Bosch 13544 Oxygen Sensor - Downstream, Upstream or Upstream Right

Bosch Oxygen Sensor for Lexus and Toyota

Bosch Engineered Oxygen Sensor 13544 is a specific-fit, narrow-band heated O2 sensor built for direct replacement in select Lexus, Pontiac, and Toyota applications. It provides the ECU with precise air-fuel-ratio feedback to support stable combustion control and lower emissions across changing operating conditions.

Built with Bosch’s OE development experience, this sensor uses advanced ceramic elements, optimized heater control, and high-temperature-resistant materials for consistent signal performance in demanding exhaust environments. Bosch 13544 is a practical choice for drivers searching for a Lexus GS430 upstream right oxygen sensor, Toyota Corolla upstream oxygen sensor, or Toyota Supra downstream oxygen sensor replacement.

Key Features

• Bosch Engineered Oxygen Sensor, part number 13544
• Narrow-band heated oxygen sensor with threaded mounting
• Specific-fit design with included wiring harness
• 4-wire configuration with blade terminals and rectangular connector
• 18 mm thread diameter and 22 mm hex size
• Metal housing with steel finish for underbody durability
• Designed for upstream right and downstream applications listed below

Product Details

Bosch 13544 is a switching-type oxygen sensor that monitors exhaust oxygen content and sends accurate feedback to the engine control unit. Bosch’s narrowband design supports closed-loop fuel control after light-off, helping the engine maintain the correct air-fuel mixture during warm-up, cruise, and load changes. This Bosch Engineered Oxygen Sensor line reflects decades of OE sensor development and is built to deliver consistent operation under heat and vibration.

This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

Vehicle Fitment

• Fits 2002-2010 Lexus SC430, upstream right.
• Fits 2001-2007 Lexus GS430, upstream right.
• Fits 2001-2006 Lexus LS430, upstream right.
• Fits 1998-2005 Lexus GS300, downstream; cylinder(s) 1, 2, and 3.
• Fits 2003-2004 Pontiac Vibe, upstream.
• Fits 2003-2004 Toyota Corolla, upstream.
• Fits 2003-2004 Toyota Matrix, upstream.
• Fits 1998-2000 Lexus SC300, downstream; cylinder(s) 1, 2, and 3.
• Fits 1998 Toyota Supra, downstream; cylinder(s) 4, 5, and 6.

Installation Notes

Verify connector shape, wire count, thread size, and sensor position before installation. This Bosch 13544 oxygen sensor uses a threaded mount with an 18 mm thread diameter and 22 mm hex size, so the correct oxygen sensor socket or wrench is recommended. Confirm the vehicle application by year, make, model, and position before replacing the original sensor.

Quality Assurance

Bosch supplies oxygen sensors with OE-proven engineering and application-specific calibration for accurate exhaust feedback. The Bosch Engineered Oxygen Sensor line is built to maintain reliable signal response and durable operation in high-temperature exhaust service.