OP Converters OPCG4135 Catalytic Converter - Rear

Rear Catalytic Converter for Buick LaCrosse and Regal

OP Converters OPCG4135 is a rear catalytic converter for select 2010-2016 Buick LaCrosse and 2012-2015 Buick Regal applications. It is a Federal 47-state part and is not legal for sale in California, New York, or Maine.

Key Features

• Rear catalytic converter for exhaust system repair
• Fits 2010-2016 Buick LaCrosse, rear
• Fits 2012-2015 Buick Regal, rear
• Federal 47-state only application
• Part number: OPCG4135

Detailed Description

OPCG4135 is built for rear-position exhaust service on the Buick LaCrosse and Buick Regal listed below. Use this catalytic converter when the original rear converter is restricted, damaged, or no longer meeting emissions-related performance requirements. This part cross-references no listed alternate part numbers in the provided data. For fitment-based searches, this is a rear catalytic converter for 2010-2016 Buick LaCrosse and 2012-2015 Buick Regal, Federal 47-state only.

What It Is Used For

• Replacing a failed rear catalytic converter
• Addressing exhaust restriction that affects drivability
• Restoring emissions system function after converter damage
• Correcting exhaust leaks or internal substrate failure at the rear converter location

Installation Notes and Tips

Verify the vehicle’s emissions requirements before ordering. This part is not legal for sale in CA, NY, or ME. Confirm rear-position fitment and match the part number OPCG4135 to the application before installation. Inspect adjoining exhaust components, gaskets, and sensors during diagnosis so the root cause is addressed during repair.

Quality Assurance

OP Converters supplies this catalytic converter as a Federal 47-state replacement part for the listed Buick applications. Confirm all fitment details against the vehicle before installation.