What should I know about catalytic converters and their operation, maintenance, and potential issues?

Regarding catalytic converters, it's worth noting that due to a mandated extended warranty covering emissions-related components, it's advisable to consult a dealer service department before replacing the converter at your own cost. The catalytic converter, an emission control device in the exhaust system, reduces pollutants. There are two types: the oxidation catalyst, which reduces hydrocarbon (HC) and carbon monoxide (CO) levels by adding oxygen to the exhaust stream to produce water vapor (H2O) and carbon dioxide (CO2), and the reduction catalyst, which lowers oxides of nitrogen (NOx) levels by removing oxygen to produce nitrogen (N) and oxygen. The two types are combined into a three-way catalyst. Proper oxygen levels are vital for its operation, as it captures and stores oxygen most efficiently when converting exhaust gases mixed at the ideal air/fuel ratio of 14.7:1. Lean or rich air/fuel ratios can impact its function. The PCM monitors the catalyst's oxygen content via upstream and downstream oxygen sensors. If it's not working, the downstream sensor indicates elevated oxygen, prompting a Diagnostic Trouble Code (DTC) and the Malfunction Indicator Light (MIL) activation. Checking the converter requires specialized equipment, but you can check for restricted converters using a vacuum gauge to diagnose the effect of a blocked exhaust on intake vacuum. If damage is found, replacement is necessary. Upstream catalytic converters are integral to the exhaust manifold. Replacement procedures vary by model year and engine type. Always ensure the catalytic converter has cooled before servicing.

Genuine Lexus RX330 Catalytic Converter

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6 Catalytic Converters found

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Lexus RX330 Exhaust Manifold Converter Sub-Assembly, No.2
Part Number: 25052-20190
$569.75 MSRP: $671.64
You Save: $101.89 (16%)
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Product Specifications
- Other Name: Converter Sub-Assy, Exhaust Manifold, No.2; Exhaust Manifold, Manifold
- Manufacturer Note: *115=TOYOTA/03-/Y
- Warranty: This genuine part is guaranteed by Lexus's factory warranty.
Fits the following Vehicles:
- 2004-2006 Lexus RX330 | STD | 6 Cyl 3.3L | 3MZFE; 3MZFE; MCU33L-AWAGKA, MCU33L-CWAGKA, MCU38L-AWAGKA, MCU38L-CWAGKA
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Lexus RX330 Exhaust Manifold Converter Sub-Assembly
Part Number: 25051-20040
$598.91 MSRP: $706.01
You Save: $107.10 (16%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Converter Sub-Assy, Exhaust Manifold; Exhaust Manifold, Manifold
- Manufacturer Note: *115=TOYOTA/03-/Y
- Warranty: This genuine part is guaranteed by Lexus's factory warranty.
Fits the following Vehicles:
- 2004-2006 Lexus RX330 | STD | 6 Cyl 3.3L | 3MZFE; 3MZFE; MCU33L-AWAGKA, MCU33L-CWAGKA, MCU38L-AWAGKA, MCU38L-CWAGKA
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Lexus RX330 Front Exhaust Pipe Assembly
Part Number: 17410-0P180
$269.24 MSRP: $341.83
You Save: $72.59 (22%)
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Product Specifications
- Other Name: Pipe Assy, Exhaust, Front; Front Pipe
- Position: Front
- Replaces: 17410-31660
- Warranty: This genuine part is guaranteed by Lexus's factory warranty.
Fits the following Vehicles:
- 2006 Lexus RX330 | STD | 6 Cyl 3.5L | 2GRFE; 2GRFE; GSU30L-AWAGKA, 2GRFE; GSU30L-CWAGKA, GSU35L-AWAGKA, GSU35L-CWAGKA
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Lexus RX330 Front Exhaust Pipe Assembly
Part Number: 17410-31660
$273.73 MSRP: $341.83
You Save: $68.10 (20%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Pipe Assy, Exhaust, Front
- Position: Front
- Replaced by: 17410-0P180
- Warranty: This genuine part is guaranteed by Lexus's factory warranty.
Fits the following Vehicles:
- 2006 Lexus RX330 | STD | 6 Cyl 3.5L | 2GRFE; 2GRFE; GSU30L-AWAGKA, GSU35L-AWAGKA
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Lexus RX330 Front Exhaust Pipe Assembly
Part Number: 17410-20450
$249.47 MSRP: $316.72
You Save: $67.25 (22%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Pipe Assy, Exhaust, Front; Front Pipe
- Position: Front
- Warranty: This genuine part is guaranteed by Lexus's factory warranty.
Fits the following Vehicles:
- 2004-2006 Lexus RX330 | STD | 6 Cyl 3.3L | 3MZFE; 3MZFE; MCU33L-AWAGKA, MCU38L-AWAGKA
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Lexus RX330 Front Exhaust Pipe Assembly
Part Number: 17410-0A410
Product Specifications
- Other Name: Pipe Assy, Exhaust, Front; Front Pipe
- Position: Front
- Warranty: This genuine part is guaranteed by Lexus's factory warranty.
Fits the following Vehicles:
- 2004-2006 Lexus RX330 | STD | 6 Cyl 3.3L | 3MZFE; 3MZFE; MCU33L-CWAGKA, MCU38L-CWAGKA

