Catalytic Converter for Buick Enclave (2009-2017) 3.6L Front Left & Right & Rear

Direct-Fit Complete Catalytic Converter Set for 2009-2017 Buick Enclave (Lambda Platform)

What it Does: The catalytic converter set replaces deteriorated factory emissions components on the 2009-2017 Buick Enclave to restore exhaust scavenging efficiency, eliminate P0420/P0430 diagnostic trouble codes, and ensure 46-state emissions compliance.

The Stock Buick Enclave Exhaust Degradation and Washcoat Erosion

Factory manifold-mounted catalytic converters on the GM Lambda platform endure continuous thermal cycling and exhaust gas reversion from the High Feature LLT/LFX 3.6L V6. Over extended mileage, unburned hydrocarbons and high exhaust gas temperatures cause internal ceramic washcoat degradation and substrate melt-down. Additionally, thermal expansion leads to hairline cracking at the factory manifold transitions and flex joints, inducing exhaust leaks, false downstream oxygen sensor readings, reduced fuel economy, and persistent check engine lights.

The Engineering Solution

This 3-piece assembly—encompassing the front left, front right (radiator and firewall banks), and rear underfloor units with an integrated flex pipe—features mandrel-bent, high-grade stainless steel tubing for uniform wall thickness and corrosion resistance. High-flow ceramic substrates loaded with washcoat precious metals promote rapid light-off and efficient catalytic conversion without choking high-RPM gas velocity. Heavy-gauge flanges and automated TIG welds prevent exhaust leaks, mating directly to stock exhaust manifolds and cat-back piping without cutting or custom fabrication.

Technical Specifications

Compatibility

• 2009-2017 Buick Enclave Base 3.6L V6
• 2009-2017 Buick Enclave CX 3.6L V6
• 2009-2017 Buick Enclave CXL 3.6L V6
• 2014-2017 Buick Enclave Convenience 3.6L V6
• 2014-2017 Buick Enclave Leather 3.6L V6
• 2014-2017 Buick Enclave Premium 3.6L V6

Frequently Asked Questions

Does this fit the Lambda Enclave?

Yes, this is a direct fit for the 2009-2017 Buick Enclave equipped with the 3.6L High Feature V6 engine.

Will this unit clear downstream catalyst efficiency codes (P0420/P0430)?

Yes, the OE-grade ceramic core restores OEM-level reduction and oxidation efficiency to clear P0420 and P0430 DTCs provided underlying misfires or sensor issues are resolved.

The Buick Reliability Standard

Engineered to handle sustained highway cruising and passenger-load thermal stresses, this direct-fit stainless assembly ensures structural durability, leak-free cabin isolation, and reliable emissions compliance for the life of your luxury crossover.