Bosch 13957 Oxygen Sensor - Upstream, Upstream Left or Upstream Right

Reliable Oxygen Sensor for Audi, Volkswagen, and More

The Bosch Actual OE Oxygen Sensor 13957 is designed to provide accurate air-fuel mixture readings for improved engine performance and emissions control. This narrow-band heated oxygen sensor is compatible with select Audi, Volkswagen, Ferrari, Hyundai, Saab, and Volvo models, ensuring precise fit and function.

• Specific fit for multiple Audi, Volkswagen, Ferrari, Hyundai, Saab, and Volvo models
• Heated narrow-band oxygen sensor for faster response times
• Threaded mounting type with 18 mm thread diameter and 22 mm hex size
• Includes wiring harness with 3 wires and blade pin terminals
• Durable metal housing with steel finish for long-lasting performance
• Connector features male and female terminals with rectangle/round shape
• Overall length of 49 inches with 45.3-inch wiring harness included

About the Bosch Actual OE Oxygen Sensor Line

The Bosch Actual OE Oxygen Sensor product line focuses on delivering direct replacement sensors that meet original equipment specifications. This ensures compatibility and reliable operation across a range of vehicles. The 13957 sensor maintains Bosch's standards for quality and durability, providing a standard replacement option for emission control systems.

Detailed Product Description

This Bosch oxygen sensor 13957 is a narrow-band heated sensor designed to monitor exhaust oxygen levels accurately. It features a threaded mounting type with an 18 mm thread diameter and a 22 mm hex size for easy installation. The sensor includes a 3-wire wiring harness with blade pin terminals and a connector that combines male and female terminals in a rectangle/round shape. The metal housing with a steel finish ensures durability under high-temperature conditions. With an overall length of 49 inches and a wiring harness length of 45.3 inches, this sensor is engineered for specific fitment on models such as the Audi 80 Quattro, Volkswagen Golf, Ferrari 348 TB, and Volvo 740, among others.

Common Applications and Issues Addressed

• Restores accurate air-fuel ratio readings for improved fuel efficiency
• Helps reduce harmful emissions by ensuring proper catalytic converter function
• Resolves engine performance issues related to faulty oxygen sensors
• Eliminates check engine light triggers caused by sensor failure
• Supports smooth engine idling and acceleration response

Installation Notes and Tips

Installation requires a 22 mm wrench or socket to remove the old sensor and install the new one. Ensure the threaded mounting surface is clean before installation. The sensor’s wiring harness and connector are designed for specific vehicle fitment, so verify compatibility with your Audi, Volkswagen, Ferrari, Hyundai, Saab, or Volvo model. Avoid over-tightening to prevent damage to the sensor or exhaust manifold.

Quality Assurance and Warranty

Bosch oxygen sensors are manufactured to meet strict quality standards, ensuring reliable performance and durability. The Actual OE Oxygen Sensor 13957 is a standard replacement part backed by Bosch’s commitment to quality. Please refer to Bosch’s warranty policy for specific coverage details.