Catalytic Converter for Toyota Sienna (2001-2003) 3.0L Rear Left & Right

Direct-Fit Rear Catalytic Converter Assembly for 2001-2003 Toyota Sienna

What it Does: The Direct-Fit Rear Catalytic Converter Assembly restores factory exhaust scavenging and emissions compliance on the 2001-2003 Toyota Sienna 3.0L to eliminate P0420 and P0430 diagnostic trouble codes.

The Stock Toyota Sienna Catalyst Deterioration

Factory exhaust assemblies on the first-generation XL10 chassis suffer from thermal fatigue and washcoat sintering after prolonged mileage. In the 1MZ-FE 3.0L V6, extended thermal cycling and oil vapor carryover break down the internal noble-metal matrix, leading to honeycombed substrate clogging, unmetered backpressure accumulation, reduced fuel efficiency, and recurring catalyst threshold DTCs.

The Engineering Solution

Constructed from heavy-duty tubular steel with a high-porosity ceramic core, this rear left and right catalytic assembly delivers rapid light-off response and optimal chemical conversion of CO, HC, and NOx. Designed for direct OE-position fitment, it integrates precision-cut, leak-free flanges and factory-spec hanger placement without cutting or custom fabrication. The kit includes installation-grade flange bolts, mounting nuts, tension springs, and crush gaskets to guarantee an airtight exhaust seal against corrosive exhaust gas leaks.

Technical Specifications

Compatibility

• 2001 Toyota Sienna CE, LE, XLE 3.0L V6 (Rear Left & Right)
• 2002 Toyota Sienna CE, LE, XLE, Symphony 3.0L V6 (Rear Left & Right)
• 2003 Toyota Sienna CE, LE, XLE 3.0L V6 (Rear Left & Right)

Frequently Asked Questions

Does this fit the XL10 Sienna?
Yes, this is a direct fit for the 2001-2003 Toyota Sienna XL10 chassis equipped with the 1MZ-FE 3.0L V6 engine.

Will this resolve downstream oxygen sensor check engine lights?
Yes, replacing a degraded factory substrate with this complete assembly restores proper catalytic efficiency and clears active P0420/P0430 DTC faults when O2 sensors are functioning properly.

The Toyota Reliability Standard

Engineered to match OEM duty-cycle demands, this assembly maintains factory backpressure limits to protect internal valves, optimize fuel trim parameters, and ensure dependable cross-country durability for family transport.