Catalytic Converter for Buick Regal (2011-2015) 2.4L

Direct-Fit Catalytic Converter for 2011-2015 Buick Regal

What it Does: Restores factory exhaust scavenging efficiency and eliminates P0420 catalyst efficiency diagnostic trouble codes on 2.4L Ecotec-powered vehicles.

The Stock Regal Converter Failure Point

Over extended heat cycles, the factory ceramic washcoat on the Epsilon II platform Regal experiences thermal degradation, substrate breakdown, and carbon poisoning from direct-injection blow-by. This degradation increases exhaust backpressure, restricts high-RPM cylinder evacuation, and triggers recurring catalytic efficiency check engine lights.

The Engineering Solution

Constructed with a heavy-gauge stainless steel outer shell and a durable ceramic honeycomb substrate, this direct replacement converter provides optimal precious metal loading for thorough hydrocarbon and NOx reduction. Precision robotic-welded flanges and pre-threaded post-catalyst oxygen sensor bungs ensure leak-free alignment to the factory downpipe geometry without cutting or custom fabrication.

Technical Specifications

Compatibility

• 2011 Buick Regal (2.4L L4 - Base, CXL)
• 2012 Buick Regal (2.4L L4 - Base, Premium)
• 2013 Buick Regal (2.4L L4 - Base, Premium)
• 2014 Buick Regal (2.4L L4 - Base, Premium)
• 2015 Buick Regal (2.4L L4 - Base, Premium)

The Buick Reliability Standard

Engineered to precise GM tolerances to prevent check engine lights, restore balanced backpressure, and ensure smooth, quiet cabin operation under all driving conditions.