Description
Catalytic converter for CITROËN and PEUGEOT vehicles with 1.4 VTi and 1.6 VTi engines. From a car with an actual mileage of 68,000 km.
Product Overview
High-quality replacement catalytic converter suitable for petrol 1.4 VTi and 1.6 VTi engines used in a range of CITROËN and PEUGEOT models. The catalytic converter reduces harmful exhaust emissions by promoting chemical reactions that convert carbon monoxide, hydrocarbons and nitrogen oxides into less harmful gases. This unit is particularly useful for professional mechanics and experienced DIYers looking for a direct-fit option with known provenance and mileage.
Technical Information
- Manufacturer: Stellantis (CITROËN / PEUGEOT)
- Model: Citroën C3 Picasso; Citroën C4 II; Peugeot 308 (with 1.4 VTi or 1.6 VTi engines)
- Product Codes: K485 0341P9
- Other Numbers: 0341P9
- Mileage: 68,000 km
Installation Recommendations
- Work On A Cold Exhaust: Allow the vehicle to cool completely before starting—exhaust components reach very high temperatures.
- Lift And Secure The Vehicle Safely: Use a lift or secure jack stands to ensure safe access to the exhaust system.
- Inspect And Replace Gaskets/Clamps: Always fit new flange gaskets and use appropriate clamps or bolts; exhaust leaks will affect performance and emissions.
- Check Oxygen Sensors: Verify upstream and downstream O2 sensor condition and wiring; faulty sensors can cause poor converter performance.
- Use Penetrating Oil And Correct Tools: Apply penetrating oil to seized bolts and use impact or heat where necessary; take care not to damage flanges or sensor threads.
- Seal And Torque To Spec: Torque bolts to manufacturer recommendations where available and ensure a gas-tight seal to prevent leaks.
- Final Check: After installation, inspect for leaks, verify exhaust flow and monitor engine fault codes to confirm correct operation.
Why This Part Fails Most Often
- Contamination: Oil or coolant entering the exhaust (from worn piston rings, valve stem seals or head gasket leaks) can coat the catalyst and reduce efficiency.
- Overheating: Repeated misfires or a rich-running condition can overheat and melt the internal substrate.
- Physical Damage: Road impact or corrosion can cause structural damage, cracks or holes in the housing.
- Clogging: Build-up of carbon deposits or foreign material can restrict flow and increase backpressure, affecting engine performance.
- Associated Component Failure: Failed oxygen sensors or ignition/fuel delivery issues often lead to premature catalytic converter wear.
This catalytic converter (K485 0341P9) is a practical replacement option for workshops and competent DIYers who require a part with traceable origin and reasonable mileage. It restores emission control function and helps maintain correct engine behavior when installed together with any necessary ancillary repairs (sensors, gaskets, or engine tuning).
