Bosch 15738 Oxygen Sensor

Overview of Bosch Universal Oxygen Sensor 15738

The Bosch Universal Oxygen Sensor 15738 is designed to provide reliable emission control for a wide range of vehicles including Audi, BMW, Mercedes-Benz, and Volkswagen models. This narrow-band heated oxygen sensor offers a universal fit with a threaded mounting type, making it suitable for various automotive applications.

• Universal fit oxygen sensor compatible with multiple makes and models
• Heated narrow-band sensor for accurate air-fuel mixture readings
• Threaded mounting with 18 mm thread diameter and 22 mm hex size
• Includes 23.3-inch wiring harness with 4 wires and male connector
• Durable metal housing finished in steel for long-lasting performance

Detailed Features and Specifications

The Bosch Universal Oxygen Sensor 15738 features a 23.3-inch wiring harness and a total length of 27 inches, allowing flexible installation in various engine compartments. It uses a threaded terminal type with four female terminals and a round male connector, ensuring secure electrical connections. The sensor is a narrow-band heated type, which helps maintain optimal engine performance and emissions control by providing precise oxygen level data to the engine control unit (ECU). The sensor’s metal housing and steel finish contribute to its durability under high-temperature conditions.

This sensor is designed as a standard replacement part, making it suitable for maintenance and repair of emission control systems in vehicles such as the BMW 3 Series (318i, 320i, 330i), Audi A4 and A6 Quattro, Mercedes-Benz E320, Volkswagen Golf, and many others listed in the fitment section. The Bosch Universal Oxygen Sensor line is known for its broad compatibility and reliable performance across multiple vehicle brands.

About the Bosch Universal Oxygen Sensor Line

The Bosch Universal Oxygen Sensor product line offers versatile emission control solutions that fit a wide range of vehicles. These sensors are engineered to meet OEM specifications for standard replacement applications, providing consistent sensor response and durability. The Universal Oxygen Sensor line simplifies inventory management by covering multiple makes and models with a single part number, such as the 15738.

Common Applications and Issues Addressed

• Restores proper air-fuel ratio readings for improved engine efficiency
• Resolves check engine light triggers related to oxygen sensor faults
• Helps reduce harmful emissions by ensuring accurate sensor feedback
• Prevents rough idling and poor fuel economy caused by faulty sensors
• Supports compliance with emission regulations for vehicles like Audi 9-3, BMW 325i, and Mercedes-Benz SL500

Installation Notes and Tips

• Ensure the threaded mounting hole is clean and free of debris before installation
• Use a 22 mm oxygen sensor socket for proper tightening
• Verify wiring harness length and connector compatibility with your vehicle’s harness
• Do not overtighten to avoid damaging the sensor or threads
• Check for any ECU codes after installation to confirm sensor operation

Quality Assurance and Warranty

Bosch oxygen sensors, including the Universal Oxygen Sensor 15738, are manufactured to meet strict quality standards for durability and performance. The sensor’s metal housing and heated design contribute to long service life under demanding conditions. While specific warranty details may vary, Bosch typically offers a limited warranty covering defects in materials and workmanship for replacement parts.