Does the Lexus RX350 have a catalytic converter?

The Lexus RX350 uses catalytic converters as part of its exhaust emissions control system.

Exhaust emissions are tightly regulated in modern markets, and the RX350’s gasoline engines are equipped with catalytic converters to reduce pollutants before exhaust exits the tailpipe. The exact number and placement can vary by model year and market, but the component is standard on RX350 vehicles today. This article explains what catalytic converters do, where they sit in the RX350, and what owners should know about maintenance and replacement.

What a catalytic converter does

A catalytic converter is a metal housing containing catalysts (typically platinum, palladium, and rhodium) that chemically transform harmful exhaust gases into less- dangerous ones. In a three-way catalytic converter, carbon monoxide and hydrocarbons are converted to carbon dioxide and water, while nitrogen oxides are reduced to nitrogen and oxygen. The system relies on precise engine management and oxygen sensors to operate effectively and to meet emissions standards.

Where the RX350's catalytic converters sit and how many there are

Before listing the typical patterns, note that the exact number and arrangement can vary by model year, engine, and market. In general, the RX350’s exhaust path includes catalytic converters placed along the pipe after the exhaust manifolds, with potential upstream and downstream units depending on generation.

• Upstream catalytic converter: located near the engine to begin pollutant reduction as early as possible in the exhaust stream.


• Downstream catalytic converter(s): placed further back in the exhaust system to provide additional treatment before exhaust leaves the vehicle.


• Multiple converters on some generations: certain RX350 configurations may use more than one catalyst to meet emissions requirements, with the exact count and placement varying by model year and market.

In summary, the RX350’s exhaust system commonly contains one or more catalytic converters along the path from the engine to the tailpipe, though the precise configuration depends on year and market.

Maintenance and replacement considerations

Understanding how catalytic converters are maintained and when they might need attention helps RX350 owners avoid unexpected trips to the shop.

• Signs of possible failure: check engine light, reduced acceleration or power, noticeably poorer fuel economy, a sulfur/rotten-egg smell, rattling sounds from under the vehicle, or a failed emissions test.


• Common causes of failure: contamination from oil or coolant leaks, engine misfires, exhaust leaks, or physical damage; overheating from excessive backpressure can also degrade the catalyst.


• Replacement and costs: catalytic converter replacement can be costly due to the precious metals used in the catalyst; some regions provide emissions-warranty coverage for specific years/mileage, and aftermarket options exist but should comply with local regulations.


• Diagnostics: many issues trigger codes such as P0420 or P0430 (catalyst efficiency), and a qualified technician will inspect the exhaust system and engine sensors before replacing the converter.

Bottom line: if symptoms point to catalytic converter trouble, seek a trained technician. Addressing root causes is important to prevent repeat failures and to stay within emissions compliance.

Summary

Yes—the Lexus RX350 includes catalytic converters as part of its emissions control system. The exact number and placement vary by model year and market, but the converters, along with oxygen sensors and other exhaust components, are designed to meet emissions standards throughout the vehicle’s life. Regular maintenance and prompt attention to warning signs help ensure continued performance and compliance.

How much is a catalytic converter for a Lexus RX350?

The average cost for a Lexus RX350 Catalytic Converter Replacement is between $2,304 and $2,478. Labor costs are estimated between $371 and $544 while parts are typically priced around $1,933.

What is the most common problem with Lexus RX 350?

The most common problem with the Lexus RX 350 is a massive oil leak, specifically from the VVT-i oil line, which can lead to rapid oil loss and potential engine failure, especially in older models like the 2010. Other frequent issues include faulty rain sensors, especially in newer models, resulting in wipers that malfunction randomly. Older model years (2007 and 2010) also show a tendency for airbag warning lights and transmission problems, while some 2016 models experienced rough shifting and transmission issues.
 
This video discusses the 2013 Lexus RX 350's common problems, including oil leaks and other issues: 55scar PROblemsYouTube · Jun 26, 2022
Engine and oil leaks 

• VVT-i oil line leak: This is a recurring issue, particularly in older models like the 2010, where the oil line can burst, causing significant oil loss and potential engine damage if not addressed immediately. 
• Check Engine light: This can be triggered by various engine issues, including problems with the variable valve timing system. 

Electrical and sensor problems 

• Rain sensor malfunction: Both older and newer models have reported issues with the rain-sensing wipers not functioning correctly or stopping randomly. 
• Airbag warning light: This has been reported across several model years, often linked to codes B0111 and B0116 due to issues like faulty sensors or a depleted airbag backup battery. 
• Infotainment system issues: Problems like malfunctioning touchscreens, unresponsive climate controls, and other glitches have been reported, particularly in recent years. 

Transmission and drivetrain issues

• Rough shifting: Some models, such as the 2016, have been reported to have delayed gear shifts and a lack of smoothness.
• Transmission failure: In the 2016 model year, transmission problems were significant enough to cause concerns about long-term reliability. 

Other potential problems

• Spontaneously shattering sunroofs: Though rare, this has been reported in some model years and is a significant safety concern. 
• Body integrity issues: Some older models, such as the 2010, have experienced body-related issues like rattling doors. 
• Steering mechanism leaks: These can be costly to repair. 

Does Lexus have a catalytic converter?

Your Lexus is a sophisticated piece of machinery designed for optimal performance and minimal emissions. A critical component in achieving this balance is the catalytic converter.

Does the Lexus RX 350 have a catalytic converter?

The Lexus RX 350 catalytic converter location is generally found along the exhaust system beneath the vehicle, near the engine and before the muffler.