What is the general description and maintenance procedure for a catalytic converter on Toyota Sienna?

Because of a Federally mandated extended warranty covering emissions-related components like the catalytic converter, it is advisable to consult a dealer service department before replacing the converter at your own expense. The catalytic converter is an emission control device added to the exhaust system to reduce pollutants from the exhaust gas stream, with two types available: the conventional oxidation catalyst, which reduces hydrocarbon and carbon monoxide levels, and the three-way catalyst, which lowers oxides of nitrogen, hydrocarbons, and carbon monoxide. Models from 2001 to 2006 feature three catalytic converters, including a warm-up three-way catalytic converter as part of the front exhaust manifold and another in the pipe from the rear manifold, with the main exhaust pipe containing the final converter. The test equipment for diagnosing a malfunctioning converter is expensive and sophisticated, so it is recommended to take the vehicle to a dealer or authorized emissions inspection facility for diagnosis and repair. When servicing underbody components, check the converter for leaks, corrosion, dents, and other damage, and inspect the welds and flange bolts attaching the converter to the exhaust system; if any damage is found, replacement is necessary. Although catalytic converters rarely break, they can become plugged, and a vacuum gauge can be used to check for a restricted converter by connecting it to an intake manifold vacuum source, warming the engine, and recording vacuum readings at idle and after quickly opening the throttle. If the reading after the fourth test is more than one in-Hg lower than the idle reading, the exhaust system may be restricted. For models from 2001 and later, warm-up converters cannot be replaced separately, so it is important to spray the nuts on the exhaust flange studs with penetrating oil before removal, disconnect the flange at the rear of the converter, and cut the front of the converter from the pipe for removal, with installation being the reverse of removal.

Genuine Toyota Sienna Catalytic Converter

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45 Catalytic Converters found

