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Audi A4 Engine Emission Parts

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PCV Breather Hose

ES#3188745 - 48006 - PCV Breather Hose - Connects the PCV valve to intake manifold - Dorman - Audi Volkswagen

Connects the PCV valve to intake manifold affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Dorman - Corporate Logo
ES#:
3188745
Mfg#:
48006
Ships in 5 Business Days
$24.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Leak Detection Pump Elbow

ES#270501 - 026133784G - Leak Detection Pump Elbow - Connects the leak detection pump to the vacuum reservoir adapter - Genuine Volkswagen Audi - Audi Volkswagen

Connects the leak detection pump to the vacuum reservoir adapter affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
270501
Mfg#:
026133784G
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.

$21.99

This product was last offered at the strikethrough price on
06-07-2026

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

Silicone Breather Hose

ES#2966832 - 034-101-3023 - Silicone Breather Hose - Connects to the breather valve under the intake manifold - 034Motorsport - Audi Volkswagen

Connects to the breather valve under the intake manifold affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
From VIN 8E-3-040001 up to VIN 8E-3-500000, splits are in the 2003 model year

Brand:
034Motorsport - Corporate Logo
ES#:
2966832
Mfg#:
034-101-3023
Ships in 3 Business Days
$31.00 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 affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
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
06-07-2026

$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 affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
467883
Mfg#:
N10303504
Ships in 5 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
06-07-2026

$91.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Charcoal Canister Hose

ES#436539 - 8E0201946H - Charcoal Canister Hose - Connects charcoal canister to hard pipe - Genuine Volkswagen Audi - Audi

Connects charcoal canister to hard pipe affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
436539
Mfg#:
8E0201946H
Ships in 5 Business Days
8% off MSRP

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

$100.00

This product was last offered at the strikethrough price on
06-07-2026

$91.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

PVC Vent Tube

ES#2662134 - 06B103213T - PVC Vent Tube - Connects the hose connector to the PCV elbow - Genuine Volkswagen Audi - Audi Volkswagen

Connects the hose connector to the PCV elbow affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
2662134
Mfg#:
06B103213T
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.

$100.00

This product was last offered at the strikethrough price on
06-07-2026

$90.99 USD
Free Shipping
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 affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
ATP - Corporate Logo
ES#:
5051
Mfg#:
ATP-FLS-022
Ships in 7 Business Days
$12.95 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Valve Cover Breather Adapter - 21mm Nipple Fittings

ES#3432298 - 034-101-5004 - Valve Cover Breather Adapter - 21mm Nipple Fittings - DIY breather port adapter to allow a provision for custom catch can setups on 2.0T FSI - 034Motorsport - Audi Volkswagen

DIY breather port adapter to allow a provision for custom catch can setups on 2.0T FSI affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
FSI Engines only - To be used for DIY custom catch can setups

Brand:
034Motorsport - Corporate Logo
ES#:
3432298
Mfg#:
034-101-5004
Ships in 3 Business Days
$90.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

PCV Elbow Hose

ES#2806315 - 06L133514E - PCV Elbow Hose - A hose that connects the PCV to the solenoid line - Genuine Volkswagen Audi - Audi

A hose that connects the PCV to the solenoid line affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
For vehicles with CYMC engine code only

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
2806315
Mfg#:
06L133514E
Ships in 3 Business Days
14% off MSRP

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

$20.99

This product was last offered at the strikethrough price on
06-07-2026

$17.99 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 affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
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

Angled Breather Hose

ES#277662 - 058133784AF - Angled Breather Hose - Connects the check valve and the suction jet pipe - Genuine Volkswagen Audi - Audi

Connects the check valve and the suction jet pipe affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
277662
Mfg#:
058133784AF
Ships in 4 Business Days
10% off MSRP

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

$47.99

This product was last offered at the strikethrough price on
06-07-2026

$42.99 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 affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
Bremmen Parts - Corporate Logo
ES#:
4818429
Mfg#:
06A103247
Ships on Sep 25, 2026
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ON SALE! SAVE 18%
$7.99

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

$6.52 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Rear Oxygen Sensor - Priced Each

ES#3625343 - 1K0998262T - Rear Oxygen Sensor - Priced Each - Keep your engine running efficiently - FAE - Audi Volkswagen

Keep your engine running efficiently affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
FAE - Corporate Logo
ES#:
3625343
Mfg#:
1K0998262T
Ships on Jul 1, 2026
$83.99 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 affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
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)

ES#4883737 - 06F129101P - Pressure Control Valve (PCV) - Also called the "breather valve" or "oil separator" - Rein - Audi Volkswagen

Also called the "breather valve" or "oil separator" affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
We Price Match - Give Us A Call or Chat!
From production date 12/17/2005

Brand:
Rein - Corporate Logo
ES#:
4883737
Mfg#:
06F129101P
Ships in 4 Business Days
$41.99 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

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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