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Audi A4 Engine Emission Parts

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Vacuum System Repair Kit

ES#2515457 - 51731257971KT - Vacuum System Repair Kit - Kit includes vacuum T fittings, vacuum line, and one way check valve - Assembled By ECS - Audi Volkswagen

Kit includes vacuum T fittings, vacuum line, and one way check valve 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#:
2515457
Mfg#:
51731257971KT
In Stock
ON SALE! SAVE 16%
$53.99

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

$45.24 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Pressure Control Valve (PCV)

ES#4883644 - 06H103495AK - Pressure Control Valve (PCV) - Also referred to as the breather valve or oil separator - Rein - Audi

Also referred to as 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!
Fits from production date 3/31/2012 - Please check existing part number before ordering

Brand:
Rein - Corporate Logo
ES#:
4883644
Mfg#:
06H103495AK
In Stock
$60.99

This product was last offered at the strikethrough price on
04-27-2026

$55.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Breather Tube

ES#4339552 - 06H103213J - Breather Tube - Located on the rear of the valve cover, a common boost leak area - Hamburg Tech - Audi

Located on the rear of the valve cover, a common boost leak area 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#:
4339552
Mfg#:
06H103213J
In Stock
$68.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Oxygen Sensor Tool - 22mm

ES#3673912 - B8800067 - Oxygen Sensor Tool - 22mm - 1/2" Drive - 7/8" x 6" - Extra Long - Bav Auto Tools - Audi BMW Volkswagen Mercedes Benz MINI Porsche
ECS Tuning recommends this product.

1/2" Drive - 7/8" x 6" - Extra Long affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
Bav Auto Tools - Corporate Logo
ES#:
3673912
Mfg#:
B8800067
Ships on Aug 10, 2026
Auto Notify
ON SALE! SAVE 20%
$29.99

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

$23.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Gas Cap With Strap

ES#2084494 - 4F0201550J - Gas Cap With Strap - Replace your leaking cap, or the one you left at the pump - Genuine Volkswagen Audi - Audi

Replace your leaking cap, or the one you left at the pump affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
For sedan/avant models only

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
2084494
Mfg#:
4F0201550J
In Stock at Vendor
$107.99

This product was last offered at the strikethrough price on
04-17-2026

$84.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Secondary Air Injection Pump

ES#1844013 - 078906601M - Secondary Air Injection Pump - Keep your engine running efficiently - Pierburg - Audi Volkswagen

Keep your engine running efficiently affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Engine codes ATW & AWM up to VIN 8D-Y-100000, split is in the 2000 model year

Brand:
Pierburg - Corporate Logo
ES#:
1844013
Mfg#:
078906601M
In Stock at Vendor
$713.99

This product was last offered at the strikethrough price on
02-21-2026

$484.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Vacuum System Repair Kit

ES#279586 - 06A198011B - Vacuum System Repair Kit - Restore engine performance with this new kit - Genuine Volkswagen Audi - Audi Volkswagen

Restore engine performance with this new kit affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
279586
Mfg#:
06A198011B
Ships in 2 Business Days
17% off MSRP

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

$178.32

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

$148.36 USD
Free Shipping

PCV Breather Hose

ES#3439117 - 06L103213AD - PCV Breather Hose - Connects PCV to the intake manifold - Genuine Volkswagen Audi - Audi

Connects PCV to the intake manifold 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#:
3439117
Mfg#:
06L103213AD
Ships in 2 Business Days
1% off MSRP

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

$155.00

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

$152.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Billet Catch Can Kit

ES#2848071 - CTSCCB8TFSi - Billet Catch Can Kit - Reduce oil deposits that lower performance - CTS - Audi

Reduce oil deposits that lower performance affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Up to the 2012 model year

Brand:
CTS - Corporate Logo
ES#:
2848071
Mfg#:
CTSCCB8TFSI
Back Ordered
Auto Notify
$449.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Gas Cap With Strap

ES#3514670 - 4F0201550J - Gas Cap With Strap - Replace your leaking cap, or the one you left at the pump - URO - Audi

Replace your leaking cap, or the one you left at the pump affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
We Price Match - Give Us A Call or Chat!
For sedan/avant models only

Brand:
URO - Corporate Logo
ES#:
3514670
Mfg#:
4F0201550J
In Stock
$29.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Front Oxygen Sensor - Priced Each

ES#319089 - 1K0998262L - Front Oxygen Sensor - Priced Each - Keep your engine running efficiently - Genuine Volkswagen Audi - Audi Volkswagen

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

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
319089
Mfg#:
1K0998262L
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.

$462.99

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

$431.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Breather Tube

ES#4758340 - 06H103213J - Breather Tube - Located on the rear of the valve cover, a common boost leak area - URO - Audi

Located on the rear of the valve cover, a common boost leak area 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#:
4758340
Mfg#:
06H103213J
In Stock
$67.12 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Reinforced Silicone Breather Hose Kit

ES#2864539 - 034-101-3003 - Reinforced Silicone Breather Hose Kit - Upgrade from weaker rubber hoses - 034Motorsport - Audi

Upgrade from weaker rubber hoses affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
From VIN 8E-3-500001, split is in the 2003 model year

Brand:
034Motorsport - Corporate Logo
ES#:
2864539
Mfg#:
034-101-3003
In Stock
$237.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

VWR Billet Fuel Filler Cap - Screw-In Type

ES#4447602 - VWR190000 - VWR Billet Fuel Filler Cap - Screw-In Type - Beautifully over-engineered in customary RacingLine fashion to give an exquisite feel and beautiful appearance - Make refueling a pleasure! - Racingline - Audi Volkswagen

Beautifully over-engineered in customary RacingLine fashion to give an exquisite feel and beautiful appearance - Make refueling a pleasure! affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
For vehicles with threaded screw-in style gas caps only. Please confirm prior to ordering.

Brand:
Racingline - Corporate Logo
ES#:
4447602
Mfg#:
VWR190000
Ships in 2 Business Days
$137.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Secondary Air Injection Pump

ES#4742865 - 079959231L - Secondary Air Injection Pump - Keep your engine running efficiently - URO - Audi

Keep your engine running efficiently 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#:
4742865
Mfg#:
079959231L
In Stock
$329.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Vacuum Pump

ES#4785767 - 06J145100P - Vacuum Pump - Generates vacuum when under positive pressure - URO - Audi

Generates vacuum when under positive pressure 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#:
4785767
Mfg#:
06J145100P
In Stock
Limited Qty Sale
$172.99

This product was last offered at the strikethrough price on
05-15-2026

$148.99 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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