Catalytic Converter and Oxygen Sensor Cleaner

Wynn’s Catalytic Converter & Oxygen Sensor Cleaner for petrol and petrol hybrid engines optimizes the efficiency of the catalytic converter and ensures the optimal working of the lambda (oxygen) sensors.

  • DUAL ACTION: Before Combustion & After Combustion
  • Removes deposits (oil and unburned fuel particles) and reduces emissions.
  • Ensures optimal working of the Cat and the O2 sensors.
  • Prolongs the lifetime of the catalytic converter and oxygen sensors.
  • Prevents OBD warning lamp illuminations.
  • Improves fuel efficiency by restoring the air-fuel ratio.
  • Restores engine performance.
  • Especially suited for city driving cycles.


Recommended for all petrol and petrol hybrid engines.


Curative: add 1 bottle (500 ml) to minimum 30 litres of petrol.
Preventive: add 1 bottle (500 ml) to a full fuel tank.
Bottle is also suitable for capless fuel fillers.


PN 25692 – 12x500 ml – EN/FR/DE/NL/IT



Both modern cars and older vehicles have specific requirements, that have a chemical solution to provide the optimal engine performance and driving comfort. Modern fuel systems are highly tuned and therefore more susceptible to the negative effects of chemical reactions in the fuel. These lead to fouling of the fuel system, lack of lubrication, corrosion and other problems. Older vehicles experience problems to obtain the correct air/fuel ratio and combustion efficiency due to accumulation of deposits in the fuel system and wear on the components.