What is a catalytic converter and how is it checked and replaced on Lexus ES300?

The catalytic converter is an emission control device in the exhaust system that reduces pollutants. There are two types: oxidation catalyst, which reduces HC and CO levels, and three-way catalyst, which also decreases NOx. Checking the converter requires expensive equipment. During underbody servicing, inspect for leaks, corrosion, and damage. If any damage is found, replace the converter. To diagnose a restricted converter, use a vacuum gauge to assess the impact of a blocked exhaust on the intake vacuum. Connect the gauge to a vacuum source, warm the engine, and note the vacuum reading at idle and after opening the throttle. If the reading is more than one in-Hg lower after the fourth test, there may be a restriction. When replacing the converter, spray the nuts on the exhaust flange studs before removing them, and then proceed to remove the nuts and separate the converter from the exhaust system. The installation process is the reverse of the removal procedure.

Genuine Lexus ES300 Catalytic Converter

Cat. Converter

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17 Catalytic Converters found

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Lexus ES300 Exhaust Manifold Converter Sub-Assembly, No.2
Part Number: 25052-20210
$686.75 MSRP: $809.56
You Save: $122.81 (16%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Converter Sub-Assy, Exhaust Manifold, No.2; Exhaust Manifold
- Warranty: This genuine part is guaranteed by Lexus's factory warranty.
Fits the following Vehicles:
- 2003 Lexus ES300 | 6 Cyl 3.3L | 3MZFE; MCV31L-BEAGKA
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Lexus ES300 Exhaust Manifold Converter Sub-Assembly, No.2
Part Number: 25052-20140
$617.82 MSRP: $728.31
You Save: $110.49 (16%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Converter Sub-Assy, Exhaust Manifold, No.2
- Manufacturer Note: TYPE A:REFER TO ILLUSTRATION
- Replaced by: 25052-20170
- Warranty: This genuine part is guaranteed by Lexus's factory warranty.
Fits the following Vehicles:
- 2002-2003 Lexus ES300 | 6 Cyl 3.0L | 1MZFE; MCV30L-BEAGKA
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Lexus ES300 Exhaust Manifold Converter Sub-Assembly, No.2
Part Number: 25052-20020
$366.28 MSRP: $424.70
You Save: $58.42 (14%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Converter Sub-Assy, Exhaust Manifold, No.2
- Manufacturer Note: CALIFORNIA SPEC
- Warranty: This genuine part is guaranteed by Lexus's factory warranty.
Fits the following Vehicles:
- 1997-2000 Lexus ES300 | 6 Cyl 3.0L | 1MZFE; MCV20L-BTPGKA, MCV20L-BTPGKK
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Lexus ES300 Exhaust Manifold Converter Sub-Assembly, No.2
Part Number: 25052-20160
$617.82 MSRP: $728.31
You Save: $110.49 (16%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Converter Sub-Assy, Exhaust Manifold, No.2
- Manufacturer Note: TYPE B:REFER TO ILLUSTRATION
- Replaced by: 25052-20170
- Warranty: This genuine part is guaranteed by Lexus's factory warranty.
Fits the following Vehicles:
- 2002-2003 Lexus ES300 | 6 Cyl 3.0L | 1MZFE; MCV30L-BEAGKA
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Lexus ES300 Exhaust Manifold Converter Sub-Assembly, No.2
Part Number: 25052-20080
$429.76 MSRP: $498.30
You Save: $68.54 (14%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Converter Sub-Assy, Exhaust Manifold, No.2
- Manufacturer Note: MARK 20080
- Replaced by: 25052-20090
- Warranty: This genuine part is guaranteed by Lexus's factory warranty.
Fits the following Vehicles:
- 1999-2001 Lexus ES300 | 6 Cyl 3.0L | 1MZFE; MCV20L-BTPGKA, MCV20L-BTPGKK
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Lexus ES300 Front Exhaust Pipe Assembly
Part Number: 17410-20460
$1561.97 MSRP: $1983.05
You Save: $421.08 (22%)
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Product Specifications
- Other Name: Pipe Assy, Exhaust, Front
- Position: Front
- Replaced by: 17410-20461
- Warranty: This genuine part is guaranteed by Lexus's factory warranty.
Fits the following Vehicles:
- 2003 Lexus ES300 | 6 Cyl 3.3L | 3MZFE; MCV31L-BEAGKA
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Lexus ES300 Front Exhaust Pipe Assembly
Part Number: 17410-20420
$1189.82 MSRP: $1510.57
You Save: $320.75 (22%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Pipe Assy, Exhaust, Front
- Position: Front
- Replaced by: 17410-0A420
- Warranty: This genuine part is guaranteed by Lexus's factory warranty.
Fits the following Vehicles:
- 2002-2003 Lexus ES300 | 6 Cyl 3.0L | 1MZFE; MCV30L-BEAGKA
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Lexus ES300 Front Exhaust Pipe Assembly
Part Number: 17410-20020
Product Specifications
- Other Name: Pipe Assy, Exhaust, Front; Crossover Pipe, Front Pipe
- Position: Front
- Warranty: This genuine part is guaranteed by Lexus's factory warranty.
Fits the following Vehicles:
- 1993-1995 Lexus ES300 | 6 Cyl 3.0L | 1MZFE; MCV10L-BTPGKA, MCV10L-BTPGKK
