Bosch 15848 Oxygen Sensor - Upstream

Bosch Validated Oxygen Sensor for Suzuki Forenza

Bosch Validated Oxygen Sensor 15848 is a specific-fit, narrow-band heated O2 sensor built for precise air-fuel-ratio feedback to the ECU. It is listed for the 2004-2005 Suzuki Forenza, upstream, and uses a threaded mounting design with a 4-wire harness for direct replacement service.

Key Features

• Specific-fit oxygen sensor for the 2004-2005 Suzuki Forenza, upstream
• Narrow-band heated oxygen sensor for closed-loop fuel control
• 4-wire design with rectangular male connector and blade terminals
• Threaded mounting with 18 mm thread size and 22 mm hex size
• Wiring harness included with 10.6 in harness length
• Standard replacement grade from Bosch Validated Oxygen Sensor
• Metal housing with high-temperature-resistant construction

Product Details

Bosch part number 15848 is engineered as a narrow-band heated oxygen sensor that reports exhaust oxygen content to the engine control unit so the fuel system can maintain stable combustion control. Bosch developed this sensor line from its long OE oxygen sensor history, using ceramic sensing elements, controlled heater operation, and durable materials to maintain accurate signal response under heat and vibration. For drivers and technicians servicing a 2004-2005 Suzuki Forenza, upstream sensor replacement with Bosch 15848 supports proper fuel trim control and emissions monitoring.

This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

What It Helps Address

• Check engine light related to upstream oxygen sensor performance
• Rough idle caused by inaccurate air-fuel feedback
• Fuel trim issues from a slow or aging narrow-band sensor
• Emissions test failures tied to oxygen sensor response problems
• Reduced closed-loop fuel control on the Suzuki Forenza

Installation Notes

Install Bosch 15848 in the upstream sensor location specified for the 2004-2005 Suzuki Forenza. Verify the 18 mm thread size, 22 mm hex size, 4-wire connector layout, and harness routing before installation. Because this is a threaded sensor, use the correct oxygen sensor socket and apply proper torque to avoid thread damage or exhaust leaks. Confirm connector orientation and secure the harness away from hot exhaust components.

Quality Assurance

Bosch Validated Oxygen Sensor 15848 reflects Bosch OE development experience in oxygen sensing technology, including narrow-band and heated sensor designs used for precise emissions control. The part is built for standard replacement service with materials selected for thermal durability and consistent signal performance.