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Toyota Sienna Exhaust Manifold Converter Sub-Assembly, No.2
Part Number: 25052-20190
$536.51 MSRP: $671.64
You Save: $135.13 (21%)
Ships in 1-3 Business Days
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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 Toyota's factory warranty.
Fits the following Vehicles:
- 2004-2007 Toyota Sienna | CE, LE, XLE | 6 Cyl 3.3L | 3MZFE; 3MZFE; MCL20L-PFADKK, MCL20L-PFAEKA, MCL20L-PFAEKK, MCL20L-PFAQKA, MCL20L-PFAQKK, MCL20L-PRADKK, MCL20L-PRAEKA, MCL20L-PRAEKK, MCL20L-PRAQKA, MCL20L-PRAQKK, MCL23L-SBADKA, MCL23L-SBADKK, MCL25L-PFADKK, MCL25L-PFAEKA, MCL25L-PFAEKK, MCL25L-PFAQKA, MCL25L-PFAQKK
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Toyota Sienna Exhaust Manifold Converter Sub-Assembly
Part Number: 25051-20040
$563.97 MSRP: $706.01
You Save: $142.04 (21%)
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 Toyota's factory warranty.
Fits the following Vehicles:
- 2004-2007 Toyota Sienna | CE, LE, XLE | 6 Cyl 3.3L | 3MZFE; 3MZFE; MCL25L-PFADKK, MCL25L-PFAEKA, MCL25L-PFAEKK, MCL25L-PFAQKA, MCL25L-PFAQKK
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Toyota Sienna Right Exhaust Manifold Sub-Assembly
Part Number: 17140-20030
$437.86 MSRP: $644.53
You Save: $206.67 (33%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Manifold Sub-Assy, Exhaust, Rh; Exhaust Manifold
- Position: Passenger Side
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 2004-2007 Toyota Sienna | CE, LE, XLE | 6 Cyl 3.3L | 3MZFE; 3MZFE; MCL20L-PFADKK, MCL20L-PFAEKA, MCL20L-PFAEKK, MCL20L-PFAQKA, MCL20L-PFAQKK, MCL20L-PRADKK, MCL20L-PRAEKA, MCL20L-PRAEKK, MCL20L-PRAQKA, MCL20L-PRAQKK, MCL23L-SBADKA, MCL23L-SBADKK
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Toyota Sienna Right Exhaust Manifold Sub-Assembly
Part Number: 17140-0P270
$412.55 MSRP: $607.28
You Save: $194.73 (33%)
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Product Specifications
- Other Name: Manifold Sub-Assembly, Exhaust, Rh; Catalytic Converter, Exhaust Manifold
- Position: Passenger Side
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 2011-2017 Toyota Sienna | LE, SE, STD, XLE | 6 Cyl 3.5L | 2GRFE; 2GRFE; GSL30L-PFTDKA, GSL30L-PFTEKA, GSL30L-PFTQKA, GSL30L-PRTEKA, GSL30L-PRTQKA, GSL30L-PRTSKA, GSL33L-SBTDKA
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Toyota Sienna Left Exhaust Manifold Sub-Assembly
Part Number: 17150-0P330
$722.74 MSRP: $1063.86
You Save: $341.12 (33%)
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Product Specifications
- Other Name: Manifold Sub-Assembly, Exhaust, Lh
- Position: Driver Side
- Replaced by: 17150-0P331
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 2016-2020 Toyota Sienna | LE, SE, STD, XLE | 6 Cyl 3.5L | 2GRFKS; 2GRFKS; GSL30L-PFZDHA, GSL30L-PFZEHA, GSL30L-PFZQHA, GSL30L-PRZEHA, GSL30L-PRZQHA, GSL30L-PRZSHA, GSL33L-SBZDHA, GSL33L-SEZDHA, GSL35L-PFZEHA, GSL35L-PFZQHA, GSL35L-PFZSHA
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Toyota Sienna Exhaust Manifold Converter Sub-Assembly, No.2
Part Number: 25052-20110
$297.76 MSRP: $363.11
You Save: $65.35 (18%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Converter Sub-Assy, Exhaust Manifold, No.2; Exhaust Manifold
- Manufacturer Note: MARK 20110
- Replaces: 25052-20100
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 2000-2003 Toyota Sienna | CE, LE | 6 Cyl 3.0L | 1MZFE; 1MZFE; MCL10L-GFSDKA, MCL10L-GFSDKK, MCL10L-GFSGKA, MCL10L-GFSGKK, MCL10L-PFSDKA, MCL10L-PFSDKK, MCL10L-PFSGKA, MCL10L-PFSGKK, MCL10L-SESDKA, MCL10L-SESDKK
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Toyota Sienna Exhaust Manifold Converter Sub-Assembly, No.2
Part Number: 25052-20020
$294.51 MSRP: $359.15
You Save: $64.64 (18%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Converter Sub-Assy, Exhaust Manifold, No.2; Exhaust Manifold
- Manufacturer Note: CALIFORNIA SPEC
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 1998-2001 Toyota Sienna | CE, LE | 6 Cyl 3.0L | 1MZFE; 1MZFE; MCL10L-GFSDKA, MCL10L-GFSGKA, MCL10L-PFSDKA, MCL10L-PFSGKA, MCL10L-SESDKA
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Toyota Sienna Exhaust Manifold
Part Number: 17141-F0010
$573.20 MSRP: $843.75
You Save: $270.55 (33%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Manifold, Exhaust
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 2021-2022 Toyota Sienna | 4 Cyl 2.5L | A25AFXS; A25AFXS; AXLH40L-PNXLHA, AXLH40L-PNXSHA, AXLH40L-PNXXHA, AXLH40L-PPXEHA, AXLH40L-PPXXHA, AXLH45L-PNXLHA, AXLH45L-PNXSHA, AXLH45L-PNXXHA, AXLH45L-PPXEHA
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Toyota Sienna Front Exhaust Pipe Assembly
Part Number: 17410-0A400
$270.18 MSRP: $354.83
You Save: $84.65 (24%)
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 Toyota's factory warranty.
Fits the following Vehicles:
- 2004-2007 Toyota Sienna | CE, LE, XLE | 6 Cyl 3.3L | 3MZFE; 3MZFE; MCL25L-PFADKK, MCL25L-PFAEKA, MCL25L-PFAEKK, MCL25L-PFAQKA, MCL25L-PFAQKK
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Toyota Sienna Pipe Assembly, Exhaust
Part Number: 17410-F0121
$789.52 MSRP: $1064.45
You Save: $274.93 (26%)
Ships in 1-3 Business Days
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Product Specifications
- Position: Front
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 2021-2022 Toyota Sienna | 4 Cyl 2.5L | A25AFXS; A25AFXS; AXLH40L-PNXLHA, AXLH40L-PNXXHA, AXLH40L-PPXEHA, AXLH40L-PPXXHA
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Toyota Sienna Left Exhaust Manifold Sub-Assembly
