100, and Pickup models. It provides direct air-fuel-ratio feedback to the ECU for stable closed-loop control and emissions monitoring.

Key Features

• Bosch Engineered Oxygen Sensor line with OE-focused design and calibration
• Narrow-band heated oxygen sensor for faster warm-up and closed-loop operation
• Specific fit replacement with 4-wire harness and rectangular male connector
• Flange mounting style with 18 mm thread diameter and 22 mm hex size
• Metal housing built for high-temperature and vibration exposure
• Wiring harness included for direct replacement on listed applications
• Part number 13104 for streamlined lookup and ordering

Product Details

Bosch 13104 uses a switching-type narrow-band design to measure oxygen content in the exhaust stream and send accurate feedback to the engine control unit. Bosch developed this sensor family from its early OE oxygen sensor work and later planar narrowband technology, focusing on quicker light-off, improved lambda accuracy, and stable operation under heat and vibration. This part number 13104 is a direct-fit replacement for select Toyota and Lexus vehicles, including 2005 Lexus LX470 and Toyota Land Cruiser downstream applications, plus multiple 1993-2004 Toyota truck and SUV positions. This part cross-references Denso 8946509020 and 8946509070 for the same application.

What It Helps Address

• Check engine light caused by oxygen sensor signal faults
• Rough idle or unstable air-fuel control from a worn sensor
• Reduced fuel economy from inaccurate exhaust feedback
• Emissions test failure related to sensor response or heater issues
• Delayed closed-loop operation after cold start

Installation Notes

Verify the exact year, engine, and sensor position before installation. This Bosch 13104 is listed for downstream, upstream, downstream left, and downstream right positions depending on the vehicle, including Toyota 4Runner, Tacoma, Tundra, Sequoia, T100, Pickup, and Lexus LX470 or Toyota Land Cruiser applications. Match the connector shape, wire count, thread size, and mounting style to the original sensor before removal. Use proper oxygen sensor service tools and inspect the exhaust bung threads and wiring routing during replacement.

Quality Assurance

Bosch backs this oxygen sensor with more than five decades of OE development in oxygen sensing technology. The Bosch Engineered Oxygen Sensor line is built to OE-proven standards for accuracy, durability, and consistent performance in aftermarket service.

Compatible With

• Fits 2005 Lexus LX470, downstream
• Fits 1998-2004 Lexus LX470, downstream
• Fits 2005 Toyota Land Cruiser, downstream
• Fits 1998-2004 Toyota Land Cruiser, downstream
• Fits 2001-2004 Toyota Sequoia, downstream left
• Fits 2001-2004 Toyota Sequoia, downstream right
• Fits 2000-2004 Toyota Tundra, downstream right
• Fits 2000-2002 Toyota Tundra, downstream
• Fits 2000-2002 Toyota Tundra, downstream left
• Fits 1999-2000 Toyota 4Runner, upstream
• Fits 1999-2000 Toyota 4Runner, downstream
• Fits 1996-2000 Toyota 4Runner, downstream
• Fits 1993-1994 Toyota 4Runner, downstream
• Fits 2000 Toyota Tacoma, downstream
• Fits 1995-2000 Toyota Tacoma, upstream
• Fits 2000 Toyota Tacoma, upstream
• Fits 1996-1999 Toyota 4Runner, upstream
• Fits 1999 Toyota Tacoma, upstream
• Fits 1995-1999 Toyota Tacoma, downstream
• Fits 1995-1998 Toyota T100, downstream
• Fits 1995-1998 Toyota T100, upstream
• Fits 1995 Toyota 4Runner, downstream
• Fits 1993-1995 Toyota Pickup, downstream
• Fits 1994-1995 Toyota Pickup, downstream