What is the purpose and procedure for replacing a catalytic converter on Infiniti G35?

A catalytic converter serves as an emission control device within the exhaust system, reducing specific pollutants in the exhaust gas stream. Two types of converters exist: an oxidation catalyst for reducing hydrocarbons (HC) and carbon monoxide (CO), and a reduction catalyst for reducing oxides of nitrogen (NOx). A "Three-Way Catalyst" (TWC) can reduce all three pollutants. Before catalytic converter removal, the oxygen sensors should be removed. The upper end of each catalyst includes an inlet pipe with a mounting flange attaching to the exhaust manifold flange, while the lower end has an outlet pipe with a flange connecting to the Y-pipe and the rest of the exhaust system. To diagnose potential catalytic converter issues, costly test equipment, such as a loaded-mode dynamometer and a 5-gas analyzer, is required, so it's advisable to seek diagnosis and repairs at a dealer or authorized emission inspection facility. When performing underbody component service with the vehicle raised, inspect the converter for leaks, corrosion, dents, or damage, paying close attention to welds, flange bolts, and nuts connecting the front and rear ends; replace the converter if any damage is evident. Though catalytic converters seldom fail, they can become restricted or blocked. To check for a restricted converter, use a vacuum gauge to assess the impact of a blocked exhaust on intake vacuum, following a specific procedure involving recording vacuum readings at idle and under throttle conditions. If the fourth reading is significantly lower than the idle reading, it suggests exhaust system restriction, potentially due to a plugged catalytic converter or other obstructions like an exhaust pipe or muffler. To replace the catalytic converter, lift the vehicle securely on jackstands, apply penetrating oil to catalyst-to-exhaust manifold studs, clamp bolt nuts, and bracket fasteners, allowing time for penetration. Simultaneously, disconnect the downstream oxygen sensor and remove it. Next, remove the upper and lower catalyst mounting nuts, take out the catalytic converter, and discard old flange gaskets. For installation, follow the reverse procedure, using new flange gaskets and replacing any damaged fasteners while ensuring tight nut fastening.

Genuine Infiniti G35 Catalytic Converter

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20 Catalytic Converters found

