Bosch 13049 Oxygen Sensor - Upstream

Reliable Oxygen Sensor for BMW 3, 5, 6, and 7 Series

The Bosch Actual OE Oxygen Sensor 13049 is designed specifically for select BMW models including the 325e, 325es, 535i, 635CSi, 735i, M5, and M6. This narrow-band heated oxygen sensor ensures accurate air-fuel mixture readings to support optimal engine performance and emissions control.

• Brand: Bosch
• Part Number: 13049
• Compatible with BMW 325e, 325es, 535i, 635CSi, 735i, M5, M6
• Type: Narrow-band heated oxygen sensor
• Wiring harness length: 66.8 inches
• Thread size: 18 mm with 22 mm hex size
• Connector: Round shape, male and female terminals
• Mounting: Threaded with included mounting bracket
• Wire quantity: 3 with blade pin terminals
• Material: Metal housing with steel finish

About the Bosch Actual OE Oxygen Sensor Line

The Actual OE Oxygen Sensor line by Bosch is engineered to meet original equipment specifications for precise fit and function. This product line focuses on delivering standard replacement sensors that maintain factory performance standards, making it a reliable choice for BMW owners seeking a direct-fit solution for emission control sensors.

Product Details and Specifications

This Bosch oxygen sensor features a narrow-band heated design, which allows for faster sensor warm-up and improved accuracy in measuring oxygen levels in the exhaust gases. The sensor includes a 66.8-inch wiring harness with three wires and blade pin terminals, ensuring secure electrical connections. The threaded mounting type with an 18 mm thread diameter and 22 mm hex size allows for straightforward installation. The sensor’s metal housing and steel finish provide durability and resistance to harsh engine conditions. Additionally, the package includes a mounting bracket and wiring harness for a complete replacement setup.

Common Applications and Issues Addressed

• Restores accurate air-fuel ratio readings for BMW 325e, 325es, 535i, 635CSi, 735i, M5, and M6 models
• Helps resolve engine performance problems such as rough idling and poor fuel economy
• Reduces emissions by ensuring proper catalytic converter function
• Eliminates check engine light triggers related to oxygen sensor faults
• Prevents drivability issues caused by faulty or aging oxygen sensors

Installation Notes and Tips

When installing the Bosch 13049 oxygen sensor, ensure the engine is cool to avoid burns. Use the included mounting bracket and verify the wiring harness length of 66.8 inches is sufficient for your vehicle’s routing. The sensor’s threaded design requires an 18 mm thread size socket or wrench, with a 22 mm hex for tightening. Confirm connector compatibility with the vehicle’s male and female terminals before installation. Proper torque specifications should be followed to avoid sensor damage or exhaust leaks.

Quality Assurance and Warranty

Bosch oxygen sensors are manufactured to meet strict quality standards and undergo rigorous testing to ensure durability and performance. The Actual OE Oxygen Sensor 13049 is a standard replacement part designed to match OEM specifications. While specific warranty details may vary, Bosch typically offers limited warranties on their emission control sensors to cover defects in materials and workmanship.