Lexus RX330 Catalytic Converter

Catalytic Converter is the one of the most important components of the emission system, which is used in Lexus RX330 to lessen the dangerous gases emissions such as Carbon Monoxide, Hydrocarbons, and Oxides of Nitrogen into harmless byproducts such as Water Vapor, Carbon Dioxide, and Nitrogen. This device has the reactivity feature that enables the reactivity within the device without getting affected. Since converter is dependent on the engine performance and efficiency the likelihood of misfires and lean, rich air fuel mixture and burning of oil lowers the rate of conversion. For better performance, high flow performance catalytic converters are produced having a monolithic honeycomb substrate to coat the catalyst materials such as platinum, palladium, and rhodium. These converters are made in a way that they offer the prime oxidation and reduction, with direct fit and universal which makes it easy to fit them.

Should you need to purchase new auto parts for your vehicle, we strongly suggest you consider the genuine Lexus RX330 Catalytic Converter available on LexusPartsNow.com. Our OEM Lexus RX330 Catalytic Converter come with the reassurance of the manufacturer's warranty, a hassle-free return policy, and speedy delivery service, all at affordable prices online. Feel free to shop with confidence!

Lexus RX330 Catalytic Converter Parts Questions & Experts Answers

Exhaust Manifold Converter Sub-Assembly
25051-20040
Q: What should I know about catalytic converters and their operation, maintenance, and potential issues?
A: Regarding catalytic converters, it's worth noting that due to a mandated extended warranty covering emissions-related components, it's advisable to consult a dealer service department before replacing the converter at your own cost. The catalytic converter, an emission control device in the exhaust system, reduces pollutants. There are two types: the oxidation catalyst, which reduces hydrocarbon (HC) and carbon monoxide (CO) levels by adding oxygen to the exhaust stream to produce water vapor (H2O) and carbon dioxide (CO2), and the reduction catalyst, which lowers oxides of nitrogen (NOx) levels by removing oxygen to produce nitrogen (N) and oxygen. The two types are combined into a three-way catalyst. Proper oxygen levels are vital for its operation, as it captures and stores oxygen most efficiently when converting exhaust gases mixed at the ideal air/fuel ratio of 14.7:1. Lean or rich air/fuel ratios can impact its function. The PCM monitors the catalyst's oxygen content via upstream and downstream Oxygen Sensors. If it's not working, the downstream sensor indicates elevated oxygen, prompting a Diagnostic Trouble Code (DTC) and the Malfunction Indicator Light (MIL) activation. Checking the converter requires specialized equipment, but you can check for restricted converters using a vacuum gauge to diagnose the effect of a blocked exhaust on intake vacuum. If damage is found, replacement is necessary. Upstream catalytic converters are integral to the exhaust manifold. Replacement procedures vary by model year and engine type. Always ensure the catalytic converter has cooled before servicing.