Description
Catalytic converter for Citroën and Peugeot vehicles with 1.4 VTi and 1.6 VTi engines. Removed from a vehicle with genuine 78,000 km mileage.
This used catalytic converter is a direct-fit option for a range of Citroën and Peugeot petrol models equipped with the 1.4 VTi and 1.6 VTi engines. It is ideal for professional workshops and experienced DIY mechanics who need a reliable replacement part with original fitment characteristics. The unit preserves the exhaust routing and mounting points of the OEM component, helping to restore correct emissions control and engine performance where the original converter has become restricted or damaged.
Function And Benefits
The catalytic converter converts harmful exhaust gases (CO, HC and NOx) into less harmful compounds using its ceramic/metallic substrate coated with precious metal catalysts. A healthy converter reduces emissions, contributes to stable lambda sensor readings and supports the proper operation of the engine management system. Replacing a faulty or clogged converter can clear related fault codes and help the vehicle pass emissions testing when the underlying engine faults have been resolved.
Fitment And Compatible Models
Designed for petrol 1.4 VTi and 1.6 VTi engines. Typical compatible models include Citroën C3 Picasso, Citroën C4 II and Peugeot 308. Compatibility depends on model year and exhaust layout—this unit corresponds to the part codes listed below.
How Replacement Is Performed
- Raise the vehicle safely and support on stands to access the exhaust underbody area.
- Remove any heat shields and disconnect upstream and downstream oxygen sensors (label and protect sensors to avoid damage).
- Unbolt flanges or release exhaust clamps and remove the old converter; cutting or grinding may be required on rusted connections.
- Fit the replacement converter using new gaskets/clamps where applicable. Ensure correct orientation and secure all mounting points and hangers.
- Reinstall oxygen sensors, check for exhaust leaks and torque bolts to manufacturer specifications.
- Clear fault codes and run the engine to verify lambda sensor readings and proper operation.
Installation Recommendations
- Use new gaskets and high-quality clamps or bolts when reinstalling the exhaust to ensure a tight, leak-free seal.
- Inspect and, if necessary, replace oxygen sensors when the converter is faulty or sensors show degraded performance.
- Clean mating surfaces and check exhaust hangers and brackets for wear; replace any corroded fasteners.
- Perform a full engine diagnosis to correct causes of rich running, misfires or excessive oil consumption before installing the converter—otherwise premature failure may recur.
- Where cutting of the old exhaust is necessary, ensure proper preparation and use heat shields to protect nearby components during welding.
Most Common Reasons For Failure
- Carbon clogging from prolonged rich running or repeated misfires, which restricts flow and increases backpressure.
- Thermal damage from overheating caused by unburnt fuel igniting on the catalyst (e.g., persistent misfire or fuel system faults).
- Physical damage from road impacts, corrosion or collapse of internal substrate.
- Contamination/poisoning by engine oil, coolant or certain fuel additives that coat the catalyst surface and reduce efficiency.
Technical Information
- Manufacturer: Stellantis (Citroën / Peugeot)
- Model: 1.4 VTi, 1.6 VTi — Typical fitment: Citroën C3 Picasso, Citroën C4 II, Peugeot 308
- Product Codes: 0341P9
- Other Numbers: K485
Notes For The Workshop
As a used original part, the converter shows normal wear consistent with its recorded mileage. Ensure the engine and fuel/ignition systems are in correct operating condition prior to installation to avoid repeat failures. When exchanging components in the exhaust system, always follow workshop safety standards and vehicle manufacturer guidance.
