How many catalytic converters does a Lexus RX 330 have?
Two catalytic converters — one for each bank of the V6 — are installed in the Lexus RX 330's exhaust system.
The RX 330 uses a 3.3-liter V6 engine and employs a dual-bank catalytic setup to control emissions per bank. This arrangement is common in Toyota/Lexus V6 designs and affects parts replacement and diagnostics. The exact configuration can vary by model year and market, so consult the owner’s manual or a service diagram for your vehicle's specifics.
Catalytic converter layout
Here are the core layout details for the RX 330's catalytic converters.
- Count: 2 catalytic converters (one on each bank).
- Location: mounted on the exhaust manifolds for the left and right banks of the engine, feeding into the downstream exhaust path.
- Function: each bank's converter processes exhaust gases independently to reduce pollutants before they join the rest of the exhaust system.
- Replacement considerations: converters can be replaced per bank; many owners replace or service both banks if one side fails for symmetry and emissions compliance.
- Sensor context: typically paired with upstream and downstream oxygen sensors for each bank to monitor catalytic efficiency.
In practical terms, most RX 330 owners will encounter two catalytic converters when inspecting or replacing components, and the system's sensors are arranged to monitor each bank separately.
Model years and variations
In the United States, the Lexus RX 330 was produced roughly from 2004 to 2006 (with some markets extending similar configurations). The basic two-cat layout on the 3.3L V6 RX 330 remains standard across these years, though regional emissions regulations can influence sensor placement and related components. Always verify with the specific VIN and service manual for your vehicle.
Maintenance considerations
When replacing catalytic converters, remember that the exhaust system includes multiple sensors and wiring that must align with each bank’s catalysts. Improper replacement or mismatched parts can trigger emissions faults. Consider OEM or approved aftermarket parts and have a qualified technician perform diagnostics and installation.
Summary: The Lexus RX 330 is equipped with two catalytic converters—one for each bank of its 3.3-liter V6. This dual-bank arrangement is complemented by sensors that monitor each converter's performance, and replacement is typically performed per bank in maintenance scenarios. Always confirm exact configuration for your vehicle’s year and market using the VIN or service documentation.
