Shop Our Clearance Sale - Up To 80% Off FREE SHIPPING on Orders $49+ *exclusions apply

Menu

Call Us330-331-2003 ChatLive Chat Text Us!
0 Shopping Cart
Your Vehicle

No Vehicle selected
Please select your vehicle below.

    • Audi
    • BMW
    • Mercedes Benz
    • MINI
    • Porsche
    • Volkswagen

Saved Vehicles

My Vehicles
You currently have no stored vehicles.

Recent Vehicles

Recent Vehicles Manage Vehicles

You currently have no recent vehicles.

We'll automatically keep fully selected vehicles here for your convenience.

Call Us330-331-2003 ChatLive Chat Text Us!
Track My Order View Order History Submit a Return Contact Us Wholesale Information Lifetime Replacement Returns and Warranty Information
0
Call Us330-331-2003 ChatLive Chat Text Us!
Track My Order View Order History Submit a Return Contact Us Wholesale Information Lifetime Replacement Returns and Warranty Information
Cancel
0
Sales & Specials
Enter Your Vehicle
garage-red
Your Vehicle Please tap 'Select' to pick a vehicle
Your Vehicle Please tap 'Select' to pick a vehicle
Select

Audi A4 Engine Emission Parts

Sort By
Filter By
Return to Top

Thin Wall Oxygen Sensor Socket

ES#4001177 - CTA2064 - Thin Wall Oxygen Sensor Socket - Out of space? Use this thin wall socket. - CTA Tools - Audi BMW Volkswagen Mercedes Benz MINI Porsche

Out of space? Use this thin wall socket. affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
CTA Tools - Corporate Logo
ES#:
4001177
Mfg#:
CTA2064
Back Ordered
Auto Notify
$17.85 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Pressure Control Valve (PCV)

ES#2718625 - 06F129101P - Pressure Control Valve (PCV) - Also called the "breather valve" or "oil separator" - Hamburg Tech - 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:
Hamburg Tech - Corporate Logo
ES#:
2718625
Mfg#:
06F129101P
In Stock
$39.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Secondary Oil Separator

ES#3624602 - 06H103464L - Secondary Oil Separator - Mounted to the side of the engine block - Hamburg Tech - Audi Volkswagen

Mounted to the side of the engine block affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
We Price Match - Give Us A Call or Chat!

Brand:
Hamburg Tech - Corporate Logo
ES#:
3624602
Mfg#:
06H103464L
Ships in 2 Business Days
$39.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Rear Oxygen Sensor - Priced Each

ES#281028 - 06E906265Q - Rear Oxygen Sensor - Priced Each - Keep your engine running efficiently - Genuine Volkswagen Audi - Audi

Keep your engine running efficiently affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Fits the left and right position

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
281028
Mfg#:
06E906265Q
Ships in 2 Business 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.

$323.34

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

$316.64 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 affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
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

Emissions Service Kit

ES#3647624 - 06d103213gKT - Emissions Service Kit - Restore proper boost levels with this kit. This kit comes with the PCV seal. - Genuine Volkswagen Audi - Audi

Restore proper boost levels with this kit. This kit comes with the PCV seal. affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Up to VIN 8E-6-165000, split is in the 2006 model year

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
3647624
Mfg#:
06D103213GKT
In Stock
$327.99

This product was last offered at the strikethrough price on
04-16-2026

$311.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Performance Crankcase Breather Hose Kit

ES#2966347 - 06A198298kt - Performance Crankcase Breather Hose Kit - Includes the "L" & "T" shaped breather hoses, 034 Billet check valve, and tube with hardware - Assembled By ECS - Audi

Includes the "L" & "T" shaped breather hoses, 034 Billet check valve, and tube with hardware affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
Assembled By ECS - Corporate Logo
ES#:
2966347
Mfg#:
06A198298KT
Ships on Aug 10, 2026
Auto Notify
ON SALE! SAVE 10%
$112.99

This product was last offered at the strikethrough price on
02-06-2026

$101.76 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Vacuum Pump

ES#3190112 - 904-818 - Vacuum Pump - Generates vacuum when under positive pressure - Dorman - Audi Volkswagen

Generates vacuum when under positive pressure affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Dorman - Corporate Logo
ES#:
3190112
Mfg#:
904-818
Ships in 4 Business Days
$301.99 USD
Free Shipping
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 affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
Assembled By ECS - Corporate Logo
ES#:
4829950
Mfg#:
06K103495BLKT1
Ships in 2 Business Days
$300.99

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

$265.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Partial Replacement

Breather Tube - Priced Each

ES#2857529 - 06C103217H - Breather Tube - Priced Each - PCV hose set assembly, includes PCV valve - Vaico - Audi

PCV hose set assembly, includes PCV valve affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
We Price Match - Give Us A Call or Chat!
Up to the 2003 model year

Brand:
Vaico - Corporate Logo
ES#:
2857529
Mfg#:
06C103217H
In Stock at Vendor
$300.02 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Leak Detection Pump

ES#4932571 - 8E0906201K - Leak Detection Pump - Diagnosis pump for fuel system - URO - Audi

Diagnosis pump for fuel system affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
URO - Corporate Logo
ES#:
4932571
Mfg#:
8E0906201K
Ships in 1 Business Day
$299.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

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 affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
We Price Match - Give Us A Call or Chat!

Brand:
URO - Corporate Logo
ES#:
4615935
Mfg#:
06B121142A
Ships in 1 Business Day
$10.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Breather Hose

ES#260985 - 058103493A - Breather Hose - Connects the PVC to the metal vent tube - Genuine Volkswagen Audi - Audi Volkswagen

Connects the PVC to the metal vent tube affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
260985
Mfg#:
058103493A
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.

$52.99

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

$47.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Purge Valve Repair Kit

ES#3426986 - 1C0906517AKT - Purge Valve Repair Kit - Common cure for DTC P0441 - Includes clamps to replace factory one-time-use clamps - Assembled By ECS - Audi Volkswagen

Common cure for DTC P0441 - Includes clamps to replace factory one-time-use clamps affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
Assembled By ECS - Corporate Logo
ES#:
3426986
Mfg#:
1C0906517AKT
In Stock
ON SALE! SAVE 23%
$47.99

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

$36.73 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Rear Oxygen Sensor

ES#281026 - 06E906265N - Rear Oxygen Sensor - Restore fuel mileage and clear codes - Genuine Volkswagen Audi - Audi

Restore fuel mileage and clear codes affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
For cylinders 4-6

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
281026
Mfg#:
06E906265N
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.

$319.99

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

$292.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Front Oxygen Sensor - Priced Each

ES#2897355 - 1K0998262L - Front 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

Brand:
Vemo - Corporate Logo
ES#:
2897355
Mfg#:
1K0998262L
Special Order: No Guaranteed ETA
$290.99 USD
Free Shipping

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.

Terms of Use Privacy Policy ECS Tuning is part of Enthusiast Auto Holdings