Catalytic Converter for Fiat 500X (2016-2018) 1.4L Front

Direct-Fit Front Catalytic Converter for 2016-2018 Fiat 500X (334)

What it Does: This direct-fit front catalytic converter restores EPA-compliant emissions control and clears catalyst efficiency codes on the 2016-2018 Fiat 500X (334) 1.4L MultiAir Turbo I4.

The Stock Fiat 500X Catalytic Converter Failure

Mounted directly behind the turbocharger on the 334 chassis with the 1.4L MultiAir Turbo I4 (EAM), the factory front catalytic converter endures extreme heat soak and thermal cycling. Repeated temperature spikes degrade the precious-metal washcoat and fracture the internal ceramic brick. Once broken apart, loose substrate pieces rattle inside the shell, choke exhaust flow, and trigger P0420 or P0430 catalyst efficiency fault codes.

Common Symptoms of a Failing OEM Catalytic Converter

• Check Engine Light (DTCs): Triggers P0420 or P0430 when downstream O2 sensors detect insufficient oxygen storage.
• Metallic Exhaust Rattle: Fractured internal ceramic honeycomb clatters inside the shell at idle or deceleration.
• Exhaust Backpressure & Emissions Failure: Collapsed substrate media restricts turbo spool and fails OBD-II readiness checks.

The Direct-Fit Stainless Exhaust Solution

This direct-fit converter uses a stainless steel body (10 in length, 5 in height) and heavy-duty piping to resist rust and thermal cracking. Inside, a ceramic honeycomb substrate with a precious-metal washcoat restores HC, CO, and NOx conversion for proper OBD-II operation. Factory flanges, mounting brackets, and an OEM-spec sensor bung bolt directly between the turbo joint and rear 2-bolt flange without cutting or welding.

What's Included

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

Technical Specifications

Compatibility

• Make: Fiat
• Model: Fiat 500X 1.4L Turbo (Pop, Sport, Trekking)
• Years: 2016, 2017, 2018
• Engine & Position: 1.4L turbocharged I4 — Front position (Excludes 2.4L)

Frequently Asked Questions & Fitment Warnings

Does this fit the 334 500X?

Yes. Fits 2016-2018 Fiat 500X Pop, Sport, and Trekking trims with the 1.4L MultiAir Turbo I4 (EAM) engine. Not compatible with 2.4L engines; EPA Federal converter is not CARB approved for CA, NY, CO, or ME.

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

Yes, when caused by a worn converter; O2 sensors are not included. Transfer your existing oxygen sensors or install new units after verifying zero exhaust leaks.

Are gaskets included for bolt-on installation?

Yes. Includes a 2-bolt flange gasket and ring seal. Let the exhaust cool, soak fasteners with penetrating oil, and torque evenly.

The Fiat Precision Standard

Engineered to maintain strict Euro ECU air-fuel trim accuracy and OBD-II monitor readiness. Restore factory exhaust flow and CEL-free operation without custom fabrication.