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Lexus ES300 Catalytic Converter Assembly
Part Number: 18450-62080
Product Specifications
- Other Name: Converter Assy, W/Catalyst; Catalytic Converter, Converter
- Warranty: This genuine part is guaranteed by Lexus's factory warranty.
Fits the following Vehicles:
- 1992-1995 Lexus ES300 | 6 Cyl 3.0L | 1MZFE, 3VZFE; MCV10L-BTPGKA, MCV10L-BTPGKK, VCV10L-BTMGKA, VCV10L-BTMGKK, VCV10L-BTPGKA, VCV10L-BTPGKK
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Lexus ES300 Front Exhaust Pipe Assembly
Part Number: 17410-62061
Product Specifications
- Other Name: Pipe Assy, Exhaust, Front; Crossover Pipe, Front Pipe
- Position: Front
- Replaces: 17410-62060
- Warranty: This genuine part is guaranteed by Lexus's factory warranty.
Fits the following Vehicles:
- 1992-1994 Lexus ES300 | 6 Cyl 3.0L | 3VZFE; VCV10L-BTMGKA, VCV10L-BTMGKK, VCV10L-BTPGKA, VCV10L-BTPGKK
View related parts
Lexus ES300 Front Exhaust Pipe Assembly
Part Number: 17410-62060
Product Specifications
- Other Name: Pipe Assy, Exhaust, Front
- Position: Front
- Replaced by: 17410-62061
- Warranty: This genuine part is guaranteed by Lexus's factory warranty.
Fits the following Vehicles:
- 1992 Lexus ES300 | 6 Cyl 3.0L | 3VZFE; VCV10L-BTMGKA, VCV10L-BTMGKK, VCV10L-BTPGKA, VCV10L-BTPGKK
View related parts
Lexus ES300 Front Exhaust Pipe Assembly
Part Number: 17410-20170
Product Specifications
- Other Name: Pipe Assy, Exhaust, Front; Converter & Pipe, Front Pipe
- Position: Front
- Warranty: This genuine part is guaranteed by Lexus's factory warranty.
Fits the following Vehicles:
- 1998-2000 Lexus ES300 | 6 Cyl 3.0L | 1MZFE; MCV20L-BTPGKA, MCV20L-BTPGKK
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Lexus ES300 Front Exhaust Pipe Assembly
Part Number: 17410-20310
Product Specifications
- Other Name: Pipe Assy, Exhaust, Front; Converter & Pipe, Front Pipe
- Position: Front
- Warranty: This genuine part is guaranteed by Lexus's factory warranty.
Fits the following Vehicles:
- 1999-2001 Lexus ES300 | 6 Cyl 3.0L | 1MZFE; MCV20L-BTPGKA, MCV20L-BTPGKK
View related parts
Lexus ES300 Front Exhaust Pipe Assembly
Part Number: 17410-20150
Product Specifications
- Other Name: Pipe Assy, Exhaust, Front
- Manufacturer Note: CALIFORNIA SPEC
- Position: Front
- Replaced by: 17410-20160
- Warranty: This genuine part is guaranteed by Lexus's factory warranty.
Fits the following Vehicles:
- 1997-1999 Lexus ES300 | 6 Cyl 3.0L | 1MZFE; MCV20L-BTPGKA
View related parts
Lexus ES300 Front Exhaust Pipe Assembly
Part Number: 17410-20050
Product Specifications
- Other Name: Pipe Assy, Exhaust, Front; Converter & Pipe, Front Pipe
- Position: Front
- Warranty: This genuine part is guaranteed by Lexus's factory warranty.
Fits the following Vehicles:
- 1997-1999 Lexus ES300 | 6 Cyl 3.0L | 1MZFE; MCV20L-BTPGKA, MCV20L-BTPGKK
View related parts
Lexus ES300 Front Exhaust Pipe Assembly
Part Number: 17410-20040
Product Specifications
- Other Name: Pipe Assy, Exhaust, Front; Front Pipe
- Manufacturer Note: CALIFORNIA SPEC
- Position: Front
- Warranty: This genuine part is guaranteed by Lexus's factory warranty.
Fits the following Vehicles:
- 1995-1996 Lexus ES300 | 6 Cyl 3.0L | 1MZFE; MCV10L-BTPGKA
View related parts
Lexus ES300 Front Exhaust Pipe Assembly
Part Number: 17410-20030
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:
- 1994-1996 Lexus ES300 | 6 Cyl 3.0L | 1MZFE; MCV10L-BTPGKA, MCV10L-BTPGKK

Lexus ES300 Catalytic Converter

Should you need to purchase new auto parts for your vehicle, we strongly suggest you consider the genuine Lexus ES300 Catalytic Converter available on LexusPartsNow.com. Our OEM Lexus ES300 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 ES300 Catalytic Converter Parts Questions & Experts Answers

Exhaust Manifold Converter Sub-Assembly, No.2
25052-20020
Q: What is a catalytic converter and how is it checked and replaced on Lexus ES300?
A: The catalytic converter is an emission control device in the exhaust system that reduces pollutants. There are two types: oxidation catalyst, which reduces HC and CO levels, and three-way catalyst, which also decreases NOx. Checking the converter requires expensive equipment. During underbody servicing, inspect for leaks, corrosion, and damage. If any damage is found, replace the converter. To diagnose a restricted converter, use a vacuum gauge to assess the impact of a blocked exhaust on the intake vacuum. Connect the gauge to a vacuum source, warm the engine, and note the vacuum reading at idle and after opening the throttle. If the reading is more than one in-Hg lower after the fourth test, there may be a restriction. When replacing the converter, spray the nuts on the exhaust flange studs before removing them, and then proceed to remove the nuts and separate the converter from the exhaust system. The installation process is the reverse of the removal procedure.

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