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

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 Toyota Highlander Catalytic Converter

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55 Catalytic Converters found

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Toyota Highlander Exhaust Manifold Converter Sub-Assembly, No.2
Part Number: 25052-20190
$536.51 MSRP: $671.64
You Save: $135.13 (21%)
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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:
- 2003-2007 Toyota Highlander | 6 Cyl 3.3L | 3MZFE; 3MZFE; MCU23L-BRANKA, MCU23L-BWANKA, MCU28L-BRANKA, MCU28L-BWANKA
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Toyota Highlander 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:
- 2003-2007 Toyota Highlander | 6 Cyl 3.3L | 3MZFE; 3MZFE; MCU23L-BRANKA, MCU23L-BWANKA, MCU28L-BRANKA, MCU28L-BWANKA
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Toyota Highlander 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:
- 2016-2019 Toyota Highlander | 6 Cyl 3.5L | 2GRFKS, 2GRFXS; 2GRFKS, 2GRFXS; GSU50L-ARZGHA, GSU50L-ARZMHA, GSU50L-ARZNHA, GSU55L-ARZGHA, GSU55L-ARZMHA, GSU55L-ARZNHA, GVU58L-ARXGHA, GVU58L-ARXMHA, GVU58L-ARXNHA
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Toyota Highlander Right Exhaust Manifold Sub-Assembly
Part Number: 17140-20120
$429.28 MSRP: $631.90
You Save: $202.62 (33%)
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Product Specifications
- Other Name: Manifold Sub-Assy, Exhaust, Rh; Exhaust Manifold
- Manufacturer Note: *114=TOYOTA/R20120/Y
- Position: Passenger Side
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 2006-2011 Toyota Highlander | Limited, STD | 6 Cyl 3.3L | 3MZFE; 3MZFE; MHU23L-BRXNKA, MHU23L-BWXNKA, MHU28L-BRXNKA, MHU28L-BWXNKA, MHU48L-BRXMKA, MHU48L-BRXNKA
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Toyota Highlander Right Exhaust Manifold Sub-Assembly
Part Number: 17140-0P210
$519.22 MSRP: $764.29
You Save: $245.07 (33%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Manifold Sub-Assembly, Exhaust, Rh; Exhaust Manifold
- Position: Passenger Side
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 2010-2013 Toyota Highlander | Limited, Medium, Sport, STD | 6 Cyl 3.5L | 2GRFE; 2GRFE; GSU40L-ARAGKA, GSU40L-ARAMKA, GSU40L-ARANKA, GSU40L-ARASKA, GSU45L-ARAGKA, GSU45L-ARAMKA, GSU45L-ARANKA, GSU45L-ARASKA
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Toyota Highlander Exhaust Manifold
Part Number: 17141-36050
$306.88 MSRP: $440.04
You Save: $133.16 (31%)
Ships in 1-3 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:
- 2008-2013 Toyota Highlander | STD | 4 Cyl 2.7L | 1ARFE; 1ARFE; ASU40L-ARTNKA, ASU40L-BRTNKA
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Toyota Highlander 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:
- 2020-2022 Toyota Highlander | 4 Cyl 2.5L | A25AFXS; A25AFXS; AXUH70L-ARXGHA, AXUH70L-ARXMHA, AXUH70L-ARXNHA, AXUH78L-ARXGHA, AXUH78L-ARXMHA, AXUH78L-ARXNHA
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Toyota Highlander Exhaust Manifold Converter Sub-Assembly
Part Number: 25051-28090
$821.27 MSRP: $1028.12
You Save: $206.85 (21%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Converter Sub-Assy, Exhaust Manifold; Exhaust Manifold
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 2001-2004 Toyota Highlander | 4 Cyl 2.4L | 2AZFE; 2AZFE; ACU20L-BRPNKA, ACU20L-BWPNKA, ACU25L-BRPNKA, ACU25L-BWPNKA
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Toyota Highlander Exhaust Manifold Converter Sub-Assembly
Part Number: 25051-28290
$681.49 MSRP: $853.13
You Save: $171.64 (21%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Converter Sub-Assy, Exhaust Manifold; Exhaust Manifold
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 2003-2007 Toyota Highlander | 4 Cyl 2.4L | 2AZFE; 2AZFE; ACU20L-BRPNKA, ACU20L-BWPNKA, ACU25L-BRPNKA, ACU25L-BWPNKA
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Toyota Highlander Exhaust Manifold Converter Sub-Assembly
Part Number: 25051-28410
$515.49 MSRP: $645.33
You Save: $129.84 (21%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Converter Sub-Assy, Exhaust Manifold; Exhaust Manifold
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 2006-2007 Toyota Highlander | 4 Cyl 2.4L | 2AZFE; 2AZFE; ACU20L-BRPNKA, ACU20L-BWPNKA, ACU25L-BRPNKA, ACU25L-BWPNKA
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Toyota Highlander 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
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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:
- 2010-2013 Toyota Highlander | Limited, Medium, Sport, STD | 6 Cyl 3.5L | 2GRFE; 2GRFE; GSU40L-ARAGKA, GSU40L-ARAMKA, GSU40L-ARANKA, GSU40L-ARASKA, GSU45L-ARAGKA, GSU45L-ARAMKA, GSU45L-ARANKA, GSU45L-ARASKA
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Toyota Highlander 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:
- 2008-2010 Toyota Highlander | Grande, Limited, Sport, STD | 6 Cyl 3.5L | 2GRFE; 2GRFE; GSU40L-BRAGKA, GSU40L-BRAMKA, GSU40L-BRANKA, GSU40L-BRASKA, GSU45L-BRAGKA, GSU45L-BRAMKA, GSU45L-BRANKA, GSU45L-BRASKA
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Toyota Highlander 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:
- 2014-2017 Toyota Highlander | 6 Cyl 3.5L | 2GRFE; 2GRFE; GSU50L-ARTGKA, GSU50L-ARTMKA, GSU50L-ARTNKA, GSU55L-ARTGKA, GSU55L-ARTMKA, GSU55L-ARTNKA
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Toyota Highlander 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:
- 2016-2019 Toyota Highlander | 6 Cyl 3.5L | 2GRFKS; 2GRFKS; GSU50L-ARZGHA, GSU50L-ARZMHA, GSU50L-ARZNHA, GSU55L-ARZGHA, GSU55L-ARZMHA, GSU55L-ARZNHA
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Toyota Highlander Exhaust Manifold Converter Sub-Assembly, No.2
Part Number: 25052-20220
$495.04 MSRP: $619.71
You Save: $124.67 (21%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Converter Sub-Assy, Exhaust Manifold, No.2; Exhaust Manifold
- Manufacturer Note: *114=TOYOTA/L20220/Y
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 2006-2007 Toyota Highlander | 6 Cyl 3.3L | 3MZFE; 3MZFE; MHU23L-BRXNKA, MHU23L-BWXNKA, MHU28L-BRXNKA, MHU28L-BWXNKA
View related parts
Toyota Highlander Front Exhaust Pipe Assembly
Part Number: 17410-0P320
$192.25 MSRP: $252.49
You Save: $60.24 (24%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Pipe Assembly, Exhaust, Front; Front Pipe
- Position: Front
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 2014-2017 Toyota Highlander | 6 Cyl 3.5L | 2GRFE; 2GRFE; GSU50L-ARTGKA, GSU50L-ARTMKA, GSU50L-ARTNKA, GSU55L-ARTGKA, GSU55L-ARTMKA, GSU55L-ARTNKA
View related parts
Toyota Highlander Right Exhaust Manifold Sub-Assembly
Part Number: 17140-0P080
$970.91 MSRP: $1429.17
You Save: $458.26 (33%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Manifold Sub-Assy, Exhaust, Rh; Exhaust Manifold
- Manufacturer Note: (L)
- Position: Passenger Side
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 2010-2011 Toyota Highlander | Limited, Medium, Sport, STD | 6 Cyl 3.5L | 2GRFE; 2GRFE; GSU40L-ARAGKA, GSU40L-ARAMKA, GSU40L-ARANKA, GSU40L-ARASKA, GSU45L-ARAGKA, GSU45L-ARAMKA, GSU45L-ARANKA, GSU45L-ARASKA
View related parts
Toyota Highlander Front Exhaust Pipe Assembly
Part Number: 17410-0V320
$876.30 MSRP: $1181.47
You Save: $305.17 (26%)
ADD TO CART
Product Specifications
- Other Name: Pipe Assembly, Exhaust, Front; Front Pipe
- Position: Front
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 2014-2017 Toyota Highlander | 4 Cyl 2.7L | 1ARFE; 1ARFE; ASU50L-ARTNKA
View related parts
Toyota Highlander Exhaust Pipe Assembly
Part Number: 17410-F0290
$966.59 MSRP: $1303.19
You Save: $336.60 (26%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Pipe Assembly, Exhaust; Front Pipe
- Position: Front
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 2020-2022 Toyota Highlander | 4 Cyl 2.5L | A25AFXS; A25AFXS; AXUH70L-ARXGHA, AXUH70L-ARXMHA, AXUH70L-ARXNHA, AXUH78L-ARXGHA, AXUH78L-ARXMHA, AXUH78L-ARXNHA
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Toyota Highlander Catalytic Converter Assembly
Part Number: 18450-20110
$508.78 MSRP: $636.93
You Save: $128.15 (21%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Converter Assy, W/Catalyst; Catalytic Converter
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 2001-2004 Toyota Highlander | 6 Cyl 3.0L | 1MZFE; 1MZFE; MCU20L-BWPNKA, MCU25L-BWPNKA

