Bosch 12028 Oxygen Sensor - Upstream

Reliable Oxygen Sensor for Select GM and Jeep Models

The Bosch Actual OE Oxygen Sensor 12028 is designed to provide accurate air-fuel mixture readings for improved engine performance and emissions control. This specific fit oxygen sensor is compatible with a range of Buick, Cadillac, Chevrolet, Jeep, Oldsmobile, and Pontiac vehicles, ensuring precise replacement for your emission control system.

• Wiring harness length: 10 inches for flexible installation
• Blade terminal type with 2 terminals for secure electrical connection
• Specific fit for select GM and Jeep models
• Standard replacement grade for reliable performance
• Oblong male connector with 2 male terminals
• Threaded mounting type with 18 mm thread diameter and 22 mm hex size
• Metal housing with steel finish for durability
• Narrow-band non-heated oxygen sensor type
• Overall length of 13.7 inches including 12.5 inches from sealing surface to connector end
• Includes wiring harness for direct replacement

About the Bosch Actual OE Oxygen Sensor Line

The Bosch Actual OE Oxygen Sensor product line focuses on delivering sensors that meet original equipment specifications. This ensures compatibility and performance consistent with factory-installed parts. The 12028 oxygen sensor is engineered to match the exact fit and function required by your vehicle’s emission system, supporting proper engine management and emissions compliance.

Detailed Product Description

This Bosch oxygen sensor 12028 is a narrow-band, non-heated sensor designed for specific fitment on various Buick, Cadillac, Chevrolet, Jeep, Oldsmobile, and Pontiac models. It features a 10-inch wiring harness and a blade terminal type with two terminals, providing a secure and reliable electrical connection. The sensor’s metal housing with a steel finish offers durability under harsh engine conditions. Its threaded mounting type with an 18 mm thread diameter and 22 mm hex size allows for straightforward installation using standard tools. The oblong male connector with two male terminals ensures proper mating with the vehicle’s wiring harness. This sensor is a standard replacement grade part, making it suitable for restoring factory-level emission control performance.

Common Applications and Issues Addressed

• Restores accurate oxygen sensing for improved fuel efficiency
• Helps resolve check engine light codes related to oxygen sensor failure
• Reduces rough idling and engine hesitation caused by faulty sensors
• Supports proper catalytic converter function by maintaining correct air-fuel ratios
• Prevents increased emissions due to sensor degradation

Installation Notes and Tips

Ensure the engine is cool before removing the old oxygen sensor to avoid burns. Use a 22 mm oxygen sensor socket or wrench for removal and installation. Verify the sensor’s wiring harness length and connector type match your vehicle’s specifications. Avoid twisting or damaging the wiring harness during installation. Since this is a specific fit sensor, confirm compatibility with your vehicle’s make and model before installation.

Quality Assurance and Warranty

Bosch oxygen sensors are manufactured to meet strict quality standards and original equipment specifications. The Actual OE Oxygen Sensor line is designed for reliable performance and durability. While specific warranty details are not provided here, Bosch typically offers limited warranties on their emission control sensors. Refer to Bosch’s official documentation or your parts provider for warranty information related to part number 12028.