Bosch 13471 Oxygen Sensor - Downstream

Overview

Bosch 13471 is a specific-fit oxygen sensor for emissions control applications. It uses a narrow-band, non-heated design to deliver air-fuel ratio feedback to the ECU for stable combustion control and lower emissions.

Fits 1990-1992 Lexus LS400, downstream. Bosch 13471 is built with a threaded mounting design, a rectangular connector, and a 2-wire layout for direct replacement use in the correct application.

Key Features

• Narrow-band, non-heated oxygen sensor design
• Specific-fit application with threaded mounting
• Rectangular connector with male connector gender and female terminal gender
• 2-wire harness configuration with included wiring harness
• 22 mm hex size and 18 mm thread diameter
• Bosch Validated Oxygen Sensor line

Detailed Description

Bosch 13471 is engineered as a switching-type oxygen sensor that reports exhaust oxygen content to the ECU so fuel control can stay accurate across changing operating conditions. Bosch’s ceramic sensing element and high-temperature materials are used to maintain consistent signal quality under heat and vibration, while the narrow-band design supports closed-loop operation in the intended emissions system.

This part cross-references Bosch 8946550020 for the same application. It is a direct-fit style replacement for the specified Lexus LS400 downstream location and is identified by part number 13471.

The Bosch Validated Oxygen Sensor line reflects Bosch’s OE development background and focus on accurate sensor output for emissions management. For buyers searching for a Lexus LS400 downstream oxygen sensor, Bosch 13471 provides the correct fitment profile and sensor configuration for the listed vehicles.

What It Helps Address

• Incorrect air-fuel ratio readings
• Unstable closed-loop fuel control
• Elevated exhaust emissions
• Delayed or inconsistent sensor response
• Faults caused by worn oxygen sensor elements

Installation Notes

Confirm the downstream location, threaded mounting style, connector shape, and 2-wire configuration before installation. Match the thread diameter and hex size to the original sensor, and verify harness routing and connector orientation during replacement. Bosch 13471 is a specific-fit oxygen sensor for the listed application.

Quality Assurance

Bosch draws on more than five decades of OE sensor development, and this oxygen sensor uses materials and construction methods selected for thermal and vibration resistance. Part number 13471 is part of Bosch’s aftermarket oxygen sensor range built around OE-proven sensor technology.