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Audi A4 Engine Emission Parts

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Oxygen Sensor - 4 Pin - Black

Located after the catalytic converter For models with BGN engine code only - Fits left and right sides

Brand:
Walker - Corporate Logo
ES#:
3690282
Mfg#:
1K0998262R
Ships in 1-2 days
$106.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Clamp - 33.5x10x0.8

ES#469992 - N90489801 - Clamp - 33.5x10x0.8 - Used to secure the PCV hose - Genuine Volkswagen Audi - Audi

Used to secure the PCV hose From VIN 8E-4-000001, split is in the 2004 model year

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
469992
Mfg#:
N90489801
In Stock
$1.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Crankcase Ventilation Tube

ES#259526 - 06B103213AK - Crankcase Ventilation Tube - Connects the hose connector to the 3 way valve housing - Genuine Volkswagen Audi - Audi

Connects the hose connector to the 3 way valve housing From the 2004 model year

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
259526
Mfg#:
06B103213AK
Ships in 1-2 days
1% off MSRP

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

$106.67

This product was last offered at the strikethrough price on
09-10-2026

$105.09 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Three-Way Valve Housing

ES#258895 - 06A103247 - Three-Way Valve Housing - 'T' shaped connection below the intake manifold - Genuine Volkswagen Audi - Audi Volkswagen

'T' shaped connection below the intake manifold

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
258895
Mfg#:
06A103247
Ships in 5 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.

$22.99

This product was last offered at the strikethrough price on
09-10-2026

$20.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Front Oxygen Sensor - Priced Each

Keep your engine running efficiently 10X Entries Into Our F80 M3 Sweepstakes

Brand:
Bremmen Parts - Corporate Logo
ES#:
5470646
Mfg#:
1K0998262L
Ships on Nov 30, 2026
ON SALE! SAVE 20%
$129.99

This product was last offered at the strikethrough price on
05-29-2026

$103.99 USD
This product is lifetime replacement eligible Lifetime Replacement

Crankcase Breather Hose

ES#263051 - 078103223B - Crankcase Breather Hose - Small "S" breather hose that runs on the backside of the intake manifold - Genuine Volkswagen Audi - Audi Volkswagen

Small "S" breather hose that runs on the backside of the intake manifold

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
263051
Mfg#:
078103223B
Ships in 5 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.

$109.99

This product was last offered at the strikethrough price on
09-10-2026

$102.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

EGR Valve Replacement Kit

ES#2766074 - 078131120KKT6 - EGR Valve Replacement Kit - Complete gasket and hardware to replace the EGR valve - Assembled By ECS - Audi

Complete gasket and hardware to replace the EGR valve 10X Entries Into Our F80 M3 Sweepstakes

Brand:
Assembled By ECS - Corporate Logo
ES#:
2766074
Mfg#:
078131120KKT6
Ships in 3 Business Days
ON SALE! SAVE 16%
$58.99

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

$49.47 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

EGR Valve Gasket - Priced Each

ES#283692 - 078131120K - EGR Valve Gasket - Priced Each - Ensure a proper seal - Genuine Volkswagen Audi - Audi Volkswagen

Ensure a proper seal

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
283692
Mfg#:
078131120K
Ships in 3 Business Days
7% off MSRP

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

$14.99

This product was last offered at the strikethrough price on
09-10-2026

$13.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Solenoid Valve - Priced Each

ES#3478630 - 06H906283B - Solenoid Valve - Priced Each - Control valve for the flaps inside the intake manifold - Hamburg Tech - Audi Volkswagen

Control valve for the flaps inside the intake manifold We Price Match - Give Us A Call or Chat!
Intake flap control solenoid - Fits from the 2013 model year

Brand:
Hamburg Tech - Corporate Logo
ES#:
3478630
Mfg#:
06H906283B
In Stock
$32.00 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Gas Cap

ES#5341359 - 8K0201550P - Gas Cap - Includes seal ring and retaining strap - URO - Audi

Includes seal ring and retaining strap 2X Entries Into Our F80 M3 Sweepstakes

Brand:
URO - Corporate Logo
ES#:
5341359
Mfg#:
8K0201550P
Ships in 2 Business Days
$47.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Breather Hose Connector

ES#3604076 - 06B103221F - Breather Hose Connector - Connects the valve cover to the hard pipe and pressure regulator - URO - Audi Volkswagen

Connects the valve cover to the hard pipe and pressure regulator 2X Entries Into Our F80 M3 Sweepstakes
We Price Match - Give Us A Call or Chat!
From VIN 8E-3-040001 up to VIN 8E-3-500000, splits are in the 2003 model year

Brand:
URO - Corporate Logo
ES#:
3604076
Mfg#:
06B103221F
Ships in 2 Business Days
$15.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Check Valve - Priced Each

ES#2598354 - 058905291K - Check Valve - Priced Each - Used in multiple locations in the vacuum system - Vaico - Audi Volkswagen

Used in multiple locations in the vacuum system We Price Match - Give Us A Call or Chat!

Brand:
Vaico - Corporate Logo
ES#:
2598354
Mfg#:
058905291K
Ships in 2 Business Days
$11.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Crankcase Vent Valve

ES#251123 - 06a133528d - Crankcase Vent Valve - Repair vacuum system leaks - Genuine Volkswagen Audi - Audi Volkswagen

Repair vacuum system leaks

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
251123
Mfg#:
06A133528D
In Stock
Limited Qty Sale
$105.99

This product was last offered at the strikethrough price on
08-13-2026

$94.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Oil Separator/PCV Valve Gasket

ES#4145067 - 06K103484F - Oil Separator/PCV Valve Gasket - Replacement seal for the pcv Located on top of your valve cover - Elring - Audi Volkswagen

Replacement seal for the pcv Located on top of your valve cover 2X Entries Into Our F80 M3 Sweepstakes
We Price Match - Give Us A Call or Chat!

Brand:
Elring - Corporate Logo
ES#:
4145067
Mfg#:
06K103484F
Ships on Sep 29, 2026
$22.99

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

$18.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Breather Hose

ES#279954 - 06B103224E - Breather Hose - Connects to the breather valve under the intake manifold - Genuine Volkswagen Audi - Audi

Connects to the breather valve under the intake manifold From VIN 8E-4-000001, split is in the 2004 model year

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
279954
Mfg#:
06B103224E
Ships in 1-2 days
2% off MSRP

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

$95.00

This product was last offered at the strikethrough price on
09-10-2026

$92.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Hose - Priced Each

ES#467883 - N10303504 - Hose - Priced Each - Replacement line that can be cut to size. 7.3x3.5mm - Genuine Volkswagen Audi - Audi

Replacement line that can be cut to size. 7.3x3.5mm

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
467883
Mfg#:
N10303504
Ships in 3 Business Days
7% off MSRP

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

$98.99

This product was last offered at the strikethrough price on
09-10-2026

$91.99 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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