fits e.g. Renault Clio III (BR0/1, CR0/1) (please check exact vehicle application) Heated Fuel Efficiency and Emission Control: Measures oxygen in exhaust gases, optimizing fuel-air mix for lower emissions and better engine efficiency, reduced fuel use and lower overall emissions Built for durability: HELLA Lambda Sensors offer improved overheating protection and increased lifespan and reliability. Precise fit for each engine - please check exact vehicle application. Overheating Protection: HELLA Oxygen Sensor reduces overheating risk, extending sensor life for better engine performance and lower fuel use.