Part Number: 17150-0P150
$944.67 MSRP: $1390.54
You Save: $445.87 (33%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Manifold Sub-Assembly, Exhaust, Lh; Catalytic Converter, Exhaust Manifold
- Position: Driver Side
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 2011-2012 Toyota Sienna | LE, SE, STD, XLE | 6 Cyl 3.5L | 2GRFE; 2GRFE; GSL30L-PFTDKA, GSL30L-PFTEKA, GSL30L-PFTQKA, GSL30L-PRTEKA, GSL30L-PRTQKA, GSL30L-PRTSKA, GSL33L-SBTDKA, GSL35L-PFTDKA, GSL35L-PFTEKA, GSL35L-PFTQKA
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Toyota Sienna Pipe Assembly, Exhaust
Part Number: 17410-F0331
$843.42 MSRP: $1137.14
You Save: $293.72 (26%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Front Pipe
- Position: Front
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 2021-2022 Toyota Sienna | 4 Cyl 2.5L | A25AFXS; A25AFXS; AXLH40L-PNXLHA, AXLH40L-PNXSHA, AXLH40L-PNXXHA, AXLH40L-PPXEHA, AXLH40L-PPXXHA, AXLH45L-PNXLHA, AXLH45L-PNXSHA, AXLH45L-PNXXHA, AXLH45L-PPXEHA
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Toyota Sienna Front Exhaust Pipe Assembly
Part Number: 17410-0A390
$325.99 MSRP: $428.15
You Save: $102.16 (24%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Pipe Assy, Exhaust, Front; Front Pipe
- Position: Front
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 2004-2007 Toyota Sienna | CE, LE, XLE | 6 Cyl 3.3L | 3MZFE; 3MZFE; MCL20L-PFADKK, MCL20L-PFAEKA, MCL20L-PFAEKK, MCL20L-PFAQKA, MCL20L-PFAQKK, MCL20L-PRADKK, MCL20L-PRAEKA, MCL20L-PRAEKK, MCL20L-PRAQKA, MCL20L-PRAQKK, MCL23L-SBADKA, MCL23L-SBADKK
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Toyota Sienna Left Exhaust Manifold Sub-Assembly
Part Number: 17150-31270
$889.07 MSRP: $1308.71
You Save: $419.64 (33%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Manifold Sub-Assy, Exhaust, Lh; Exhaust Manifold
- Position: Driver Side
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 2007-2010 Toyota Sienna | CE, LE, XLE | 6 Cyl 3.5L | 2GRFE; 2GRFE; GSL20L-PFADKK, GSL20L-PFAEKA, GSL20L-PFAEKK, GSL20L-PFAQKA, GSL20L-PFAQKK, GSL20L-PRADKK, GSL20L-PRAEKA, GSL20L-PRAEKK, GSL20L-PRAQKA, GSL20L-PRAQKK, GSL23L-SBADKA, GSL23L-SBADKK, GSL25L-PFADKK, GSL25L-PFAEKA, GSL25L-PFAEKK, GSL25L-PFAQKA, GSL25L-PFAQKK
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Toyota Sienna Left Exhaust Manifold Sub-Assembly
Part Number: 17150-0P090
$796.53 MSRP: $1172.49
You Save: $375.96 (33%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Manifold Sub-Assy, Exhaust, Lh; Exhaust Manifold
- Manufacturer Note: MARK L0P090
- Position: Driver Side
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 2006-2010 Toyota Sienna | CE, LE, XLE | 6 Cyl 3.5L | 2GRFE; 2GRFE; GSL20L-PFADKK, GSL20L-PFAEKA, GSL20L-PFAEKK, GSL20L-PFAQKA, GSL20L-PFAQKK, GSL20L-PRADKK, GSL20L-PRAEKA, GSL20L-PRAEKK, GSL20L-PRAQKA, GSL20L-PRAQKK, GSL23L-SBADKA, GSL23L-SBADKK, GSL25L-PFADKK, GSL25L-PFAEKA, GSL25L-PFAEKK, GSL25L-PFAQKA, GSL25L-PFAQKK
View related parts
Toyota Sienna Left Exhaust Manifold Sub-Assembly
Part Number: 17150-0P250
$794.49 MSRP: $1169.49
You Save: $375.00 (33%)
ADD TO CART
Product Specifications
- Other Name: Manifold Sub-Assembly, Exhaust, Lh; Catalytic Converter, Exhaust Manifold
- Position: Driver Side
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 2011-2017 Toyota Sienna | LE, SE, STD, XLE | 6 Cyl 3.5L | 2GRFE; 2GRFE; GSL30L-PFTDKA, GSL30L-PFTEKA, GSL30L-PFTQKA, GSL30L-PRTEKA, GSL30L-PRTQKA, GSL30L-PRTSKA, GSL33L-SBTDKA, GSL35L-PFTDKA, GSL35L-PFTEKA, GSL35L-PFTQKA
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Toyota Sienna Right Exhaust Manifold Sub-Assembly
Part Number: 17140-0P150
$942.63 MSRP: $1387.55
You Save: $444.92 (33%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Manifold Sub-Assembly, Exhaust, Rh; Catalytic Converter, Exhaust Manifold
- Position: Passenger Side
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 2011-2012 Toyota Sienna | LE, STD, XLE | 6 Cyl 3.5L | 2GRFE; 2GRFE; GSL35L-PFTDKA, GSL35L-PFTEKA, GSL35L-PFTQKA
View related parts
Toyota Sienna Right Exhaust Manifold Sub-Assembly
Part Number: 17140-0P330
$722.74 MSRP: $1063.86
You Save: $341.12 (33%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Manifold Sub-Assembly, Exhaust, Rh
- Manufacturer Note: *114=TOYOTA/R0P330/Y
- Position: Passenger Side
- Replaced by: 17140-0P331
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 2016-2020 Toyota Sienna | LE, SE, STD, XLE | 6 Cyl 3.5L | 2GRFKS; 2GRFKS; GSL30L-PFZDHA, GSL30L-PFZEHA, GSL30L-PFZQHA, GSL30L-PRZEHA, GSL30L-PRZQHA, GSL30L-PRZSHA, GSL33L-SBZDHA, GSL33L-SEZDHA, GSL35L-PFZEHA, GSL35L-PFZQHA, GSL35L-PFZSHA
View related parts
Toyota Sienna Front Exhaust Pipe Assembly
Part Number: 17410-0A310
Product Specifications
- Other Name: Pipe Assy, Exhaust, Front; Converter & Pipe, Front Pipe
- Position: Front
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 2000-2003 Toyota Sienna | CE, LE | 6 Cyl 3.0L | 1MZFE; 1MZFE; MCL10L-GFSDKA, MCL10L-GFSDKK, MCL10L-GFSGKA, MCL10L-GFSGKK, MCL10L-PFSDKA, MCL10L-PFSDKK, MCL10L-PFSGKA, MCL10L-PFSGKK, MCL10L-SESDKA, MCL10L-SESDKK
View related parts
Toyota Sienna Front Exhaust Pipe Assembly
Part Number: 17410-0A203
Product Specifications
- Other Name: Pipe Assy, Exhaust, Front; Converter & Pipe, Front Pipe
- Manufacturer Note: CALIFORNIA SPEC
- Position: Front
- Replaces: 17410-0A202
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 1998-2001 Toyota Sienna | CE, LE | 6 Cyl 3.0L | 1MZFE; 1MZFE; MCL10L-GFSDKA, MCL10L-GFSGKA, MCL10L-PFSDKA, MCL10L-PFSGKA, MCL10L-SESDKA

