Oxygen Sensor Lambda O2 airfuel ratio sensor probe compatible with Alfa Romeo, Fiat, and Lancia vehicles including Brava, Coupe, Marea, Stilo, Lancia Kappa, Lybra. Part number 46444284. Key features and specifications quality materials: ABS and copper construction for durable airfuel ratio sensing. Easy installation: Direct replacement for the original sensor; plugandplay with no rewiring required. Accurate performance: Designed to provide reliable readings to the engine management system. Benefits Improves fuel economy by maintaining the correct airfuel ratio. Helps reduce harmful emissions by supporting efficient combustion. Supports stable engine operation and better throttle response through precise sensor data. Use scenarios Routine maintenance: a worn or failed O2 sensor on compatible Alfa Romeo, Fiat, and Lancia models (Brava, Coupe, Marea, Stilo, Kappa, Lybra) to restore proper fuel metering. Diagnostics and emissions: Use to address fuel economy dips or emissions, helping the vehicle pass inspections by ensuring accurate oxygen sensing. Performance and efficiency maintenance: Install during service to maintain engine efficiency and smooth operation on covered models.