Catalytic Converter for Fiat 500 (2015-2019) 1.4L Front

Direct-Fit Stainless Front Catalytic Converter for 2015-2019 Fiat 500 (312)

What it Does: This direct-fit front catalytic converter bolts directly behind the turbocharger on the 2015-2019 Fiat 500 (312) equipped with the EAF 1.4L MultiAir Turbo I4 to convert HC, CO, and NOx emissions while restoring unimpeded exhaust flow.

The Stock Fiat 500 Front Catalytic Converter Failure

Mounted directly downstream of the turbocharger on the 312 chassis, the factory front converter endures severe exhaust gas temperatures and rapid thermal cycling from the EAF 1.4L MultiAir Turbo I4. Over time, repeated heat soak and rich-running boost transitions degrade the precious-metal washcoat and fracture the internal ceramic substrate. Once the monolith breaks apart inside the shell, loose fragments restrict exhaust scavenging, elevate turbo backpressure, and trigger P0420 or P0430 catalyst efficiency faults.

Common Symptoms of a Failing OEM Front Catalytic Converter

• Check Engine Light / DTCs: Stored P0420 or P0430 catalyst efficiency codes when downstream O2 sensor readings mirror upstream switching.
• Metallic Exhaust Rattle: Audible buzzing or rattling from behind the turbocharger at idle or deceleration caused by a fractured ceramic substrate.
• Restricted Turbo Spool & Emissions Failure: Sluggish boost response from elevated exhaust backpressure and failed OBD-II readiness inspections.

The Direct-Fit Stainless Catalytic Converter Solution

Built with a corrosion-resistant stainless steel body and piping, this direct-fit replacement handles high turbocharger outlet temperatures without rust or heat cracking. Inside the 10-inch by 5-inch housing, a ceramic honeycomb substrate coated with precious-metal washcoat restores proper HC, CO, and NOx conversion for OBD-II compliance. Factory-style turbo and rear 2-bolt flanges, integrated mounting brackets, and an OEM-spec oxygen sensor bung allow a clean bolt-on installation with zero cutting or welding.

What's Included

• 1 x Front Catalytic Converter
• 1 x 2-Bolt Flange Gasket
• 1 x Ring Seal

Technical Specifications

Compatibility

• 2015, 2016, 2017, 2018, 2019 Fiat 500 Hatchback & Convertible — 1.4L Turbocharged I4 (Front Position)
• Fits Abarth, Turbo, and other turbocharged 1.4L trims
• Excludes naturally aspirated (non-turbo) 1.4L Fiat 500 models

Frequently Asked Questions & Fitment Warnings

Does this fit the 312 500?

Yes. This is a direct fit for the 2015-2019 Fiat 500 equipped with the EAF 1.4L MultiAir Turbo I4 engine. Does not fit non-turbo 1.4L models. EPA federal compliant only—not CARB approved and not legal for vehicles registered in California, New York, Colorado, or Maine.

Will this clear P0420/P0430 codes, and are O2 sensors included?

Yes, it resolves catalyst-efficiency codes caused by a depleted converter. Oxygen sensors are not included; transfer your existing sensors or install new units after verifying there are no upstream exhaust leaks.

Are gaskets and mounting hardware included for installation?

Yes, the required 2-bolt flange gasket and ring seal are included. Soak rusted turbo and bracket fasteners with penetrating oil, allow the exhaust to cool completely, and torque all joints evenly to prevent leaks.

The Fiat Precision Standard

Built to match factory 312 exhaust geometry and ECU emissions thresholds, this converter restores clean catalyst conversion and dependable turbocharger flow. Keep your turbocharged Fiat 500 operating CEL-free and inspection-ready across all 46 EPA federal states.