Catalytic Converter for Hyundai Sonata Hybrid (2016-2018) 2.0L

Direct-Fit Exhaust Manifold Catalytic Converter for 2016-2018 Hyundai Sonata (LF)

What it Does: This integrated exhaust manifold catalytic converter bolts directly to the cylinder head on the 2016-2018 Hyundai Sonata Hybrid (LF) G4NG 2.0L engine to restore emissions conversion and clear catalyst-efficiency fault codes.

The Stock Hyundai Sonata Hybrid Catalytic Converter Failure

On the LF chassis equipped with the G4NG 2.0L hybrid powertrain, frequent engine start-stop cycling accelerates thermal shock across the factory close-coupled manifold converter. Over time, repeated heat soak and expansion stress fracture the OEM ceramic monolith, causing internal substrate breakup and washcoat degradation. Once catalyst oxygen storage capacity drops below ECU thresholds, the PCM logs P0420/P0430 codes while loose ceramic chunks create exhaust flow restrictions and audible metallic rattling.

Common Symptoms of a Failing OEM Catalytic Converter

• Check Engine Light & Catalyst DTCs: Triggered P0420/P0430 fault codes caused by degraded post-cat oxygen sensor switching and depleted precious-metal washcoat efficiency.
• Metallic Exhaust Rattle: Audible buzzing or knocking from the engine bay manifold area produced by a fractured ceramic substrate vibrating inside the converter shell.
• Backpressure & Emissions Failure: Sluggish throttle response, elevated exhaust backpressure, and failed state emissions testing due to obstructed honeycomb passages.

The Direct-Fit Stainless Catalytic Converter Solution

Constructed with corrosion-resistant stainless steel tubing and an integrated cylinder-head flange, this direct-fit assembly resists thermal cracking and exhaust rust. Internally, a high-flow ceramic honeycomb substrate with a precious-metal washcoat efficiently converts HC, CO, and NOx emissions to meet EPA federal standards. Factory-positioned pre- and post-catalyst O2 sensor bungs (2 ports), an 8-inch body length, and a 5-inch body height deliver true bolt-on clearance without cutting or welding.

What's Included

• 1 x Exhaust Manifold Catalytic Converter
• 1 x Exhaust Manifold Gasket
• 1 x 2-Bolt Flange Gasket
• 2 x Studs with Nuts

Technical Specifications

Compatibility

• 2016-2018 Hyundai Sonata Hybrid (2.0L I4 Hybrid)
• 2016-2018 Hyundai Sonata Plug-In Hybrid (2.0L I4 Hybrid)
• Excludes non-hybrid 1.6L Turbo, 2.0L Turbo, and 2.4L Sonata models

Frequently Asked Questions & Fitment Warnings

Does this fit the LF Sonata?

Yes. This is a direct fit for the 2016-2018 Hyundai Sonata Hybrid and Plug-In Hybrid equipped with the G4NG 2.0L engine. It does not fit non-hybrid 1.6L Turbo, 2.0L Turbo, or 2.4L engines, and is EPA federal compliant only—not CARB approved or 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-related codes; O2 sensors are not included. Replacing a degraded converter restores catalyst efficiency to clear P0420/P0430 codes once existing sensors are transferred or replaced and exhaust leaks are ruled out.

Are gaskets and mounting hardware included for installation?

Yes. The kit includes a new manifold gasket, 2-bolt outlet flange gasket, and two studs with nuts; allow the exhaust to cool, soak seized fasteners with penetrating oil, and torque all joints evenly.

The Hyundai Emissions Precision Standard

Engineered for hybrid thermal cycling and strict OBD-II monitor readiness, this direct-fit manifold converter restores factory backpressure and CEL-free operation. Expect dependable emissions compliance and leak-free sealing under daily driving conditions.