What is the function and importance of the Catalytic Converter (three-way) on Audi TT Quattro?

The carbon monoxide, unburned hydrocarbons, and nitrogen oxides that are produced from the operation of gasoline vehicle engines, including the catalyst-equipped engines, must be treated for their removal prior to their discharge to the atmosphere. The operation is only correct when the air/fuel ratio is held in a narrow range, the feedback to the controller for mixture control comes from oxygen sensors. Although the catalytic converter does not need to be maintained on a routine basis, damage may occur to the component when malfunctions which will raise its temperature to above its normal operating range occur. These malfunctions include incorrect ignition timing, air/fuel mixture problems, engine misfire, prolonged engine idling, and extended high engine loads. A broken converter could result in less power, stalling, rattling in the exhaust system, and overemissions. This type of vehicle uses a second heated oxygen sensor to monitor the operation of the catalyst, and when the converter does not oxidize used combustion gases properly, the Engine Control Module stores a Diagnostic Trouble Code. When there is an exhaust leak in the system, such as a leak between the cylinder head and the catalytic converter, it can cause running problems, false DTCs or converter failure. In order to check the function of the catalytic converter, an infrared exhaust gas analyzer must be used to check the air/fuel mixture adjustment at the exhaust system test port upstream of the catalytic converter and again at the tailpipe. A properly functioning catalytic converter will have a lower tailpipe reading than the test port reading. If the readings are the same or if the tailpipe reading is slightly lower than the test port reading, the catalytic converter is faulty.

Genuine Audi TT Quattro Catalytic Converter

Cat. Converter

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11 Catalytic Converters found

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Audi TT Quattro Converter & Pipe Part Number: 8N0-254-501-X
$1926.61 MSRP: $2312.86
You Save: $386.25 (17%)
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Product Specifications
- Other Name: Catalyst; Front Pipe
- Warranty: This genuine part is guaranteed by Audi's factory warranty.
Fits the following Vehicles:
- 2000-2006 Audi TT Quattro | ALMS Edition, Base | 4 Cyl 1.8 L GAS
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Audi TT Quattro Catalytic Converter Part Number: 1J1-131-701-DX
$1584.31 MSRP: $1884.28
You Save: $299.97 (16%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Catalyst; Converter & Pipe
- Warranty: This genuine part is guaranteed by Audi's factory warranty.
Fits the following Vehicles:
- 2000-2005 Audi TT Quattro | ALMS Edition, Base | 4 Cyl 1.8 L GAS
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Audi TT Quattro Catalytic Converter Part Number: 8N0-254-400-CX
$1782.62 MSRP: $2140.00
You Save: $357.38 (17%)
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Product Specifications
- Other Name: Catalyst; Converter & Pipe
- Replaces: 8N0-254-400-X, 8N0-131-701-EX
- Warranty: This genuine part is guaranteed by Audi's factory warranty.
Fits the following Vehicles:
- 2001-2006 Audi TT Quattro | ALMS Edition, Base | 4 Cyl 1.8 L GAS
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Audi TT Quattro Converter & Pipe Part Number: 8J0-254-501-QX
$2233.63 MSRP: $2681.43
You Save: $447.80 (17%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Catalyst; Front Pipe
- Warranty: This genuine part is guaranteed by Audi's factory warranty.
Fits the following Vehicles:
- 2009 Audi TT Quattro | Base | 4 Cyl 2.0 L GAS
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Audi TT Quattro Converter & Pipe Part Number: 8J0-254-500-BX
$2527.55 MSRP: $3034.27
You Save: $506.72 (17%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Catalyst; Front Pipe
- Warranty: This genuine part is guaranteed by Audi's factory warranty.
Fits the following Vehicles:
- 2008-2009 Audi TT Quattro | Base | 6 Cyl 3.2 L GAS
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Audi TT Quattro Catalytic Converter Part Number: 1J1-131-701-JX
$1891.33 MSRP: $2252.86
You Save: $361.53 (17%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Catalyst; Converter & Pipe
- Warranty: This genuine part is guaranteed by Audi's factory warranty.
Fits the following Vehicles:
- 2004-2006 Audi TT Quattro | Base, Special Edition | 6 Cyl 3.2 L GAS
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Audi TT Quattro Converter & Pipe Part Number: 8J0-254-501-NX
$2305.44 MSRP: $2749.99
You Save: $444.55 (17%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Catalyst; Front Pipe
- Replaces: 8J0-254-501-FX
- Warranty: This genuine part is guaranteed by Audi's factory warranty.
Fits the following Vehicles:
- 2009-2010 Audi TT Quattro | Base | 4 Cyl 2.0 L GAS
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Audi TT Quattro Catalytic Converter Part Number: 8S0-254-500-BX
$2367.32 MSRP: $2824.27
You Save: $456.95 (17%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Catalyst; Converter & Pipe
- Warranty: This genuine part is guaranteed by Audi's factory warranty.
Fits the following Vehicles:
- 2016-2023 Audi TT Quattro | Base | 4 Cyl 2.0 L GAS
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Audi TT Quattro Converter & Pipe Part Number: 8J0-254-502-EX
$2863.55 MSRP: $3419.99
You Save: $556.44 (17%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Catalyst; Front Pipe
- Warranty: This genuine part is guaranteed by Audi's factory warranty.
Fits the following Vehicles:
- 2009-2015 Audi TT Quattro | Base, Premium Plus, Prestige | 4 Cyl 2.0 L GAS
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Audi TT Quattro Converter & Pipe Part Number: 8J0-254-502-CX
$2863.55 MSRP: $3419.99
You Save: $556.44 (17%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Catalyst; Front Pipe
- Warranty: This genuine part is guaranteed by Audi's factory warranty.
Fits the following Vehicles:
- 2011-2015 Audi TT Quattro | Base, Premium Plus, Prestige | 4 Cyl 2.0 L GAS
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Audi TT Quattro Catalytic Converter Part Number: 1J0-131-089-EX
$1674.75 MSRP: $1992.86
You Save: $318.11 (16%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Catalyst
- Warranty: This genuine part is guaranteed by Audi's factory warranty.
Fits the following Vehicles:
- 2000 Audi TT Quattro | Base | 4 Cyl 1.8 L GAS

