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Audi A4 Engine Emission Parts

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Front Oxygen Sensor - Priced Each

ES#281030 - 06E906265S - Front Oxygen Sensor - Priced Each - Restore fuel mileage and clear codes - Genuine Volkswagen Audi - Audi

Restore fuel mileage and clear codes 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 the left and right position

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
281030
Mfg#:
06E906265S
Ships in 1-2 days
13% off MSRP

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

$490.99

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

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

Secondary Air Injection Hose - Outlet

ES#280915 - 06E133817J - Secondary Air Injection Hose - Outlet - Connects the secondary air pump to the EGR connecting pipe - Genuine Volkswagen Audi - Audi

Connects the secondary air pump to the EGR connecting pipe 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:
Genuine Volkswagen Audi - Corporate Logo
ES#:
280915
Mfg#:
06E133817J
Ships on Nov 16, 2026
13% off MSRP

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

$121.99

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

$105.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

APR Universal Oil Catch Can - AN Fittings

ES#4487795 - MS100218 - APR Universal Oil Catch Can - AN Fittings - Universal/Service part for APR's MS100199 full catch can system - APR - Audi Volkswagen Porsche

Universal/Service part for APR's MS100199 full catch can system Call In Or Chat For Best Price! 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:
APR - Corporate Logo
ES#:
4487795
Mfg#:
MS100218
Ships in 9 Business Days
ON SALE! SAVE 10%
$234.99

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

$211.45 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

EGR Valve

ES#2993025 - 079131101AR - EGR Valve - Also known as the 'combi valve' - Genuine Volkswagen Audi - Audi Volkswagen

Also known as the 'combi valve' 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
Engine code AWM

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
2993025
Mfg#:
079131101AR
Ships in 1-2 days
13% off MSRP

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

$483.99

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

$418.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Lower PCV Bleeder Valve Upgrade Kit

ES#5482584 - 06a103247KT7 - Lower PCV Bleeder Valve Upgrade Kit - Eliminate dangerous boost leaks and permanently fix your engine's most vulnerable vacuum path with this billet check valve and T-housing bundle. - Assembled By ECS - Audi Volkswagen

Eliminate dangerous boost leaks and permanently fix your engine's most vulnerable vacuum path with this billet check valve and T-housing bundle. 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:
Assembled By ECS - Corporate Logo
ES#:
5482584
Mfg#:
06A103247KT7
In Stock
$58.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Oxygen Sensor -Left (Cylinders 4-6)

ES#319091 - 1K0998262N - Oxygen Sensor -Left (Cylinders 4-6) - Found before the catalytic converter - Genuine Volkswagen Audi - Audi Volkswagen

Found before the catalytic converter 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:
Genuine Volkswagen Audi - Corporate Logo
ES#:
319091
Mfg#:
1K0998262N
Ships in 1-2 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.

$462.99

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

$405.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Hex Bolt - Priced Each

ES#468018 - N10340703 - Hex Bolt - Priced Each - Install new hardware with your new parts. M6x20 - Genuine Volkswagen Audi - Audi Volkswagen

Install new hardware with your new parts. M6x20 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
Used to secure the breather tube to the valve cover, 2 required per car

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
468018
Mfg#:
N10340703
In Stock
25% off MSRP

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

$3.99

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

$2.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

PCV Breather Hose

ES#281504 - 06J103221A - PCV Breather Hose - Connects PCV to the intake manifold - Genuine Volkswagen Audi - Audi Volkswagen

Connects PCV to the intake manifold 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:
Genuine Volkswagen Audi - Corporate Logo
ES#:
281504
Mfg#:
06J103221A
In Stock
Limited Qty Sale
$99.46

This product was last offered at the strikethrough price on
06-15-2026

$79.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Check Valve - Priced Each

ES#4818424 - 058905291K - Check Valve - Priced Each - Used in multiple locations in the vacuum system - Bremmen Parts - Audi Volkswagen

Used in multiple locations in the vacuum system 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#:
4818424
Mfg#:
058905291K
In Stock
$4.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Oxygen Sensor - Priced Each

ES#319085 - 1K0998262D - Oxygen Sensor - Priced Each - Keep your engine running efficiently - Genuine Volkswagen Audi - 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

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
319085
Mfg#:
1K0998262D
Ships in 1-2 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.

$449.99

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

$394.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Secondary Oil Separator

ES#281346 - 06H103464L - Secondary Oil Separator - Mounted to the side of the engine block - Genuine Volkswagen Audi - Audi Volkswagen

Mounted to the side of the engine block 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:
Genuine Volkswagen Audi - Corporate Logo
ES#:
281346
Mfg#:
06H103464L
Ships in 1-2 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.

$437.99

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

$383.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Connecting Pipe

ES#280068 - 06B133817S - Connecting Pipe - Connects the secondary air pump to the lower hard pipe - Genuine Volkswagen Audi - Audi

Connects the secondary air pump to the lower hard pipe 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:
Genuine Volkswagen Audi - Corporate Logo
ES#:
280068
Mfg#:
06B133817S
Ships in 3 Business Days
9% off MSRP

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

$140.00

This product was last offered at the strikethrough price on
06-15-2026

$126.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Vacuum Pump

ES#2878582 - 06E145100T - Vacuum Pump - Generates vacuum when under positive pressure - Vaico - Audi

Generates vacuum when under positive pressure 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#:
2878582
Mfg#:
06E145100T
Ships in 1 Business Day
$390.99

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

$379.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Breather Hose

ES#277547 - 058103221E - Breather Hose - 'S' shaped hose attached to the bleeder valve under the intake manifold - Genuine Volkswagen Audi - Audi Volkswagen

'S' shaped hose attached to the bleeder valve under the intake manifold 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 VIN 8E-3-040000, split is in the 2003 model year

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
277547
Mfg#:
058103221E
Ships in 1-2 days
13% off MSRP

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

$71.99

This product was last offered at the strikethrough price on
10-26-2026

$62.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Leak Detection Pump

ES#452225 - 8K0906271 - Leak Detection Pump - Tests the fueling system for leaks - Genuine Volkswagen Audi - Audi

Tests the fueling system for leaks 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 3/5/2012

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
452225
Mfg#:
8K0906271
Ships in 1-2 days
13% off MSRP

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

$425.00

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

$368.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Secondary Air Injection Pump

ES#1876813 - 06A959253B - Secondary Air Injection Pump - Keep your engine running efficiently - MTC - 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
Engine codes ATW & AWM from VIN 8D-Y-100001, split is in the 2000 model year

Brand:
MTC - Corporate Logo
ES#:
1876813
Mfg#:
06A959253B
Ships in 10 Business Days
$366.99 USD
Free Shipping
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

ECS Tuning is not affiliated with any automobile manufacturers.
Manufacturer names and/or part numbers are used only for identification purposes.

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