Catalytic Converter for Volvo S80 (2004-2006) 2.5L

Direct-Fit Stainless Catalytic Converter for 2004-2006 Volvo S80 (P2)

What it Does: This direct-fit catalytic converter restores exhaust emissions conversion and proper backpressure regulation on the 2004-2006 Volvo S80 2.5T (P2 chassis) equipped with the B5254T2 2.5L turbocharged inline-five engine.

The Stock Volvo S80 Exhaust Restriction & Substrate Failure

High exhaust gas temperatures from the B5254T2 turbocharger gradually degrade the OEM ceramic brick inside the P2 chassis converter. Over repeated thermal cycles, oil consumption, or minor ignition misfires, unburned fuel ignites inside the shell, causing substrate fracture and washcoat poisoning. Once the internal honeycomb breaks apart or melts, exhaust backpressure spikes while HC, CO, and NOx conversion drops below threshold. This triggers persistent P0420 catalyst efficiency faults and restricts turbo spool.

Common Symptoms of a Failing OEM Catalytic Converter

• Check Engine Light / DTCs: Triggers P0420 or P0430 catalyst efficiency codes when the downstream O2 sensor mirrors upstream oxygen swings.
• Exhaust Rattle Under Load: Fractured internal ceramic substrate vibrates audibly inside the housing during cold starts and deceleration.
• Sluggish Boost & Emissions Failure: Collapsed honeycomb cells choke exhaust flow, increasing backpressure and causing failed tailpipe inspections.

The Direct-Fit Stainless Catalytic Converter Solution

Engineered specifically for the P2 S80 2.5T, this one-piece converter pipe replaces the failed factory assembly without cutting or welding. Its corrosion-resistant stainless steel body (8 in length, 5 in height) houses a ceramic honeycomb substrate with a precious-metal washcoat for OBD-II emissions compliance. Factory-spec flanges, hanger brackets, an integrated flex joint, and two O2 sensor ports (pre- and post-catalyst) ensure leak-free alignment with your B5254T2 exhaust system.

What's Included

• 1 x Catalytic Converter (One-Piece Pipe with Flex Joint and Hanger Brackets)
• 1 x 2-Bolt Flange Gasket
• 1 x 3-Bolt Flange Gasket

Technical Specifications

Compatibility

• 2004 Volvo S80 2.5T (FWD and AWD) - 2.5L Turbocharged I5 (B5254T2)
• 2005 Volvo S80 2.5T (FWD and AWD) - 2.5L Turbocharged I5 (B5254T2)
• 2006 Volvo S80 2.5T (FWD and AWD) - 2.5L Turbocharged I5 (B5254T2)
• Exclusions: Does not fit S80 2.9L, T6, or 2007+ models. Not legal for vehicles registered in California, New York, Colorado, or Maine.

Frequently Asked Questions & Fitment Warnings

Does this fit the P2 S80?

Yes. This is a direct fit for the 2004-2006 Volvo S80 2.5T (FWD and AWD) equipped with the B5254T2 engine. It does not fit the S80 2.9L, T6, or 2007+ models, and it is EPA federal compliant only (not CARB approved for CA, NY, CO, or ME).

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

Yes, when caused by a worn converter. Installing a new unit restores catalyst efficiency to clear P0420 and P0430 codes, though O2 sensors are not included and must be transferred or replaced after checking for exhaust leaks.

Are gaskets and mounting hardware included for installation?

Flange gaskets are included. The box contains both the 2-bolt flange gasket and 3-bolt flange gasket; soak seized fasteners with penetrating oil, torque flange bolts evenly, and inspect every joint for exhaust leaks after startup.

The Volvo Emissions Precision Standard

Calibrated to support tight ECU fuel-trim and oxygen-storage monitoring on European turbocharged platforms, this replacement unit restores factory catalyst efficiency and OBD-II readiness. Expect rattle-free exhaust flow and consistent CEL-free operation in daily service.