Mercedes Viano Catalytic Converter W639 (2003-2014)

A catalytic converter is an essential component of the exhaust system in the Mercedes Viano W639, designed to reduce harmful emissions from the diesel engine by converting toxic gases into less harmful substances before they exit the vehicle's exhaust. It plays a crucial role in complying with Euro 4 and Euro 5 environmental standards depending on the engine model.

The W639 model (2003-2014) of Mercedes Viano is equipped with catalytic converters on various diesel engines including:

• 2.1 CDI (Euro 4, 2003-2011)
• 3.0 CDI OM642.990 (204 hp, 2006-2010 approximately)
• 2.2 CDI 4Matic (Euro 5, 2010-2014)
• 2.0 TD / 2.2 TD with integrated DPF (post-2010 models)

Each engine has specific catalytic converter references and sizes adapted to its configuration.

To find the correct catalytic converter, you should:

• Check your vehicle’s exact engine code (e.g. OM642, 651.940).
• Confirm the emission standard (Euro 4 or Euro 5).
• Verify the presence of a particulate filter (DPF).
• Use your VIN if possible to confirm precise compatibility.
• Refer to the original equipment (OE) references for your engine type.

Manufacturers produce catalytic converters with E-Mark certification to guarantee compliance with European regulations and vehicle-specific fitment.

Driving with a faulty catalytic converter is not recommended because it can cause increased pollution, reduce engine performance, trigger warning lights such as the check engine light, and might lead to more significant mechanical issues over time.

It is advisable to have the catalytic converter inspected and replaced if necessary by a qualified mechanic to maintain vehicle performance and comply with emissions regulations.

The catalytic converter uses a high-quality monolith coated with rare metals that facilitate chemical reactions. These reactions convert harmful gases such as carbon monoxide (CO), nitrogen oxides (NOx), and hydrocarbons (HC) into less harmful gases like carbon dioxide (CO2), nitrogen, and water vapor.

The process involves:

• Oxidation of CO and HC into carbon dioxide and water.
• Reduction of NOx into nitrogen and oxygen.

This cutting-edge technology ensures efficient pollution control and satisfies strict emission standards.

Common symptoms indicating issues with the catalytic converter include :

• Check engine light turning on.
• Reduced engine power and acceleration.
• Unusual exhaust smells or noises.
• Increased fuel consumption.
• Engine misfires or stalling.

If these symptoms appear, timely inspection and diagnostics by a professional mechanic are essential to avoid further damage.

You can access detailed technical data and order genuine high-quality catalytic converters compliant with European standards directly from specialized factory suppliers. These suppliers offer fast shipping, typically within 3 to 8 working days for standard delivery, with options for express shipping.

Ordering through professional platforms ensures you get parts manufactured from durable stainless steel equipped with advanced monolith technology for exceptional performance and longevity.

Many wonder how to sell their used catalytic converter profitably. Consider the following :

• The catalytic converter contains valuable precious metals in the monolith coating.
• Its market price varies depending on stock and demand in scrap markets.
• Timely sale when market prices are favourable can increase return.
• Sell through specialised recycling and buy-back programs to ensure value and responsible disposal.

Please note that before selling, evaluate your catalytic converter’s condition and confirm it is permitted by applicable regulations.