Bosch 12009 Oxygen Sensor - Upstream

Reliable Oxygen Sensor for Dodge and Jeep Vehicles

The Bosch Validated Oxygen Sensor 12009 is designed specifically for select Dodge and Jeep models, including Cherokee, CJ7, Comanche, Grand Wagoneer, J10, J20, Monaco, Scrambler, and Wagoneer. This narrow-band heated oxygen sensor ensures accurate emission control and optimal engine performance.

• Specific fit for Dodge and Jeep models listed
• Heated narrow-band oxygen sensor for precise air-fuel mixture readings
• Threaded mounting type with 18 mm thread diameter and 22 mm hex size
• Includes 8.6-inch wiring harness with 3 male blade terminals and oblong male connector
• Durable metal housing finished in steel for long-lasting use
• Overall length of 12 inches with 10.8 inches from sealing surface to connector end
• Standard replacement grade for reliable emission control

About the Bosch Validated Oxygen Sensor Line

The Bosch Validated Oxygen Sensor product line focuses on delivering sensors that meet strict quality and performance standards. These sensors are engineered to provide accurate oxygen level readings, which are critical for maintaining proper engine function and emissions compliance. The 12009 sensor is part of this line, offering a specific fit and heated narrow-band technology to support efficient combustion in compatible Dodge and Jeep vehicles.

Product Details and Specifications

This oxygen sensor features a threaded mounting type with an 18 mm thread diameter and a 22 mm hex size for secure installation. The sensor is heated, which helps it reach operating temperature quickly for faster and more accurate readings. It includes a wiring harness measuring 8.6 inches in length, equipped with three male blade terminals and an oblong male connector, ensuring proper electrical connection. The sensor’s metal housing finished in steel provides durability under harsh engine conditions. With an overall length of 12 inches and a length of 10.8 inches from the sealing surface to the connector end, it fits precisely in the designated mounting location.

Common Applications and Issues Addressed

• Restores accurate oxygen sensing for emission control systems
• Helps resolve engine performance issues related to incorrect air-fuel mixture
• Reduces rough idling and engine hesitation caused by faulty sensors
• Supports compliance with emission regulations by maintaining sensor accuracy
• Prevents check engine light triggers related to oxygen sensor faults

Installation Notes and Tips

Ensure the vehicle is compatible with the Bosch Validated Oxygen Sensor 12009 before installation. The sensor uses a threaded mounting type requiring an 18 mm thread size and a 22 mm hex wrench for removal and installation. Handle the sensor carefully to avoid damaging the wiring harness or connector. Confirm the wiring harness and connector match the vehicle’s original equipment to ensure proper fit and function. No mounting bracket is included, so use the existing mounting point on the vehicle.

Quality Assurance and Warranty

The Bosch Validated Oxygen Sensor 12009 is manufactured to meet OEM standards for fit, form, and function. It is constructed with high-quality materials, including a metal housing and heated sensor element, to provide reliable performance. While specific warranty details are not provided here, Bosch products typically come with a limited warranty covering defects in materials and workmanship. Refer to Bosch or the vehicle service provider for exact warranty terms.