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Audi A4 Engine Emission Parts

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Purge Valve Securing Ring

ES#277645 - 058133459 - Purge Valve Securing Ring - Rubber ring that secures the purge valve in place - Genuine Volkswagen Audi - Audi

Rubber ring that secures the purge valve in place

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
277645
Mfg#:
058133459
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.

$24.99

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

$21.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Breather Hose

ES#2801688 - 06B133783BC - Breather Hose - Connects the suction jet pump to the intake manifold - Rein - Audi Volkswagen

Connects the suction jet pump to the intake manifold 2X Entries Into Our F80 M3 Sweepstakes
We Price Match - Give Us A Call or Chat!
Engine codes ATW & AWM

Brand:
Rein - Corporate Logo
ES#:
2801688
Mfg#:
06B133783BC
Ships in 1 Business Day
$10.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Silicone Breather Hose

ES#2966843 - 034-104-2001 - Silicone Breather Hose - Connects the PVC to the metal vent tube - 034Motorsport - Audi

Connects the PVC to the metal vent tube 2X Entries Into Our F80 M3 Sweepstakes

Brand:
034Motorsport - Corporate Logo
ES#:
2966843
Mfg#:
034-104-2001
Ships in 2 Business Days
$21.00 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Vacuum Check Valve

ES#2708852 - 1168000378 - Vacuum Check Valve - Common source of emission related issues - URO - Audi Volkswagen Mercedes Benz

Common source of emission related issues 2X Entries Into Our F80 M3 Sweepstakes
We Price Match - Give Us A Call or Chat!

Brand:
URO - Corporate Logo
ES#:
2708852
Mfg#:
1168000378
Ships in 1 Business Day
$4.09 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Check Valve Replacement Kit

ES#2823248 - 07C133529AKT - Check Valve Replacement Kit - Restore engine performance - Assembled By ECS - Audi

Restore engine performance 10X Entries Into Our F80 M3 Sweepstakes

Brand:
Assembled By ECS - Corporate Logo
ES#:
2823248
Mfg#:
07C133529AKT
In Stock
ON SALE! SAVE 25%
$26.99

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

$20.23 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Elbow Hose

ES#3188728 - 46074 - Elbow Hose - Connects the hard vent tube to the intake hose - Dorman - Audi Volkswagen

Connects the hard vent tube to the intake hose Up to VIN 84-4-000001, split is in the 2004 model year

Brand:
Dorman - Corporate Logo
ES#:
3188728
Mfg#:
46074
Ships in 4 Business Days
$19.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Purge Valve Securing Ring

ES#280049 - 06B133459D - Purge Valve Securing Ring - Rubber ring that secures the purge valve in place - Genuine Volkswagen Audi - Audi

Rubber ring that secures the purge valve in place

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
280049
Mfg#:
06B133459D
Ships in 1-2 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
09-11-2026

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

Offset Oxygen Sensor Wrench- Extended

ES#4001169 - CTA2065 - Offset Oxygen Sensor Wrench- Extended - Extra length is needed sometimes - CTA Tools - Audi BMW Volkswagen Mercedes Benz MINI Porsche

Extra length is needed sometimes

Brand:
CTA Tools - Corporate Logo
ES#:
4001169
Mfg#:
CTA2065
Back Ordered
$19.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Silicone Breather Hose Elbow

ES#2966841 - 034-101-3046 - Silicone Breather Hose Elbow - Connects the pressure regulator to the hard breather tube - 034Motorsport - Audi

Connects the pressure regulator to the hard breather tube 2X Entries Into Our F80 M3 Sweepstakes
From VIN 8E-4-000001, split is in the 2004 model year

Brand:
034Motorsport - Corporate Logo
ES#:
2966841
Mfg#:
034-101-3046
Ships in 2 Business Days
$19.00 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Crankcase Breather Hose

ES#4151156 - 078103223B - Crankcase Breather Hose - Small "S" breather hose that runs on the backside of the intake manifold - Rein - Audi Volkswagen

Small "S" breather hose that runs on the backside of the intake manifold 2X Entries Into Our F80 M3 Sweepstakes
We Price Match - Give Us A Call or Chat!

Brand:
Rein - Corporate Logo
ES#:
4151156
Mfg#:
078103223B
Ships in 3 Business Days
$17.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Hose Clamp - Priced Each

ES#2803685 - N90739901 - Hose Clamp - Priced Each - Install new clamps to stay leak free. 31x10x0.8mm - Rein - Audi Volkswagen

Install new clamps to stay leak free. 31x10x0.8mm 2X Entries Into Our F80 M3 Sweepstakes
We Price Match - Give Us A Call or Chat!

Brand:
Rein - Corporate Logo
ES#:
2803685
Mfg#:
N90739901
Ships in 3 Business Days
$8.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Breather Assembly Gasket

ES#2815771 - 48103771 - Breather Assembly Gasket - Seals the breather assembly to the engine - Hamburg Tech - Audi

Seals the breather assembly to the engine We Price Match - Give Us A Call or Chat!
Engine codes AEB & ATW

Brand:
Hamburg Tech - Corporate Logo
ES#:
2815771
Mfg#:
48103771
Ships in 1 Business Day
$5.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Hex Bolt - Priced Each

ES#467233 - N10005010 - Hex Bolt - Priced Each - Install new hardware with your new parts. M6x30 - Genuine Volkswagen Audi - Audi Volkswagen

Install new hardware with your new parts. M6x30 Engine codes ATW & AWM. Secures the secondary air pump to the bracket up to VIN 8D-Y-100000, split is in the 2000 model year

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
467233
Mfg#:
N10005010
Ships in 4 Business Days
$5.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Pinch Clamp - Priced Each

ES#467718 - N10233401 - Pinch Clamp - Priced Each - Install new hardware with your new parts. 16.2x7x0.6 - Genuine Volkswagen Audi - Audi Volkswagen

Install new hardware with your new parts. 16.2x7x0.6

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
467718
Mfg#:
N10233401
Ships in 1-2 days
24% off MSRP

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

$3.94

This product was last offered at the strikethrough price on
09-11-2026

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

Pressure Control Valve (PCV)

ES#5307949 - 034129101B - Pressure Control Valve (PCV) - Located on the turbo inlet pipe. 19mm - Bremmen Parts - Audi Volkswagen

Located on the turbo inlet pipe. 19mm 10X Entries Into Our F80 M3 Sweepstakes
Engine codes AEB & ATW

Brand:
Bremmen Parts - Corporate Logo
ES#:
5307949
Mfg#:
034129101B
Special Order: No Guaranteed ETA
ON SALE! SAVE 22%
$22.99

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

$17.94 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Pressure Control Valve (PCV) - Priced Each

ES#2575453 - 06B103245 - Pressure Control Valve (PCV) - Priced Each - Located under the intake manifold - OE Aftermarket - Audi Volkswagen

Located under the intake manifold From VIN 8E-3-040001 up to VIN 8E-3-500000, splits are in the 2003 model year

Brand:
OE Aftermarket - Corporate Logo
ES#:
2575453
Mfg#:
06B103245
Ships in 3 Business Days
$15.99 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

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

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