Citroen ZX Catalytic Converter (1991-1998)

The catalytic converter of the Citroën ZX petrol models (1992-1996) is a vital component of the exhaust system. It reduces harmful emissions by chemically converting toxic gases like nitrogen oxides, carbon monoxide, and unburned hydrocarbons into less damaging compounds such as carbon dioxide and nitrogen. This helps the vehicle comply with environmental standards and lowers pollution levels.

The catalytic converter operates through chemical catalysis. Exhaust gases pass through a honeycomb ceramic structure coated with precious metals (platinum, rhodium, palladium) which trigger reactions starting at around 400°C engine temperature. For the petrol engine in the Citroën ZX, it performs three key conversions:

• Nitrogen oxides (NOx) into nitrogen (N₂) and carbon dioxide (CO₂).
• Carbon monoxide (CO) into carbon dioxide (CO₂).
• Unburned hydrocarbons (HC) into water vapor (H₂O) and carbon dioxide.

This process is effective only when the engine and catalytic converter are fully warmed up, typically ineffective during short trips or cold starts.

The catalytic converter is installed on petrol versions of the Citroën ZX produced between 1992 and 1996. It is located between the exhaust manifold and the silencer and can be replaced when needed. The vehicle must originally be equipped with this system to comply with regulations.

• Applicable to petrol engines 1.4, 1.6, and 2.0 liters for these model years.
• Removal of the catalytic converter is illegal in France and carries penalties including fines and mandatory vehicle inspection retesting.

When the catalytic converter is faulty, several symptoms may appear indicating it is clogged or damaged:

• Dashboard engine warning light illuminates.
• Loss of engine power or jerky acceleration (limp mode).
• Increased fuel consumption.
• Distinct rotten egg smell (sulfur odor) due to clogging.
• Engine stalls caused by excessive exhaust back-pressure.

DIY replacement is possible with the right tools and precautions. The basic steps include:

• Safely lift the vehicle and secure it.
• Remove the exhaust system fixings to access the catalytic converter.
• Replace with a compatible new catalytic converter (check OEM or equivalent references).
• Tighten all fixings to the specified torque to avoid leaks.

Necessary tools include wrenches, supports, and new gaskets. Ensure the engine is cool to avoid burns, and check oil levels to prevent overheating. Follow proper handling and installation instructions for best results.

In France and most of Europe, catalytic converters are legally required on petrol vehicles like the Citroën ZX. Removing or tampering with them is illegal and subject to fines ranging from 750€ to 3750€, as well as mandatory technical inspections. These devices must comply with the E24-103R certification to guarantee conformity with European pollution standards.

• Only original or certified compatible catalytic converters meet legal standards.
• Maintaining a functional catalytic converter contributes to reduced emissions and environmental protection.

Krosfou offers catalytic converters that comply with the highest European manufacturing standards, produced in Poland with reliable materials and technologies. Every product comes with a 3-year warranty covering up to 100,000 km of standard use. The warranty requires proper installation by professionals with following guidelines for sensors and gaskets replacement.

• Products feature genuine 100% European manufacturing with E24-103R certification.
• Warranty does not cover damage from negligence, improper use, or clogged catalytic converters.
• Timely replacement of related sensors like the Lambda sensor is recommended.

This ensures long-lasting quality and compliance with vehicle requirements.

For further technical details, manuals, and tutorial guidance, consider the following resources:

• Official technical manual RTA 724 for Citroën ZX petrol models (1992-1996).
• Step-by-step replacement guides and videos available on automotive enthusiast sites.
• Automotive forums like Planète-Citroën provide owner experiences and advice.
• Consult with professional garages specializing in exhaust system maintenance for precise diagnostics and replacements.

The proper use of references and compatibility verification by engine type (1.4 / 1.6 / 2.0 petrol) is essential for quality results.

Always ensure that your vehicle complies with local emission regulations.