Ford Focus Mondeo 1.4/1.6L Oxygen Sensor 0258006155 Front/Rear Oxygen Universal Replacement

This oxygen sensor is designed for Ford Focus (2005–2011, 1.4L/1.6L) and Ford Mondeo (2007–2014, 1.6L); compatible with both pre- and post-oxygen positions for universal replacement. Core function: real-time monitoring of exhaust oxygen content and feeding ECU to adjust the air–fuel ratio; prevents increased fuel consumption or fault light. OEM 0258006155; confirm exact OEM part number for compatibility. Replacement difficulty: medium; use a dedicated socket and ensure thread cleanliness to avoid cross-threading; if over 80,000 km, consider replacing both front and rear sensors to optimize performance. KLP branded, factory spec, suitable for bulk maintenance procurement.