Mercedes Viano Catalytic Converter W639 (2003-2014)

A catalytic converter is a key component of the exhaust system in the Mercedes Viano W639 models equipped mainly with diesel engines such as the 2.0 CDI and 3.0 CDI. It reduces harmful emissions by converting exhaust pollutants into less harmful gases, helping the vehicle comply with Euro emission standards (e.g., Euro 4). The catalytic converters are made from high-quality stainless steel and use advanced monolith technology to ensure durability and optimal performance.

The catalytic converters are designed for various Mercedes Viano W639 diesel engines:

• 2.0 CDI 4matic, 136 PS / 100 kW (2010/11 - 2014/01, engine code 651940)
• 2.0 CDI, 116 CV / 85 kW (2006 - 2010, engine code 646982)
• 3.0 CDI, 204 PS / 150 kW (from 2005 onwards, including Vito and Mixto variants)
• Models including Viano Minibus (2005-2006) and Vito Van (2006-2011)
• 2.0 TD / 2.2 TD with DPF filter from 2010 model year onward

Each catalytic converter item is matched to specific vehicle engine codes and Euro emission standards to ensure perfect compatibility and performance.

Driving with a bad catalytic converter is not recommended as it can negatively affect your car’s engine performance, fuel efficiency, and increase harmful emissions. Symptoms include:

• Reduced engine power
• Increased fuel consumption
• Check engine light or warning light flashing
• Possible engine knocking or poor acceleration

If you experience these issues, you should have the catalytic converter inspected and replaced if necessary to maintain vehicle performance and comply with emission regulations.

A catalytic converter treats exhaust gases by using a honeycomb-like monolith coated with rare metals that catalyze chemical reactions. This process transforms harmful gases such as carbon monoxide (CO), hydrocarbons (HC), and nitrogen oxides (NOx) into less harmful substances like carbon dioxide (CO2), nitrogen (N2), and water vapor. This is essential to reduce the environmental impact of diesel exhaust while maintaining engine efficiency.

• Oxidation of CO and HC into CO2 and H2O
• Reduction of NOx into nitrogen and oxygen

The catalytic converter is installed in the exhaust line, typically near the engine, and works under high temperature conditions to ensure effective emission control.

Krosfou offers brand-new catalytic converters with the following features:

• Manufactured in Europe with high-grade INOX 409 stainless steel
• High-performance monolith with thin-layer coating technology
• Certified by TÜV SÜD Automotive GmbH to meet or exceed original manufacturer standards
• Compliant with current European emission regulations
• 3-year warranty coverage limited to 100,000 km use
• Direct factory supply ensuring best quality-to-price ratio

These features ensure durability, reliability, and help preserve engine horsepower while reducing emissions effectively.

Compatibility relies on exact matching of the catalytic converter to your vehicle’s engine code, power output, and Euro emission standard. To confirm compatibility:

Provide your car’s VIN or engine code to the supplier or technician. This allows precise identification of the correct catalytic converter model suitable for your vehicle configuration.

• Check engine and emission standards compliance
• Verify mounting points and sensor fittings
• Review product technical descriptions and installation manuals

Proper verification avoids incorrect part purchases and ensures smooth installation.

If the warning light indicating catalytic converter or emission system issues starts flashing, you should:

• Avoid further driving to prevent engine damage
• Have the vehicle diagnosed promptly by a qualified repair professional
• Check for possible causes such as sensor faults, blockages, or physical damage
• Perform timely replacement of the catalytic converter or related components if necessary

Ignoring the warning may lead to increased emissions, failure of vehicle inspections, and engine performance problems.

Krosfou provides flexible and reliable service for catalytic converters, including:

• Delivery across Europe and internationally with options for standard or express shipping
• Free returns within 30 days for unused products in original packaging (conditions apply)
• An exclusive 3-year warranty covering manufacturing defects and performance for up to 100,000 km
• Warranty applies only if installation is done by specialists following manufacturer instructions
• Technical support is available for installation guidance and product compatibility

Customers are encouraged to verify stock availability, compatibility, and order details carefully to ensure a smooth transaction and satisfaction with their purchase.