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Audi A4 Engine Emission Parts

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Oxygen Sensor - Priced Each

ES#2539127 - 1K0998262D - Oxygen Sensor - Priced Each - Keep your engine running efficiently - Bosch - Audi Volkswagen

Keep your engine running efficiently Earn 5% back in ECS Rewards on orders placed 10/26/26 - 10/31/26. Redeem 11/26/26 - 12/1/26. Terms & conditions apply
We Price Match - Give Us A Call or Chat!

Brand:
Bosch - Corporate Logo
ES#:
2539127
Mfg#:
1K0998262D
In Stock
$193.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Oil Separator/PCV Emissions Service Kit

ES#4147925 - 06H103495ACKIT - Oil Separator/PCV Emissions Service Kit - Everything you need to replace a faulty PCV or to perform some preventative maintenance - Vaico - Audi Volkswagen

Everything you need to replace a faulty PCV or to perform some preventative maintenance Earn 5% back in ECS Rewards on orders placed 10/26/26 - 10/31/26. Redeem 11/26/26 - 12/1/26. Terms & conditions apply
We Price Match - Give Us A Call or Chat!

Brand:
Vaico - Corporate Logo
ES#:
4147925
Mfg#:
06H103495ACKIT
In Stock
$257.99

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

$182.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Purge Valve

ES#3447 - 1C0906517A - Purge Valve - Common cure for DTC P0441 - Bosch - Audi Volkswagen Porsche

Common cure for DTC P0441 Earn 5% back in ECS Rewards on orders placed 10/26/26 - 10/31/26. Redeem 11/26/26 - 12/1/26. Terms & conditions apply
We Price Match - Give Us A Call or Chat!

Brand:
Bosch - Corporate Logo
ES#:
3447
Mfg#:
1C0906517A
In Stock
$69.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Vacuum System Purge Valve & Hose Set

ES#4339557 - 06H133781CK - Vacuum System Purge Valve & Hose Set - Includes the solenoid valve and check valve with 3 hoses - Hamburg Tech - Audi

Includes the solenoid valve and check valve with 3 hoses Earn 5% back in ECS Rewards on orders placed 10/26/26 - 10/31/26. Redeem 11/26/26 - 12/1/26. Terms & conditions apply
We Price Match - Give Us A Call or Chat!
Fits pre-facelift (up to 2012) models with CAEB engine code

Brand:
Hamburg Tech - Corporate Logo
ES#:
4339557
Mfg#:
06H133781CK
In Stock
$99.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Vacuum Pump Gasket

ES#3432705 - 06H103121J - Vacuum Pump Gasket - Recommended to be replaced when replacing vacuum pump. - Elring - Audi Volkswagen

Recommended to be replaced when replacing vacuum pump. 2X Entries Into Our F80 M3 Sweepstakes Earn 5% back in ECS Rewards on orders placed 10/26/26 - 10/31/26. Redeem 11/26/26 - 12/1/26. Terms & conditions apply
We Price Match - Give Us A Call or Chat!

Brand:
Elring - Corporate Logo
ES#:
3432705
Mfg#:
06H103121J
In Stock
$8.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Pressure Control Valve (PCV)

ES#4883644 - 06H103495AK - Pressure Control Valve (PCV) - Also referred to as the breather valve or oil separator - Rein - Audi

Also referred to as the breather valve or oil separator 2X Entries Into Our F80 M3 Sweepstakes Earn 5% back in ECS Rewards on orders placed 10/26/26 - 10/31/26. Redeem 11/26/26 - 12/1/26. Terms & conditions apply
We Price Match - Give Us A Call or Chat!
Fits from production date 3/31/2012 - Please check existing part number before ordering

Brand:
Rein - Corporate Logo
ES#:
4883644
Mfg#:
06H103495AK
In Stock
$55.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Breather Tube

ES#4818471 - 06H103213J - Breather Tube - Located on the rear of the valve cover, a common boost leak area - Bremmen Parts - Audi

Located on the rear of the valve cover, a common boost leak area 10X Entries Into Our F80 M3 Sweepstakes Earn 5% back in ECS Rewards on orders placed 10/26/26 - 10/31/26. Redeem 11/26/26 - 12/1/26. Terms & conditions apply

Brand:
Bremmen Parts - Corporate Logo
ES#:
4818471
Mfg#:
06H103213J
In Stock
ON SALE! SAVE 10%
$58.99

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

$53.09 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Oil Separator/PCV Valve

ES#4213747 - 06K103495BL - Oil Separator/PCV Valve - Also called the "breather valve" or "oil separator" - Rein - Audi Volkswagen

Also called the "breather valve" or "oil separator" 2X Entries Into Our F80 M3 Sweepstakes Earn 5% back in ECS Rewards on orders placed 10/26/26 - 10/31/26. Redeem 11/26/26 - 12/1/26. Terms & conditions apply
We Price Match - Give Us A Call or Chat!
For vehicles with CYMC engine code only

Brand:
Rein - Corporate Logo
ES#:
4213747
Mfg#:
06K103495BL
Back Ordered
$124.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Billet Catch Can Kit

