Bosch 13136 Oxygen Sensor - Downstream or Upstream

Bosch Oxygen Sensor for Toyota and Lexus

Bosch 13136 is a narrow-band heated oxygen sensor built for specific Toyota and Lexus applications. It delivers air-fuel-ratio feedback to the ECU for stable closed-loop control, accurate combustion management, and lower emissions across changing operating conditions.

Compatible With Toyota Tundra, Toyota Tacoma, Toyota 4Runner, Toyota T100, Toyota Previa, Toyota Land Cruiser, and Lexus LX450 applications, this Bosch Engineered Oxygen Sensor line reflects Bosch’s long OE development history and focus on fast sensor response, accurate lambda measurement, and durable operation in high-heat environments.

Key Features

• Bosch Engineered Oxygen Sensor, part number 13136
• Narrow-band heated O2 sensor for precise ECU feedback
• Specific-fit design with 4-wire harness and rectangular male connector
• Blade terminals, 18 mm thread diameter, 22 mm hex size
• Metal housing with flange mounting and included wiring harness
• Built for downstream and upstream positions where listed in fitment
• OE-focused design from Bosch’s oxygen sensor development line

Detailed Description

Bosch 13136 uses a switching-type narrow-band design to report exhaust oxygen content to the engine computer. That signal helps the ECU maintain the correct air-fuel ratio during warm-up, cruise, and load changes. The heated sensor element supports quicker closed-loop operation, while the ceramic sensing element and high-temperature materials are selected for consistent performance in demanding exhaust conditions. This Bosch Engineered Oxygen Sensor is a direct-fit style replacement for select Toyota and Lexus vehicles, including Toyota Tacoma, Toyota Tundra, Toyota 4Runner, Toyota T100, Toyota Previa, Toyota Land Cruiser, and Lexus LX450 applications.

This part cross-references Bosch 13136 for the same application.

What It Helps Fix

• 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 operation
• Failed emissions inspection tied to sensor output issues
• Rough idle, hesitation, or unstable fuel control from a worn sensor

Installation Notes and Tips

Verify the sensor position before installation, since fitment includes both upstream and downstream locations depending on vehicle and emission package. Confirm the connector shape, 4-wire configuration, and 18 mm thread size match the original sensor. Use the listed vehicle fitment for the exact year, make, model, and position, including Toyota 4Runner, Tacoma, and Tundra applications with the noted California or non-California emission system details.

Quality Assurance

Bosch has decades of OE oxygen sensor development behind this product line, including early thimble-style sensors and later planar narrow-band designs. Bosch 13136 is built to OE-oriented standards for accurate signal output, heater control, and durability in high-temperature exhaust service.