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Infiniti G35 Three Way Catalytic Converter
Part Number: 208B2-CG725
$774.42 MSRP: $1055.10
You Save: $280.68 (27%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Catalytic Converter
- Position: Passenger Side
- Warranty: This genuine part is guaranteed by Infiniti's factory warranty.
Fits the following Vehicles:
- 2003-2007 Infiniti G35 | Track | 6 Cyl 3.5L | VQ35DE
View related parts
Infiniti G35 Three Way Catalytic Converter
Part Number: B08B2-1NA0A
$1176.57 MSRP: $1602.43
You Save: $425.86 (27%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Replaced by: B08B2-1NA0B
- Warranty: This genuine part is guaranteed by Infiniti's factory warranty.
Fits the following Vehicles:
- 2007-2008 Infiniti G35 | Journey, Leather, Premium, Sport, Sport Premium | 6 Cyl 3.5L | VQ35HR
View related parts
Infiniti G35 Three Way Catalytic Converter
Part Number: 208B3-CG725
$762.98 MSRP: $1039.42
You Save: $276.44 (27%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Catalytic Converter
- Position: Driver Side
- Warranty: This genuine part is guaranteed by Infiniti's factory warranty.
Fits the following Vehicles:
- 2003-2007 Infiniti G35 | Track | 6 Cyl 3.5L | VQ35DE
View related parts
Infiniti G35 Front Exhaust Tube Assembly
Part Number: 20020-AM660
$735.28 MSRP: $1008.62
You Save: $273.34 (28%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Tube Assembly-Exhaust,Front; Front Pipe
- Position: Front
- Replaced by: B0M20-AM660
- Warranty: This genuine part is guaranteed by Infiniti's factory warranty.
Fits the following Vehicles:
- 2003-2005 Infiniti G35 | Basic, Sport, Track | 6 Cyl 3.5L | VQ35DE
View related parts
Infiniti G35 Three Way Catalytic Converter
Part Number: 208B2-AC325
$874.76 MSRP: $1192.75
You Save: $317.99 (27%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Catalytic Converter
- Position: Passenger Side
- Warranty: This genuine part is guaranteed by Infiniti's factory warranty.
Fits the following Vehicles:
- 2003-2007 Infiniti G35 | Basic, Sport, Track | 6 Cyl 3.5L | VQ35DE
View related parts
Infiniti G35 Three Way Catalytic Converter
Part Number: B08B2-JK20A
$1253.26 MSRP: $1498.20
You Save: $244.94 (17%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Position: Passenger Side
- Replaced by: B08B2-JK20B
- Warranty: This genuine part is guaranteed by Infiniti's factory warranty.
Fits the following Vehicles:
- 2007-2008 Infiniti G35 | Leather, Sport | 6 Cyl 3.5L | VQ35HR
View related parts
Infiniti G35 Three Way Catalytic Converter
Part Number: 208B3-AC325
$874.76 MSRP: $1192.75
You Save: $317.99 (27%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Catalytic Converter
- Position: Driver Side
- Warranty: This genuine part is guaranteed by Infiniti's factory warranty.
Fits the following Vehicles:
- 2003-2007 Infiniti G35 | Basic, Sport, Track | 6 Cyl 3.5L | VQ35DE
View related parts
Infiniti G35 Three Way Catalytic Converter
Part Number: B08B2-CF90A
$1034.63 MSRP: $1412.05
You Save: $377.42 (27%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Catalytic Converter
- Position: Passenger Side
- Warranty: This genuine part is guaranteed by Infiniti's factory warranty.
Fits the following Vehicles:
- 2006-2007 Infiniti G35 | Sport, Track | 6 Cyl 3.5L | VQ35DE
View related parts
Infiniti G35 Three Way Catalytic Converter
Part Number: B08B3-CF90A
$1034.63 MSRP: $1412.05
You Save: $377.42 (27%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Catalytic Converter
- Position: Driver Side
- Warranty: This genuine part is guaranteed by Infiniti's factory warranty.
Fits the following Vehicles:
- 2006-2007 Infiniti G35 | Sport, Track | 6 Cyl 3.5L | VQ35DE
View related parts
Infiniti G35 Three Way Catalytic Converter
Part Number: B08B3-1NA0A
$785.71 MSRP: $1070.58
You Save: $284.87 (27%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Replaced by: B08B3-1NA0B
- Warranty: This genuine part is guaranteed by Infiniti's factory warranty.
Fits the following Vehicles:
- 2007-2008 Infiniti G35 | Journey, Leather, Premium, Sport, Sport Premium | 6 Cyl 3.5L | VQ35HR
View related parts
Infiniti G35 Three Way Catalytic Converter
Part Number: B08B3-1NC0A
$833.65 MSRP: $1136.35
You Save: $302.70 (27%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Replaced by: B08B3-1NC0B
- Warranty: This genuine part is guaranteed by Infiniti's factory warranty.
Fits the following Vehicles:
- 2008 Infiniti G35 | Journey, Leather, Premium, Sport, Sport Premium | 6 Cyl 3.7L | VQ37VHR
View related parts
Infiniti G35 Three Way Catalytic Converter
Part Number: B08B2-1NC0A
$876.19 MSRP: $1190.38
You Save: $314.19 (27%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Replaced by: B08B2-1NC0B
- Warranty: This genuine part is guaranteed by Infiniti's factory warranty.
Fits the following Vehicles:
- 2008 Infiniti G35 | Journey, Leather, Premium, Sport, Sport Premium | 6 Cyl 3.7L | VQ37VHR
View related parts
Infiniti G35 Three Way Catalytic Converter
Part Number: 208B3-CD425
$833.65 MSRP: $1136.35
You Save: $302.70 (27%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Catalytic Converter
- Position: Driver Side
- Warranty: This genuine part is guaranteed by Infiniti's factory warranty.
Fits the following Vehicles:
- 2003-2005 Infiniti G35 | Basic, Sport, Track | 6 Cyl 3.5L | VQ35DE
View related parts
Infiniti G35 Three Way Catalytic Converter
Part Number: 208B2-AM625
$1034.65 MSRP: $1412.07
You Save: $377.42 (27%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Catalytic Converter
- Position: Passenger Side
- Warranty: This genuine part is guaranteed by Infiniti's factory warranty.
Fits the following Vehicles:
- 2003-2005 Infiniti G35 | Basic, Track | 6 Cyl 3.5L | VQ35DE
View related parts
Infiniti G35 Front Exhaust Tube Assembly
Part Number: 20020-JK000
Product Specifications
- Other Name: Tube Assembly-Exhaust,Front; Front Pipe
- Position: Front
- Warranty: This genuine part is guaranteed by Infiniti's factory warranty.
Fits the following Vehicles:
- 2007-2008 Infiniti G35 | Journey, Leather, Premium, Sport, Sport Premium | 6 Cyl 3.5L, 6 Cyl 3.7L | VQ35HR, VQ37VHR
View related parts
Infiniti G35 Front Exhaust Tube Assembly
Part Number: 20020-CG00A
Product Specifications
- Other Name: Tube Assembly-Exhaust,Front; Front Pipe
- Position: Front
- Warranty: This genuine part is guaranteed by Infiniti's factory warranty.
Fits the following Vehicles:
- 2005-2007 Infiniti G35 | Track | 6 Cyl 3.5L | VQ35DE
View related parts
Infiniti G35 Front Exhaust Tube Assembly
Part Number: 20020-CG000
Product Specifications
- Other Name: Tube Assembly-Exhaust,Front; Front Pipe
- Position: Front
- Warranty: This genuine part is guaranteed by Infiniti's factory warranty.
Fits the following Vehicles:
- 2003-2006 Infiniti G35 | Track | 6 Cyl 3.5L | VQ35DE
View related parts
Infiniti G35 Three Way Catalytic Converter
Part Number: 208B2-CD425
Product Specifications
- Other Name: Catalytic Converter
- Position: Passenger Side
- Warranty: This genuine part is guaranteed by Infiniti's factory warranty.
Fits the following Vehicles:
- 2003-2005 Infiniti G35 | Basic, Sport, Track | 6 Cyl 3.5L | VQ35DE
View related parts
Infiniti G35 Three Way Catalytic Converter
Part Number: 208B3-AM625
Product Specifications
- Other Name: Catalytic Converter
- Position: Driver Side
- Warranty: This genuine part is guaranteed by Infiniti's factory warranty.
Fits the following Vehicles:
- 2003-2005 Infiniti G35 | Basic, Track | 6 Cyl 3.5L | VQ35DE
View related parts
Infiniti G35 Three Way Catalytic Converter
Part Number: B08B3-JK20A
Product Specifications
- Position: Driver Side
- Replaced by: B08B3-JK20B
- Warranty: This genuine part is guaranteed by Infiniti's factory warranty.
Fits the following Vehicles:
- 2007-2008 Infiniti G35 | Leather, Sport | 6 Cyl 3.5L | VQ35HR

