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Audi B7 A4 Quattro 2.0T

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Audi B7 A4 Quattro 2.0T Exhaust Emission Parts

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7/8"(22mm) Flexible Oxygen Sensor Wrench

ES#240942 - FO-78 - 7/8"(22mm) Flexible Oxygen Sensor Wrench - The proper tool to remove difficult-to-reach oxygen sensors - Schwaben - Audi BMW Volkswagen Mercedes Benz MINI Porsche
ECS Tuning recommends this product.

The proper tool to remove difficult-to-reach oxygen sensors 10X Entries Into Our F80 M3 Sweepstakes

Brand:
Schwaben - Corporate Logo
ES#:
240942
Mfg#:
FO-78
In Stock
ON SALE! SAVE 25%
$48.99

This product was last offered at the strikethrough price on
05-02-2026

$36.74 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Universal Catalytic Converter - 2.25"

ES#4005308 - 602205 - Universal Catalytic Converter - 2.25" - 2.25" inlet/outlet, 14" length of converter itself, 6" width & 4" height - Emico - Audi BMW Volkswagen Mercedes Benz MINI Porsche

2.25" inlet/outlet, 14" length of converter itself, 6" width & 4" height

Brand:
Emico - Corporate Logo
ES#:
4005308
Mfg#:
602205
Ships in 3 Business Days
$97.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Locking Nut - Priced Each

ES#471981 - N91130801 - Locking Nut - Priced Each - Locking nut with flange. M8x1.25mm - Genuine Volkswagen Audi - Audi Volkswagen

Locking nut with flange. M8x1.25mm Locking nut that secures catalytic converter to downpipe

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
471981
Mfg#:
N91130801
In Stock
$1.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Oxygen Sensor - Priced Each

ES#2568696 - 16986 - Oxygen Sensor - Priced Each - Keep your engine running efficiently - Bosch - Audi Volkswagen

Keep your engine running efficiently We Price Match - Give Us A Call or Chat!

Brand:
Bosch - Corporate Logo
ES#:
2568696
Mfg#:
16986
In Stock
$144.99

This product was last offered at the strikethrough price on
05-07-2026

$139.71 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Remanufactured Catalytic Converter

ES#2535499 - 8E0254200QXKT - Remanufactured Catalytic Converter - Price includes a $252 refundable core charge - Genuine Volkswagen Audi - Audi

Price includes a $252 refundable core charge

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
2535499
Mfg#:
8E0254200QXKT
Ships in 9 Business Days
$3641.70

This product was last offered at the strikethrough price on
08-31-2026

$3623.53 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Self-Locking Nut - Priced Each

ES#2588753 - N90369001 - Self-Locking Nut - Priced Each - Install new hardware with your new parts. M10x1.5 - Rein - Audi BMW Volkswagen

Install new hardware with your new parts. M10x1.5 2X Entries Into Our F80 M3 Sweepstakes
We Price Match - Give Us A Call or Chat!
Secures the catalytic converter to the turbocharger

Brand:
Rein - Corporate Logo
ES#:
2588753
Mfg#:
N90369001
In Stock
$4.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Oxygen Sensor Tool - Angled Handle - 7/8" - Bavarian Autosport

ES#3673911 - B8800066 - Oxygen Sensor Tool - Angled Handle - 7/8" - Bavarian Autosport - Slotted, pivoting head has both hexagon and double hexagon drive. Angled handle reaches around obstructions. - Bav Auto Tools - Audi BMW Volkswagen Mercedes Benz MINI Porsche
ECS Tuning recommends this product.

Slotted, pivoting head has both hexagon and double hexagon drive. Angled handle reaches around obstructions. 10X Entries Into Our F80 M3 Sweepstakes

Brand:
Bav Auto Tools - Corporate Logo
ES#:
3673911
Mfg#:
B8800066
Ships on Sep 30, 2026
ON SALE! SAVE 25%
$49.99

This product was last offered at the strikethrough price on
05-02-2026

$37.49 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Oxygen Sensor - Left (Cylinders 4-6)

ES#2162754 - 1K0998262N - Oxygen Sensor - Left (Cylinders 4-6) - Found before the catalytic converter - Bosch - Audi Volkswagen

Found before the catalytic converter We Price Match - Give Us A Call or Chat!

