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Audi A4 Engine Emission Parts

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Pressure Control Valve Gasket

ES#281349 - 06H103484A - Pressure Control Valve Gasket - Ensure a proper seal for the PCV or oil separator - Genuine Volkswagen Audi - Audi Volkswagen

Ensure a proper seal for the PCV or oil separator

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
281349
Mfg#:
06H103484A
Ships in 2 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.

$60.99

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

$56.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Front & Rear Oxygen Sensors - Pair

Keep your engine running efficiently 2X Entries For Our 25th Anniversary Sweepstakes!

Brand:
Bosch - Corporate Logo
ES#:
5481129
Mfg#:
1K0998262TKT
In Stock
$354.99

This product was last offered at the strikethrough price on
07-08-2026

$281.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Pressure Control Valve (PCV) - (25mm)

ES#4743014 - 06A129101F - Pressure Control Valve (PCV) - (25mm) - Located on the intake hose leading to the turbo inlet - Bremmen Parts - Audi Volkswagen

Located on the intake hose leading to the turbo inlet 10X Entries For Our 25th Anniversary Sweepstakes!

Fits from VIN 8E-4-000 001 - Split is in the 2004 model year

Brand:
Bremmen Parts - Corporate Logo
ES#:
4743014
Mfg#:
06A129101F
Ships on Oct 21, 2026
ON SALE! SAVE 21%
$58.99

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

$46.50 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Oxygen Sensor - Left (Cylinders 4-6)

ES#3419356 - 1K0998262N - Oxygen Sensor - Left (Cylinders 4-6) - Found before the catalytic converter - Walker - Audi Volkswagen

Found before the catalytic converter

Brand:
Walker - Corporate Logo
ES#:
3419356
Mfg#:
1K0998262N
In Stock at Vendor
$161.99

This product was last offered at the strikethrough price on
04-10-2026

$137.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

3/4 NPTBlock Breather Adapter

ES#4146792 - 034-101-5001 - 3/4 NPTBlock Breather Adapter - Precision CNC machined in-house to ensure unsurpassed quality and perfect fitment. Now available with a 3/4" NPT provision. - 034Motorsport - Audi Volkswagen

Precision CNC machined in-house to ensure unsurpassed quality and perfect fitment. Now available with a 3/4" NPT provision.

Brand:
034Motorsport - Corporate Logo
ES#:
4146792
Mfg#:
034-101-5001
Ships in 2 Business Days
$25.00 USD
Free Shipping

Retaining C-Clip - Priced Each

ES#4615935 - 06B121142A - Retaining C-Clip - Priced Each - Holds crank case breather tube in place, top of oil filter housing - URO - Audi Volkswagen

Holds crank case breather tube in place, top of oil filter housing 2X Entries For Our 25th Anniversary Sweepstakes!
We Price Match - Give Us A Call or Chat!

Brand:
URO - Corporate Logo
ES#:
4615935
Mfg#:
06B121142A
In Stock
$10.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Gas Cap

ES#5341357 - 8K0201550N - Gas Cap - Includes seal and retaining strap - URO - Audi

Includes seal and retaining strap 2X Entries For Our 25th Anniversary Sweepstakes!

Brand:
URO - Corporate Logo
ES#:
5341357
Mfg#:
8K0201550N
Ships in 1 Business Day
ON SALE!
$35.99

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

$34.19 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Performance Baffled Oil Catch Can & Bracket

ES#3096719 - 010371ECS01KT2 - Performance Baffled Oil Catch Can & Bracket - Includes our Baffled Oil Catch Can with the B7 specific mounting bracket for custom applications - ECS - Audi

Includes our Baffled Oil Catch Can with the B7 specific mounting bracket for custom applications 10X Entries For Our 25th Anniversary Sweepstakes!

This kit does not include the PCV adapter, block off plate, or lines

Brand:
ECS - Corporate Logo
ES#:
3096719
Mfg#:
010371ECS01KT2
In Stock
ON SALE! SAVE 10%
$301.99

This product was last offered at the strikethrough price on
06-13-2026

$271.79 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Silicone Breather Hose Connector

ES#2966837 - 034-101-3014 - Silicone Breather Hose Connector - Connects the valve cover to the vent tubes - 034Motorsport - Audi Volkswagen

Connects the valve cover to the vent tubes Engine code AWM

Brand:
034Motorsport - Corporate Logo
ES#:
2966837
Mfg#:
034-101-3014
In Stock
$45.00 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Pressure Control Valve (PCV) - (19mm)

ES#4818408 - 035103245A - Pressure Control Valve (PCV) - (19mm) - Located under the intake manifold - Bremmen Parts - Audi Volkswagen

Located under the intake manifold 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
Bremmen Parts - Corporate Logo
ES#:
4818408
Mfg#:
035103245A
In Stock
ON SALE! SAVE 26%
$10.99

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

$8.15 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Emissions Service Kit

ES#11561 - 06f198206 - Emissions Service Kit - Restore proper boost levels with this kit. This kit comes without the PCV seal. - Genuine Volkswagen Audi - Audi

Restore proper boost levels with this kit. This kit comes <b>without</b> the PCV seal. From VIN 8E-6-165001, split is in the 2006 model year

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
11561
Mfg#:
06F198206
In Stock
$265.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Crankcase Breather Hose - With PCV Valve

ES#2803647 - 078103224R - Crankcase Breather Hose - With PCV Valve - Large breather hose that runs around the intake manifold - Rein - Audi Volkswagen

Large breather hose that runs around the intake manifold 2X Entries For Our 25th Anniversary Sweepstakes!
We Price Match - Give Us A Call or Chat!

Brand:
Rein - Corporate Logo
ES#:
2803647
Mfg#:
078103224R
Ships in 1 Business Day
$52.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Torx Bolt - Priced Each

ES#5708 - n10347003 - Torx Bolt - Priced Each - Install new hardware with your new parts. M6x16 - Genuine Volkswagen Audi - Audi Volkswagen

Install new hardware with your new parts. M6x16 Used to secure the vent tube to the turbocharger

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
5708
Mfg#:
N10347003
In Stock
$3.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

PCV Service Kit

ES#4829950 - 06K103495BLKT1 - PCV Service Kit - Everything you need to replace a faulty PCV or to perform some preventative maintenance - Assembled By ECS - Audi

Everything you need to replace a faulty PCV or to perform some preventative maintenance 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
Assembled By ECS - Corporate Logo
ES#:
4829950
Mfg#:
06K103495BLKT1
Ships in 4 Business Days
$300.99

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

$259.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Partial Replacement

Check Valve - Priced Each

ES#4818424 - 058905291K - Check Valve - Priced Each - Used in multiple locations in the vacuum system - Bremmen Parts - Audi Volkswagen

Used in multiple locations in the vacuum system 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
Bremmen Parts - Corporate Logo
ES#:
4818424
Mfg#:
058905291K
Ships on Aug 11, 2026
Auto Notify
ON SALE! SAVE 35%
$4.99

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

$3.26 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Emissions Service Kit

ES#2219669 - 06A103213F - Emissions Service Kit - Complete PCV Refresh Kit for your engine - Assembled By ECS - Audi

Complete PCV Refresh Kit for your engine 10X Entries For Our 25th Anniversary Sweepstakes!
Up to VIN 8E-3-040000, split is in the 2003 model year

Brand:
Assembled By ECS - Corporate Logo
ES#:
2219669
Mfg#:
06A103213F
Ships in 3 Business Days
ON SALE!
$268.99

This product was last offered at the strikethrough price on
01-29-2026

$253.53 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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