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Audi B6 S4 V8 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 4 Business Days
$97.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Remanufactured Catalytic Converter - Left

ES#2500792 - 8E0254505SXKIT - Remanufactured Catalytic Converter - Left - Price includes a $125 refundable core charge - Genuine Volkswagen Audi - Audi

Price includes a $125 refundable core charge For vehicles with automatic transmission only

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
2500792
Mfg#:
8E0254505SXKIT
Ships on Oct 28, 2026
$4439.99 USD
Free Shipping
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

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

Remanufactured Catalytic Converter - Right

ES#2532864 - 8E0254554QXKT - Remanufactured Catalytic Converter - Right - Price includes a $210 refundable core charge - Genuine Volkswagen Audi - Audi

Price includes a $210 refundable core charge For vehicles with automatic transmission only

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
2532864
Mfg#:
8E0254554QXKT
Ships on Oct 28, 2026
$4103.99 USD
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
In Stock
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

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 - Priced Each

ES#11898 - 16978 - Oxygen Sensor - Priced Each - Keep your engine running efficiently - Bosch - Audi

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

Brand:
Bosch - Corporate Logo
ES#:
11898
Mfg#:
16978
Ships in 2 Business Days
$128.99

This product was last offered at the strikethrough price on
05-19-2026

$118.99 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
In Stock
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

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

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
Ships in 2 Business Days
$16.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Oxygen Sensor Socket

ES#4370861 - W1267 - Oxygen Sensor Socket - Removes oxygen sensors located in the exhaust. - Performance Tool - Audi BMW Volkswagen Mercedes Benz MINI Porsche

Removes oxygen sensors located in the exhaust.

Brand:
Performance Tool - Corporate Logo
ES#:
4370861
Mfg#:
W1267
Ships in 2 Business Days
$12.80 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Innovate LC-2 Wideband O2 Controller Kit

ES#4809696 - 38770 - Innovate LC-2 Wideband O2 Controller Kit - Includes Lambda cable & 8-foot sensor cable. - Innovate Motorsports - Audi BMW Volkswagen Mercedes Benz MINI Porsche

Includes Lambda cable & 8-foot sensor cable.

Brand:
Innovate Motorsports - Corporate Logo
ES#:
4809696
Mfg#:
38770
In Stock at Vendor
$212.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Thin Wall Oxygen Sensor Socket

ES#4001177 - CTA2064 - Thin Wall Oxygen Sensor Socket - Out of space? Use this thin wall socket. - CTA Tools - Audi BMW Volkswagen Mercedes Benz MINI Porsche

Out of space? Use this thin wall socket.

Brand:
CTA Tools - Corporate Logo
ES#:
4001177
Mfg#:
CTA2064
In Stock
$17.85 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Front Oxygen Sensor - Priced Each

ES#319086 - 1K0998262F - Front Oxygen Sensor - Priced Each - Keep your engine running efficiently - Genuine Volkswagen Audi - Audi Volkswagen

Keep your engine running efficiently Fits left and right position

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
319086
Mfg#:
1K0998262F
Ships in 3 Business Days
12% off MSRP

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

$413.99

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

$364.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Oxygen Sensor Socket - 22mm

Properly remove stubborn o2 sensors.

Brand:
Hazet - Corporate Logo
ES#:
4490396
Mfg#:
4680-1
Ships in 2 Business Days
$118.99

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

$115.99 USD
Free Shipping
on orders $49 and up
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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