Brand:
Bosch - Corporate Logo
ES#:
2162754
Mfg#:
1K0998262N
Ships in 1 Business Day
$239.99

This product was last offered at the strikethrough price on
04-10-2026

$223.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Universal 4-Wire Oxygen Sensor - Priced Each

ES#2532224 - 15733 - Universal 4-Wire Oxygen Sensor - Priced Each - Four wire universal OBD-II Oxygen sensor - Bosch - Audi BMW Volkswagen

Four wire universal OBD-II Oxygen sensor We Price Match - Give Us A Call or Chat!

Brand:
Bosch - Corporate Logo
ES#:
2532224
Mfg#:
15733
In Stock
$74.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Oxygen Sensor Tool - 22mm

ES#3673912 - B8800067 - Oxygen Sensor Tool - 22mm - 1/2" Drive - 7/8" x 6" - Extra Long - Bav Auto Tools - Audi BMW Volkswagen Mercedes Benz MINI Porsche
ECS Tuning recommends this product.

1/2" Drive - 7/8" x 6" - Extra Long 10X Entries Into Our F80 M3 Sweepstakes

Brand:
Bav Auto Tools - Corporate Logo
ES#:
3673912
Mfg#:
B8800067
Ships on Sep 30, 2026
ON SALE! SAVE 20%
$29.99

This product was last offered at the strikethrough price on
05-02-2026

$23.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Catalytic Converter Installation Kit

ES#3028723 - 8D0253115KT3 - Catalytic Converter Installation Kit - Includes the necessary hardware and gaskets to install the catalytic converter - Assembled By ECS - Audi Volkswagen

Includes the necessary hardware and gaskets to install the catalytic converter 10X Entries Into Our F80 M3 Sweepstakes

Brand:
Assembled By ECS - Corporate Logo
ES#:
3028723
Mfg#:
8D0253115KT3
In Stock
ON SALE! SAVE 21%
$59.99

This product was last offered at the strikethrough price on
05-02-2026

$47.50 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

3 Pc. OXygen Sensor Wrench Set

ES#4001175 - CTA2073 - 3 Pc. OXygen Sensor Wrench Set - Get the complete set. - CTA Tools - Audi BMW Volkswagen Mercedes Benz MINI Porsche

Get the complete set.

Brand:
CTA Tools - Corporate Logo
ES#:
4001175
Mfg#:
CTA2073
In Stock
$50.01 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Direct-Fit Catalytic Converter

ES#2616072 - 22960 - Direct-Fit Catalytic Converter - Keep your emissions in check - Magnaflow - Audi Volkswagen

Keep your emissions in check

Brand:
Magnaflow - Corporate Logo
ES#:
2616072
Mfg#:
22960
Back Ordered
$897.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Off Set O2 Sensor Wrench

ES#4371880 - W80491 - Off Set O2 Sensor Wrench - Offset design for confined areas. - Performance Tool - Audi BMW Volkswagen Mercedes Benz MINI Porsche

Offset design for confined areas.

Brand:
Performance Tool - Corporate Logo
ES#:
4371880
Mfg#:
W80491
In Stock
$16.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Exhaust Downpipe

ES#436592 - 8E0253301EE - Exhaust Downpipe - Connects the catalytic converter to the center exhaust muffler - Genuine Volkswagen Audi - Audi

Connects the catalytic converter to the center exhaust muffler

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
436592
Mfg#:
8E0253301EE
Ships in 3 Business Days
6% off MSRP

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$805.99

This product was last offered at the strikethrough price on
08-31-2026

$759.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Direct-Fit Catalytic Converter

ES#2618131 - 24190 - Direct-Fit Catalytic Converter - Keep your emissions in check - Magnaflow - Audi

Keep your emissions in check *Not legal for sale, installation or use on vehicles registered in the state of California or Colorado*
New York & Federal Compliant. Not for use in California or Colorado.

Brand:
Magnaflow - Corporate Logo
ES#:
2618131
Mfg#:
24190
Ships in 1 Business Day
$703.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

More About Exhaust Emission Parts

Oxygen sensors, catalytic converters, and other critical emissions components not only cause Check Engine Lights when they fail, but they'll also keep you from registering your car. Make sure your emissions system is functioning properly so you can continue to drive your car legally.

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Manufacturer names and/or part numbers are used only for identification purposes.

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