Fiat 500 Catalytic Converter

The catalytic converter in a Fiat 500 is an essential component of the exhaust system that reduces harmful emissions including hydrocarbons (HC), carbon monoxide (CO), and nitrogen oxides (NOx) through a three-way chemical reaction. It requires unleaded fuel and a stoichiometric air-fuel mixture (Lambda = 1) to operate effectively, converting pollutants into less harmful gases like oxygen (O2) and nitrogen (N2).

The system on the Fiat 500 is electronically controlled via a lambda probe and an electronic regulator that adjusts the air/fuel mixture by oscillating between rich and lean mixtures about twice per second. The lambda sensor monitors if the mixture is rich (Lambda < 1) or lean (Lambda > 1), controlling secondary air injection to maintain an optimal 14.7:1 air to fuel ratio. The catalytic converter’s core is a metal honeycomb coated with ceramics containing platinum and rhodium catalysts facilitating combustion and decomposition reactions. This design achieves 90-95% exhaust gas cleaning efficiency.

Signs of a failing catalytic converter include:

• Illuminated engine warning light with diagnostic trouble code P0420 for low catalyst efficiency
• Engine misfires and loss of power
• Unusual sulfur or rotten egg odor from exhaust
• Increased fuel consumption
• Non-linear behavior of the rear lambda sensor (post-converter sensor)

These symptoms are applicable to various Fiat models including Fiat 500, 500 Abarth, Punto, Panda, and also Ford Ka 1.2.

Replacement involves the following general steps:

• Disconnect the battery and remove both lambda sensors with a specific socket, use WD-40 if sensors are seized.
• Loosen exhaust manifold and catalytic converter bolts, separate tubes (use a hammer gently for stuck parts).
• Remove the old catalytic converter carefully from either the top or bottom depending on access.
• Clean and prepare mating surfaces, install new gaskets and the replacement catalytic converter.
• Reconnect lambda sensors, tighten all fasteners, clear OBD fault codes, and check sensor signals for proper operation.

New gaskets must be used to avoid air leaks that cause emission test failures. Professional or detailed DIY video guides for the Fiat 500 catalytic converter replacement are available online.

The catalytic converters are compatible with a range of Fiat vehicles including:

• Fiat 500 classic and newer models with electronic control systems
• Fiat 500 Abarth
• Fiat Punto and Panda models
• Ford Ka 1.2 (reference 169A4000)

Each catalytic converter is designed to meet EPA and Euro emission standards and fits specific engine displacements and years.

Krosfou offers high-performance, new, original catalytic converters made in Europe with premium materials such as stainless steel INOX 409 and advanced ceramic monoliths with rare metal coatings ensuring superior performance and durability. Key benefits include:

• 3 years warranty covering up to 100,000 km usage
• TÜV SÜD certification guaranteeing manufacturer-grade or better quality
• Compliance with European and federal EPA emission standards
• Free returns within 30 days for unused and original parts
• Direct-from-factory pricing and reliable shipping options

Krosfou also supports professional installation with technical assistance and offers a recycling buy-back service for used parts.

Krosfou provides fast and secure shipping within Europe and internationally:

• Standard Europe delivery: 1 to 6 working days, free over €189 (excl. VAT) for most items
• Express Europe delivery: 24 to 48 hours depending on carrier availability
• International shipping options available with delivery times of 3 to 15 working days
• Orders placed before noon are often shipped the same day if in stock

Returns are accepted within 30 days for unused, original-condition parts delivered within Europe. Return shipping costs may apply outside this policy. All returns require prior approval from Krosfou technical support.

Yes, Krosfou catalytic converters are designed and engineered to meet or exceed strict emission standards:

• Certified with E24-103R and TÜV SÜD approval, ensuring legal compliance within Europe
• EPA compliant for federal emission requirements
• Manufactured to meet Euro 1 or higher emission regulations
• Compatible with vehicles equipped with proper lambda sensors and unleaded fuel
• Designed to maintain optimal engine performance and fuel economy while protecting the environment

Using genuine Krosfou catalytic converters ensures your Fiat 500 meets legal inspection and emission testing requirements, avoiding costly penalties.

For any detailed compatibility, installation, or legal questions, Krosfou offers technical support and documentation accessible to customers.