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1-20 of 55 Results

Toyota Highlander Catalytic Converter

Catalytic Converter of Toyota Highlander is an essential factor of emission system, it helps change various poisonous gases such as Carbon Monoxide, Hydrocarbons, and Oxides of Nitrogen and so on into harmless products such as water, Carbon Dioxide, and Nitrogen and so on. This device holds substances such as platinum, palladium and rhodium among others that are responsible to catalyse or speed up a chemical reaction but remain chemically unchanged in the process. Highlander models' catalytic converters are developed to minimize exhaust back-pressure and restriction so that engine performance will be optimized and oxidation/reduction efficiency also will be optimized. They are available in different categories; those that are designed to directly fit the car and those that are general converters which have to be fitted by cutting the end of the car's pipe and fixing it in place using clamps. Catalytic Converters act as the equipment that has the responsibility of lowering emission and meeting maximum emission standards important for the protection of the environment as well as the improvement of performance of vehicles.

If you are in demand for superior quality and affordable OEM Toyota Highlander Catalytic Converter, then shop with us! We own a wide range of the reduced-priced genuine Toyota Highlander Catalytic Converter. You can purchase in confidence as all parts come with a manufacturer's warranty. Any issues with our products? No need to worry as we have a hassle-free return policy to guide you every step of the way.

Toyota Highlander Catalytic Converter Parts Questions & Experts Answers

Left Exhaust Manifold Sub-Assembly
17105-20010
Q: What should I know about catalytic converters and their operation, maintenance, and potential issues on Toyota Highlander?
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.