Infiniti G35 Catalytic Converter

Wondering where to find exceptional quality and economically-priced OEM Infiniti G35 Catalytic Converter? You are at the proper online store. We offer all genuine Infiniti G35 Catalytic Converter with a manufacturer's warranty at unbeatable prices. Order now and you can get brand-new parts at your door step with our fast shipping times.

Infiniti G35 Catalytic Converter Parts Questions & Experts Answers

Three Way Catalytic Converter
208B2-CG725
Q: What is the purpose and procedure for replacing a catalytic converter on Infiniti G35?
A: A catalytic converter serves as an emission control device within the exhaust system, reducing specific pollutants in the exhaust gas stream. Two types of converters exist: an oxidation catalyst for reducing hydrocarbons (HC) and carbon monoxide (CO), and a reduction catalyst for reducing oxides of nitrogen (NOx). A "Three-Way Catalyst" (TWC) can reduce all three pollutants. Before catalytic converter removal, the Oxygen Sensors should be removed. The upper end of each catalyst includes an inlet pipe with a mounting flange attaching to the exhaust manifold flange, while the lower end has an outlet pipe with a flange connecting to the Y-pipe and the rest of the exhaust system. To diagnose potential catalytic converter issues, costly test equipment, such as a loaded-mode dynamometer and a 5-gas analyzer, is required, so it's advisable to seek diagnosis and repairs at a dealer or authorized emission inspection facility. When performing underbody component service with the vehicle raised, inspect the converter for leaks, corrosion, dents, or damage, paying close attention to welds, flange bolts, and nuts connecting the front and rear ends; replace the converter if any damage is evident. Though catalytic converters seldom fail, they can become restricted or blocked. To check for a restricted converter, use a vacuum gauge to assess the impact of a blocked exhaust on intake vacuum, following a specific procedure involving recording vacuum readings at idle and under throttle conditions. If the fourth reading is significantly lower than the idle reading, it suggests exhaust system restriction, potentially due to a plugged catalytic converter or other obstructions like an exhaust pipe or muffler. To replace the catalytic converter, lift the vehicle securely on jackstands, apply penetrating oil to catalyst-to-exhaust manifold studs, clamp bolt nuts, and bracket fasteners, allowing time for penetration. Simultaneously, disconnect the downstream oxygen sensor and remove it. Next, remove the upper and lower catalyst mounting nuts, take out the catalytic converter, and discard old flange gaskets. For installation, follow the reverse procedure, using new flange gaskets and replacing any damaged fasteners while ensuring tight nut fastening.

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