Bosch 15558 Oxygen Sensor - Upstream

Bosch Wideband O2 Sensor for Volvo S70 and V70

Bosch Validated Oxygen Sensor 15558 is a direct-fit wideband air/fuel sensor for specific 2000 Volvo applications. It delivers precise lambda feedback to the ECU for accurate fuel control, stable drivability, and lower emissions.

Built with a heated design, 4-wire blade terminal configuration, and threaded 18 mm mounting, this Bosch oxygen sensor is made for upstream placement on the Volvo S70 and Volvo V70.

Key Features

• Wideband A/F oxygen sensor for continuous air-fuel ratio measurement
• Specific fit for 2000 Volvo S70 upstream and 2000 Volvo V70 upstream
• Heated sensor with optimized heater control for faster operating response
• 4-wire design with rectangle male connector and blade terminals
• Threaded metal housing with 18 mm thread diameter and 22 mm hex size
• Wiring harness included with 13.5 in harness length
• Bosch Validated Oxygen Sensor line for OE-style replacement applications

Product Details

Bosch part number 15558 is a wide band oxygen sensor engineered for precise feedback in the exhaust stream. Unlike a basic switching sensor, this wideband design provides continuous measurement across the full lambda range, helping the engine control module maintain the correct air-fuel mixture under changing load and temperature conditions. For 2000 Volvo S70 and 2000 Volvo V70 upstream service, Bosch 15558 offers the direct-fit configuration needed for a clean replacement.

The Bosch Validated Oxygen Sensor line focuses on OE-proven sensor construction and response characteristics. Bosch developed the planar pump-cell wideband design used in modern engine management, and that experience is reflected in this replacement sensor’s fast light-off behavior, robust ceramic construction, and stable signal output. This part cross-references 9202309 for the same application.

Common Issues This Sensor Can Address

• Check engine light related to oxygen sensor performance
• Incorrect air-fuel ratio readings from a worn upstream sensor
• Poor fuel economy caused by inaccurate exhaust feedback
• Rough idle or hesitation tied to sensor response issues
• Failed emissions testing due to degraded oxygen sensor output

Installation Notes and Tips

Fits 2000 Volvo S70, upstream. Fits 2000 Volvo V70, upstream. Confirm the connector shape, 4-wire layout, and 18 mm threaded mounting before installation. Use the correct oxygen sensor socket or 22 mm hex tool, and inspect the harness routing so the lead is not stretched or exposed to exhaust heat.

Because this is a specific-fit Bosch oxygen sensor, verify the upstream location and connector match the original sensor before replacement. For Volvo S70 and Volvo V70 service, matching the OE-style connector and harness length helps ensure proper routing and secure installation.

Quality Assurance

Bosch backs this sensor with more than five decades of OE development in engine management and emissions control. The Bosch Validated Oxygen Sensor 15558 is built to the same type of standards vehicle manufacturers rely on for accurate exhaust feedback and dependable operation.