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

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 Catalytic Converter

Cat. Converter

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6 Catalytic Converters found

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Audi TT 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 | Base | 4 Cyl 1.8 L GAS
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Audi TT Catalytic Converter Part Number: 1J1-131-701-DX
$1584.31 MSRP: $1884.28
You Save: $299.97 (16%)
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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:
- 2000-2006 Audi TT | Base | 4 Cyl 1.8 L GAS
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Audi TT 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 | Base | 4 Cyl 1.8 L GAS
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Audi TT Converter & Pipe Part Number: 8J0-254-501-QX
$2233.63 MSRP: $2681.43
You Save: $447.80 (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:
- 2008-2009 Audi TT | Base | 4 Cyl 2.0 L GAS
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Audi TT Converter & Pipe Part Number: 8J0-254-501-NX
$2305.44 MSRP: $2749.99
You Save: $444.55 (17%)
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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:
- 2008-2009 Audi TT | Base | 4 Cyl 2.0 L GAS
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Audi TT Converter & Pipe Part Number: 8J0-254-502-EX
$2863.55 MSRP: $3419.99
You Save: $556.44 (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 | Base | 4 Cyl 2.0 L GAS

Audi TT Catalytic Converter

The Audi TT Catalytic Converter is an emissions control device that sits in the exhaust system. It converts toxic byproducts of combustion into less harmful products through chemical reactions. The exhaust travels through a monolithic honeycomb substrate that is coated with platinum, palladium, and rhodium in the Catalytic Converter. Carbon monoxide, unburnt hydrocarbons, and oxides of nitrogen change into water vapor, carbon dioxide, and nitrogen. A correct response is possible only if the passages are not blocked and the engine operation is stable in the Audi TT line. This is due to misfires, damage to the substrate by a rich mixture, and coolant and oil contamination. The substrate can overheat in this event, or its surface may become coated, causing a reduction in conversion efficiency. The substances may also block the unit. When a Catalytic Converter gets clogged, it can restrict exhaust flow, leading to poor vehicle performance, rattling noises, an illuminated warning lamp, and excessive tailpipe emissions that may fail inspection. Physical effects caused by road debris can harm the housing of a device, while melting can occur at higher temperatures. While the same Catalytic Converter is applied in the entire Audi range, the sport platform has the component underbody. This is because there is a delicate balancing act at play in which pollutant reduction and exhaust backpressure are not easily achieved since the increased restriction can affect power delivery. When the air-fuel ratios in the engine are maintained correctly, the Audi system will help the Catalytic Converter stay in its designed temperature range where the catalysts remain active but do not suffer breakdown in the structure. In general, this part is important in maintaining the regulated emission limits of Audi TT and supporting dependable drivability.

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 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 needs now.

Audi TT 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?
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.

Related Audi TT Parts

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2009 Catalytic Converter 2008 Catalytic Converter 2006 Catalytic Converter 2005 Catalytic Converter 2004 Catalytic Converter 2003 Catalytic Converter 2002 Catalytic Converter 2001 Catalytic Converter 2000 Catalytic Converter

Genuine Audi TT Catalytic Converter

6 Catalytic Converters found

Audi TT Converter & Pipe Part Number: 8N0-254-501-X

Audi TT Catalytic Converter Part Number: 1J1-131-701-DX

Audi TT Catalytic Converter Part Number: 8N0-254-400-CX

Audi TT Converter & Pipe Part Number: 8J0-254-501-QX

Audi TT Converter & Pipe Part Number: 8J0-254-501-NX

Audi TT Converter & Pipe Part Number: 8J0-254-502-EX

Audi TT Catalytic Converter

Audi TT Catalytic Converter Parts and Q&A

Related Audi TT Parts

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