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Toyota Sienna Catalytic Converter

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Toyota Sienna Catalytic Converter Parts Questions & Experts Answers

Exhaust Manifold Converter Sub-Assembly, No.2
25052-20110
Q: What is the general description and maintenance procedure for a catalytic converter on Toyota Sienna?
A: Because of a Federally mandated extended warranty covering emissions-related components like the catalytic converter, it is advisable to consult a dealer service department before replacing the converter at your own expense. The catalytic converter is an emission control device added to the exhaust system to reduce pollutants from the exhaust gas stream, with two types available: the conventional oxidation catalyst, which reduces hydrocarbon and carbon monoxide levels, and the three-way catalyst, which lowers oxides of nitrogen, hydrocarbons, and carbon monoxide. Models from 2001 to 2006 feature three catalytic converters, including a warm-up three-way catalytic converter as part of the front exhaust manifold and another in the pipe from the rear manifold, with the main exhaust pipe containing the final converter. The test equipment for diagnosing a malfunctioning converter is expensive and sophisticated, so it is recommended to take the vehicle to a dealer or authorized emissions inspection facility for diagnosis and repair. When servicing underbody components, check the converter for leaks, corrosion, dents, and other damage, and inspect the welds and flange bolts attaching the converter to the exhaust system; if any damage is found, replacement is necessary. Although catalytic converters rarely break, they can become plugged, and a vacuum gauge can be used to check for a restricted converter by connecting it to an intake manifold vacuum source, warming the engine, and recording vacuum readings at idle and after quickly opening the throttle. If the reading after the fourth test is more than one in-Hg lower than the idle reading, the exhaust system may be restricted. For models from 2001 and later, warm-up converters cannot be replaced separately, so it is important to spray the nuts on the exhaust flange studs with penetrating oil before removal, disconnect the flange at the rear of the converter, and cut the front of the converter from the pipe for removal, with installation being the reverse of removal.