ES#2848071 - CTSCCB8TFSi - Billet Catch Can Kit - Reduce oil deposits that lower performance - CTS - Audi

Reduce oil deposits that lower performance Earn 5% back in ECS Rewards on orders placed 10/26/26 - 10/31/26. Redeem 11/26/26 - 12/1/26. Terms & conditions apply
Up to the 2012 model year

Brand:
CTS - Corporate Logo
ES#:
2848071
Mfg#:
CTSCCB8TFSI
Back Ordered
ON SALE!
$449.99

This product was last offered at the strikethrough price on
09-29-2026

$424.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Pressure Control Valve (PCV)

ES#2715561 - 06F129101R - Pressure Control Valve (PCV) - Also called the "breather valve" or "oil separator" - Genuine Volkswagen Audi - Audi Volkswagen

Also called the "breather valve" or "oil separator" Earn 5% back in ECS Rewards on orders placed 10/26/26 - 10/31/26. Redeem 11/26/26 - 12/1/26. Terms & conditions apply
Up to production date 12/16/2005

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
2715561
Mfg#:
06F129101R
Ships in 1-2 days
18% off MSRP

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

$133.32

This product was last offered at the strikethrough price on
09-28-2026

$109.32 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Breather Tube

ES#2099472 - 06D103215A - Breather Tube - If you have boost leaks, get a new breather tube today - Genuine Volkswagen Audi - Audi

If you have boost leaks, get a new breather tube today Earn 5% back in ECS Rewards on orders placed 10/26/26 - 10/31/26. Redeem 11/26/26 - 12/1/26. Terms & conditions apply
Fits from VIN 8E-6-165 001 - Split is in the 2006 model year

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
2099472
Mfg#:
06D103215A
In Stock
20% off MSRP

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

$143.33

This product was last offered at the strikethrough price on
10-28-2026

$115.07 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

034Motorsport Catch Can Kit

ES#3544026 - 034-101-1010 - 034Motorsport Catch Can Kit - Keep your intake tract clean and carbon free - 034Motorsport - Audi

Keep your intake tract clean and carbon free 2X Entries Into Our F80 M3 Sweepstakes Earn 5% back in ECS Rewards on orders placed 10/26/26 - 10/31/26. Redeem 11/26/26 - 12/1/26. Terms & conditions apply
Not for vehicles with metal intake manifold (Flex Fuel)

Brand:
034Motorsport - Corporate Logo
ES#:
3544026
Mfg#:
034-101-1010
Ships in 2 Business Days
$717.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Oxygen Sensor - Priced Each

ES#8367 - 1K0998262 - Oxygen Sensor - Priced Each - Keep your engine running efficiently - Bosch - Audi Volkswagen

Keep your engine running efficiently Earn 5% back in ECS Rewards on orders placed 10/26/26 - 10/31/26. Redeem 11/26/26 - 12/1/26. Terms & conditions apply
We Price Match - Give Us A Call or Chat!

Brand:
Bosch - Corporate Logo
ES#:
8367
Mfg#:
1K0998262
Ships in 1 Business Day
$110.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

PCV Service Kit

ES#4829948 - 06k103495blKT - PCV Service Kit - Everything you need to replace a faulty PCV or to perform some preventative maintenance - Genuine Volkswagen Audi - Audi

Everything you need to replace a faulty PCV or to perform some preventative maintenance Earn 5% back in ECS Rewards on orders placed 10/26/26 - 10/31/26. Redeem 11/26/26 - 12/1/26. Terms & conditions apply
For vehicles with CYMC engine code only

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
4829948
Mfg#:
06K103495BLKT
In Stock
$395.99

This product was last offered at the strikethrough price on
08-04-2026

$390.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Secondary Air Injection Pump

ES#4465429 - 078906601M - Secondary Air Injection Pump - Keep your engine running efficiently - URO - Audi Volkswagen

Keep your engine running efficiently 2X Entries Into Our F80 M3 Sweepstakes Earn 5% back in ECS Rewards on orders placed 10/26/26 - 10/31/26. Redeem 11/26/26 - 12/1/26. Terms & conditions apply
We Price Match - Give Us A Call or Chat!
Engine codes ATW & AWM up to VIN 8D-Y-100000, split is in the 2000 model year

Brand:
URO - Corporate Logo
ES#:
4465429
Mfg#:
078906601M
In Stock
$224.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Rear Oxygen Sensor - Priced Each

ES#4069386 - 06E906265Q - Rear Oxygen Sensor - Priced Each - Fits left and right side - Bosch - Audi

Fits left and right side Earn 5% back in ECS Rewards on orders placed 10/26/26 - 10/31/26. Redeem 11/26/26 - 12/1/26. Terms & conditions apply
We Price Match - Give Us A Call or Chat!

Brand:
Bosch - Corporate Logo
ES#:
4069386
Mfg#:
06E906265Q
In Stock
$192.18 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

More About Engine Emission Parts

Repairing failed emission components doesn't just turn off the check engine light so you can pass your local emissions test, it also improves performance and fuel economy. ECS stocks all common emission controls, from oxygen sensors to PCV valves.

Let us help you find the parts that fit your Audi

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

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