Audi TT Quattro Catalytic Converter

Choose original equipment manufacturer Catalytic Converter for great performance and strong durability. They use Audi's official craftsmanship and high-grade materials, and meet strict quality standards. Are you looking for quality Catalytic Converter at a good price? Come to our online store. We carry a wide range of genuine parts for your Audi TT Quattro and the prices are competitive. Each part comes with the manufacturer's warranty. You can install with confidence and get steady results. Over time, you'll save money and avoid hassle. Keep your maintenance simple and protect your vehicle with OEM parts. Get the quality your TT Quattro needs now.

Audi TT Quattro Catalytic Converter Parts and Q&A

Catalytic Converter
1J1-131-701-DX
Q: What is the function and importance of the Catalytic Converter (three-way) on Audi TT Quattro?
A:
The carbon monoxide, unburned hydrocarbons, and nitrogen oxides that are produced from the operation of gasoline vehicle engines, including the catalyst-equipped engines, must be treated for their removal prior to their discharge to the atmosphere. The operation is only correct when the air/fuel ratio is held in a narrow range, the feedback to the controller for mixture control comes from Oxygen Sensors. Although the catalytic converter does not need to be maintained on a routine basis, damage may occur to the component when malfunctions which will raise its temperature to above its normal operating range occur. These malfunctions include incorrect ignition timing, air/fuel mixture problems, engine misfire, prolonged engine idling, and extended high engine loads. A broken converter could result in less power, stalling, rattling in the exhaust system, and overemissions. This type of vehicle uses a second heated oxygen sensor to monitor the operation of the catalyst, and when the converter does not oxidize used combustion gases properly, the Engine Control Module stores a Diagnostic Trouble Code. When there is an exhaust leak in the system, such as a leak between the cylinder head and the catalytic converter, it can cause running problems, false DTCs or converter failure. In order to check the function of the catalytic converter, an infrared exhaust gas analyzer must be used to check the air/fuel mixture adjustment at the exhaust system test port upstream of the catalytic converter and again at the tailpipe. A properly functioning catalytic converter will have a lower tailpipe reading than the test port reading. If the readings are the same or if the tailpipe reading is slightly lower than the test port reading, the catalytic converter is faulty.