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Audi A4 Engine Emission Parts

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Hose Clamp - Priced Each

ES#263953 - N10258101 - Hose Clamp - Priced Each - Install new clamps to stay leak free. 23-35x9x.5 - Genuine Volkswagen Audi - Audi Volkswagen

Install new clamps to stay leak free. 23-35x9x.5 Secures the bleeder valve to the 'T' shaped fitting

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
263953
Mfg#:
N10258101
In Stock
3% off MSRP

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

$7.10

This product was last offered at the strikethrough price on
07-15-2026

$6.89 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Three-Way Valve Housing

ES#4818429 - 06A103247 - Three-Way Valve Housing - 'T' shaped connection below the intake manifold - Bremmen Parts - Audi Volkswagen

'T' shaped connection below the intake manifold 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
Bremmen Parts - Corporate Logo
ES#:
4818429
Mfg#:
06A103247
Ships on Aug 11, 2026
Auto Notify
ON SALE! SAVE 20%
$7.99

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

$6.39 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

O-Ring - Priced Each

ES#205046 - N90613201 - O-Ring - Priced Each - Ensure a proper seal with a new o-ring - Used in various areas on your European vehicle - Genuine Volkswagen Audi - Audi Volkswagen

Ensure a proper seal with a new o-ring - Used in various areas on your European vehicle Seals the connection between the PCV valve and the cylinder head vent hose - qty 2 needed

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
205046
Mfg#:
N90613201
Ships in 4 Business Days
$1.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Breather Tube - Priced Each

ES#4859586 - 06C103235A - Breather Tube - Priced Each - Connects the cylinder block vent cover with the PCV valve - Vaico - Audi

Connects the cylinder block vent cover with the PCV valve We Price Match - Give Us A Call or Chat!
From VIN 8E-3-325001 - To VIN 8E-3-500000, split is in the 2003 model year

Brand:
Vaico - Corporate Logo
ES#:
4859586
Mfg#:
06C103235A
In Stock at Vendor
$29.17 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Vacuum Check Valve

ES#2813146 - 07C133529A - Vacuum Check Valve - Located near off of the intake manifold connecting to the suction pump - Hamburg Tech - Audi

Located near off of the intake manifold connecting to the suction pump We Price Match - Give Us A Call or Chat!

Brand:
Hamburg Tech - Corporate Logo
ES#:
2813146
Mfg#:
07C133529A
Ships in 1 Business Day
ON SALE!
$12.99

This product was last offered at the strikethrough price on
06-25-2026

$12.34 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Oxygen Sensor - Priced Each

ES#2894981 - 078906265N - Oxygen Sensor - Priced Each - Keep your engine running efficiently - Vemo - Audi Volkswagen

Keep your engine running efficiently For engine code ATQ, fits left and right position

Brand:
Vemo - Corporate Logo
ES#:
2894981
Mfg#:
078906265N
Special Order: No Guaranteed ETA
$83.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Pressure Control Valve (PCV) - (19mm)

ES#2813013 - 06A129101D - Pressure Control Valve (PCV) - (19mm) - Located on the intake hose leading to the turbo inlet - Hamburg Tech - Audi Volkswagen

Located on the intake hose leading to the turbo inlet We Price Match - Give Us A Call or Chat!
Engine code AWM

Brand:
Hamburg Tech - Corporate Logo
ES#:
2813013
Mfg#:
06A129101D
In Stock
$11.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Oxygen Sensor

ES#5375 - 078906265D - Oxygen Sensor - Fits left &/or right sides - Bosch - Audi

Fits left &/or right sides 2X Entries For Our 25th Anniversary Sweepstakes!
We Price Match - Give Us A Call or Chat!

Brand:
Bosch - Corporate Logo
ES#:
5375
Mfg#:
078906265D
Ships in 1-2 days
$82.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Purge Valve

ES#257161 - 1C0906517A - Purge Valve - Common cure for DTC P0441 - Hudson - Audi Volkswagen

Common cure for DTC P0441

Brand:
Hudson - Corporate Logo
ES#:
257161
Mfg#:
1C0906517A
Ships in 1-2 days
$40.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Vent Tube

ES#280186 - 06C103221F - Vent Tube - Keep your engine running correctly - Genuine Volkswagen Audi - Audi

Keep your engine running correctly

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
280186
Mfg#:
06C103221F
Ships in 8 Business Days
22% off MSRP

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

$103.34

This product was last offered at the strikethrough price on
07-25-2026

$80.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

BFI FSI CrankCase Breather Adapter W/ Twin -8 To Flare Fittings

ES#5426248 - EBFI7001220C - BFI FSI CrankCase Breather Adapter W/ Twin -8 To Flare Fittings - This simple machined piece gives a clean and OEM look to your engine bay. - Black Forest Industries - Audi Volkswagen

This simple machined piece gives a clean and OEM look to your engine bay. From production date 12/17/2005

Brand:
Black Forest Industries - Corporate Logo
ES#:
5426248
Mfg#:
EBFI7001220C
Ships on Aug 17, 2026
$79.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

PCV O-Ring

ES#280865 - 06E133148A - PCV O-Ring - Seals the PCV valve to the intake manifold - Genuine Volkswagen Audi - Audi

Seals the PCV valve to the intake manifold

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
280865
Mfg#:
06E133148A
Ships in 2 Business 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.

$22.99

This product was last offered at the strikethrough price on
07-25-2026

$19.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Check Valve

ES#1895504 - 433862117 - Check Valve - Vacuum Non Return Valve - Kayser - Audi

Vacuum Non Return Valve

Brand:
Kayser - Corporate Logo
ES#:
1895504
Mfg#:
433862117
Ships in 1-2 days
$16.99

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

$15.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Oil Separator Gasket

ES#281352 - 06H103517D - Oil Separator Gasket - Seal between the oil separator and the engine block - Genuine Volkswagen Audi - Audi

Seal between the oil separator and the engine block

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
281352
Mfg#:
06H103517D
Ships in 2 Business 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.

$29.99

This product was last offered at the strikethrough price on
07-25-2026

$25.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

PCV Breather Hose

ES#3438754 - 06F103221H - PCV Breather Hose - Connects the PCV valve to intake manifold - Rein - Audi Volkswagen

Connects the PCV valve to intake manifold 2X Entries For Our 25th Anniversary Sweepstakes!
We Price Match - Give Us A Call or Chat!

Brand:
Rein - Corporate Logo
ES#:
3438754
Mfg#:
06F103221H
In Stock at Vendor
$25.91 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Universal Oxygen Sensor Bung - Priced Each

ES#5051 - ATP-FLS-022 - Universal Oxygen Sensor Bung - Priced Each - Stainless steel weld-in nut for any O2 sensor - ATP - Audi BMW Volkswagen

Stainless steel weld-in nut for any O2 sensor

Brand:
ATP - Corporate Logo
ES#:
5051
Mfg#:
ATP-FLS-022
Ships in 6 Business Days
$12.95 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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