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Volkswagen MK4 Engine Emission Parts

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Vacuum Check Valve - Priced Each

ES#276312 - 046905291A - Vacuum Check Valve - Priced Each - In line vacuum one way valve to ensure proper air suction - Genuine Volkswagen Audi - Volkswagen

In line vacuum one way valve to ensure proper air suction

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
276312
Mfg#:
046905291A
Ships in 1 day
10% off MSRP

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

$58.99

This product was last offered at the strikethrough price on
07-28-2026

$52.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Retaining Spring - Priced Each

ES#4871901 - 037121142A - Retaining Spring - Priced Each - Keep your lines and hoses secure - Bremmen Parts - Audi Volkswagen

Keep your lines and hoses secure 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
Bremmen Parts - Corporate Logo
ES#:
4871901
Mfg#:
037121142A
In Stock
ON SALE! SAVE 37%
$7.99

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

$5.00 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Air Pump Hose

ES#279366 - 06A131127M - Air Pump Hose - Hose that runs from the secondary air pump to the Combi Valve - Genuine Volkswagen Audi - Volkswagen

Hose that runs from the secondary air pump to the Combi Valve For vehicles with an AZG, AVH, BBW, or BEV engine code only

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
279366
Mfg#:
06A131127M
Special Order: No Guaranteed ETA
6% off MSRP

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

$111.99

This product was last offered at the strikethrough price on
07-28-2026

$104.99 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 For vehicles with AWD, AWW or AWP engine codes, with production date up to 6/30/2003

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
258895
Mfg#:
06A103247
Ships in 1 day
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
07-28-2026

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

Three-Way Valve Housing

ES#2812997 - 06A103247 - Three-Way Valve Housing - 'T' shaped connection below the intake manifold - Hamburg Tech - Audi Volkswagen

'T' shaped connection below the intake manifold We Price Match - Give Us A Call or Chat!
For vehicles with AWW or AWP engine codes, with production date up to 6/30/2003

Brand:
Hamburg Tech - Corporate Logo
ES#:
2812997
Mfg#:
06A103247
Ships in 2 Business Days
ON SALE!
$11.99

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

$11.39 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 1 day
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
07-28-2026

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

Connecting Pipe

ES#3234780 - 06A133817Q - Connecting Pipe - Small pipe that is attached to combi valve and connecting pipe to the air pump - Gates - Audi Volkswagen

Small pipe that is attached to combi valve and connecting pipe to the air pump

Brand:
Gates - Corporate Logo
ES#:
3234780
Mfg#:
06A133817Q
Ships on Aug 17, 2026
$96.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Breather Tube - Valve housing to breather hose

ES#3623882 - 06A103213BK - Breather Tube - Valve housing to breather hose - URO - Volkswagen

2X Entries For Our 25th Anniversary Sweepstakes!
We Price Match - Give Us A Call or Chat!

Brand:
URO - Corporate Logo
ES#:
3623882
Mfg#:
06A103213BK
Ships in 1 Business Day
$23.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Shut-Off Valve

ES#4985 - 06A131102F - Shut-Off Valve - Also known as the 'combi valve' - Pierburg - Audi Volkswagen

Also known as the 'combi valve'

Brand:
Pierburg - Corporate Logo
ES#:
4985
Mfg#:
06A131102F
Special Order: No Guaranteed ETA
$94.85 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Breather Hose

ES#3462917 - 06A103221AN - Breather Hose - 3-way breather hose at sits on top of the valve cover - Kayser - Audi Volkswagen

3-way breather hose at sits on top of the valve cover For models with AWP engine code - From the 2003 model year

Brand:
Kayser - Corporate Logo
ES#:
3462917
Mfg#:
06A103221AN
In Stock
ON SALE! SAVE 54%
$39.99

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

$18.44 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Intake Pipe

ES#307367 - 1J0131128AB - Intake Pipe - Pipe from check valve to secondary air pump - Genuine Volkswagen Audi - Volkswagen

Pipe from check valve to secondary air pump

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
307367
Mfg#:
1J0131128AB
Ships in 7 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.

$96.99

This product was last offered at the strikethrough price on
07-28-2026

$90.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

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 For vehicles with ALH engine code only

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!

For vehicles with AWD, AWW or AWP engine codes, with production date up to 6/30/2003

Brand:
Bremmen Parts - Corporate Logo
ES#:
4818429
Mfg#:
06A103247
Ships in 9 Business Days
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

Oxygen Sensor - Priced Each

ES#2598388 - 06A906262Q - Oxygen Sensor - Priced Each - Keep your engine running efficiently, restore MPG, and clear check engine lights - Vemo - Audi Volkswagen

Keep your engine running efficiently, restore MPG, and clear check engine lights For vehicles with AWD engine code only

Brand:
Vemo - Corporate Logo
ES#:
2598388
Mfg#:
06A906262Q
Special Order: No Guaranteed ETA
$144.99

This product was last offered at the strikethrough price on
03-19-2026

$88.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Combi Valve

ES#3604903 - 06A131351H - Combi Valve - Also known as the Secondary Air Injection Valve - Pierburg - Volkswagen

Also known as the Secondary Air Injection Valve For vehicles with AEG engine code only

Brand:
Pierburg - Corporate Logo
ES#:
3604903
Mfg#:
06A131351H
Ships in 1-2 days
$88.73 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

EGR Cooler Pipe Hardware Kit

ES#2702227 - 038131521CA - EGR Cooler Pipe Hardware Kit - Includes everthing you need to install your EGR cooler pipe; two gaskets and 4 screws - Assembled By ECS - Volkswagen

Includes everthing you need to install your EGR cooler pipe; two gaskets and 4 screws 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
Assembled By ECS - Corporate Logo
ES#:
2702227
Mfg#:
038131521CA
In Stock
$28.99 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 Volkswagen

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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