Catalytic Converter for Jaguar XJ (2013-2017) 3.0L

Direct-Fit Stainless Catalytic Converter Pair for 2013-2017 Jaguar XJ (X351)

What it Does: This direct-fit left and right catalytic converter pair restores exhaust flow and emissions control on the 2013-2017 Jaguar XJ X351 with the AJ126 3.0L Supercharged V6.

The Stock Jaguar XJ Catalyst Failure

On the X351 chassis equipped with the AJ126 3.0L Supercharged V6, sustained thermal load and heat soak degrade the factory ceramic substrate. Thermal shock eventually fractures the internal honeycomb brick and depletes its precious-metal washcoat. Unconverted exhaust gas then triggers P0420 and P0430 catalyst-efficiency fault codes at the downstream O2 sensors. Loose substrate fragments also rattle inside the shell and choke exhaust scavenging.

Common Symptoms of a Failing OEM Catalytic Converter

• Check Engine Light / DTCs: Triggers P0420/P0430 from depleted oxygen storage.
• Metallic Rattle: Audible buzzing under load from a fractured core.
• Backpressure & Compliance: Choked exhaust flow and failed emissions tests.

The Direct-Fit Stainless Catalytic Converter Solution

This complete left and right assembly replaces both banks using stainless steel bodies and pipes that resist rust and heat cracking. Each 8-inch-long by 5-inch-tall canister houses a ceramic honeycomb substrate with a precious-metal washcoat for efficient HC, CO, and NOx conversion. Factory flanges, mounting brackets, and pre- and post-catalyst O2 sensor bungs provide bolt-on geometry. This EPA Federal OBD-II unit restores flow without cutting or welding.

What's Included

• 2 x Catalytic Converter Pipes (Left and Right)
• Bolts, Nuts, and Washers

Technical Specifications

Compatibility

• 2013-2017 Jaguar XJ & XJL 3.0L Supercharged V6 (RWD & AWD)
• Compatible Trims: Base, Premium, Portfolio, R-Sport

Frequently Asked Questions & Fitment Warnings

Does this fit the X351 XJ?

Yes. This is a direct fit for the 2013-2017 Jaguar XJ equipped with the AJ126 3.0L Supercharged V6 engine (including XJL and AWD). Excludes the 5.0L V8; not CARB-legal for vehicles registered in CA, NY, CO, or ME.

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

Yes, if the converter failed, though O2 sensors are excluded. Reuse or replace sensors in the factory bungs after inspecting for upstream exhaust leaks.

What hardware is included for installation?

Bolts, nuts, and washers are included. Apply penetrating oil to cool manifold bolts, install new gaskets, and torque fasteners evenly.

The Jaguar Precision Standard

Built for accurate ECU emissions feedback and CEL-free operation on the X351, this pair restores balanced flow. Replacing both banks protects fuel-trim stability.