Peugeot 308 Catalytic Converter

The catalytic converter in the Peugeot 308 is a crucial part of the exhaust system designed to reduce harmful emissions such as carbon monoxide (CO), hydrocarbons (HC), and nitrogen oxides (NOx). It is present on both petrol engines like the 1.2 VTi and 1.6 PureTech, and diesel engines including the 1.6 BlueHDi and HDi, ensuring compliance with environmental standards and cleaner exhaust gases.

The catalytic converter is fitted to various Peugeot 308 engines across different model years:

• Peugeot 308 II (2013-2021) with 1.6 BlueHDi 120 ch engines (Euro 6, engine codes BHZ/DV6FC).
• Peugeot 308 GT 225 PureTech 1.6 16v (2018+) with sportier downpipe modifications.
• Other petrol engines such as the 1.2 VTi and diesel 1.6 HDi variants with reinforced downpipe designs (Euro 4).

This wide compatibility covers both petrol and diesel variants with relevant emissions control hardware.

Users may notice several signs of catalytic converter failure including :

• Illuminated engine warning light (check engine light).
• Loss of engine power or reduced acceleration.
• Unusual odors inside the cabin, often a rotten egg or sulfur smell.
• Engine misfires or irregular running.
• Visible cracks or clogging after removal and inspection.

For diesel engines, a blocked oxidation catalytic converter (OXI) might be cleaned chemically without removal to improve flow.

Yes, replacing a Peugeot 308 catalytic converter is possible as a DIY project for users with basic mechanical skills and tools. Typical steps include :

• Safely lifting the car, disconnecting the battery and lambda sensors.
• Removing clamps, bolts, and old catalytic converter carefully, noting heat and rust issues.
• Installing the new catalytic converter with proper gaskets and clamps, avoiding overtightening.
• Reconnecting sensors and clearing error codes with an OBD scanner to extinguish warning lights.

This work generally takes 30–60 minutes, with parts costing between £200 and £800 depending on OEM or aftermarket options.

Some Peugeot 308 diesel catalytic converters, especially oxidation type (OXI), can be cleaned without replacement by specialized chemical or mechanical methods to restore flow and reduce blockage. However, this is typically a temporary measure. For petrol models or severely damaged units, replacement is advisable to ensure emissions compliance and engine performance.

Replacement catalytic converters for Peugeot 308 come in various types :

• New original equipment manufacturer (OEM) quality catalytic converters certified to meet or exceed regulatory standards.
• Oxidation catalytic converters for diesel BlueHDi engines (Euro 6 compliant).
• Downpipes with integrated catalytic converters for certain petrol and diesel models, including sportier versions (note these may affect road legality).
• Accessory kits like mounting parts, lambda sensors, and gaskets designed for proper installation.

Always verify compatibility using engine codes or VIN, and choose certified OEM or equivalent quality parts to avoid inspection failures.

Krosfou catalytic converters and diesel particulate filters (DPFs) are covered by a 3-year warranty for up to 100,000 km usage. Manufactured in high-grade INOX 409 stainless steel and equipped with advanced monolith technology, these parts offer outstanding durability and performance, certified by TÜV SÜD to meet or exceed OEM and environmental standards.

• Made in Europe with superior materials ensuring longevity.
• Designed for optimal flow and pollutant reduction.
• Backed by factory direct sales offering competitive pricing and support.

This ensures Peugeot 308 owners receive reliable, high-quality parts that protect their investment and the environment.

Many online resources provide detailed tutorials, user guides, and video demonstrations on checking, cleaning, and replacing the Peugeot 308 catalytic converter. Recommended steps include :

• Searching for tutorials with model and engine-specific keywords.
• Consulting professional forums and communities focused on Peugeot repairs.
• Using manufacturer-provided documentation and installation manuals for precise guidance.
• Contacting parts suppliers for technical support and compatibility confirmation based on VIN.

Always perform a detailed diagnosis, including OBD scanning, before deciding on repairs or replacements to save money and optimize car performance.

For Peugeot 308 owners looking to choose the right catalytic converter, careful selection based on engine type, regulatory compliance, and brand reputation is essential to ensure long-term satisfaction.