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Audi A4 Engine Emission Parts

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Oxygen Sensor - Priced Each

ES#2568696 - 16986 - Oxygen Sensor - Priced Each - Keep your engine running efficiently - Bosch - Audi Volkswagen

Keep your engine running efficiently We Price Match - Give Us A Call or Chat!

Brand:
Bosch - Corporate Logo
ES#:
2568696
Mfg#:
16986
In Stock
$144.99

This product was last offered at the strikethrough price on
05-07-2026

$139.71 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

PCV / Intake Block Off Cap

ES#2864670 - 004136ecs02 - PCV / Intake Block Off Cap - Used to plug the PCV or intake manifold side port on TSI or FSI engines - ECS - Audi Volkswagen

Used to plug the PCV or intake manifold side port on TSI or FSI engines 10X Entries Into Our F80 M3 Sweepstakes

For vehicles with plastic intake manifolds

Brand:
ECS - Corporate Logo
ES#:
2864670
Mfg#:
004136ECS02
In Stock
ON SALE! SAVE 35%
$75.99

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

$49.13 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Pressure Control Valve (PCV)

ES#1928559 - 06F129101P - Pressure Control Valve (PCV) - Also called the "breather valve" or "oil separator" - Genuine Volkswagen Audi - Audi Volkswagen

Also called the "breather valve" or "oil separator" From production date 12/17/2005

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
1928559
Mfg#:
06F129101P
In Stock
11% off MSRP

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

$144.99

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

$128.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

-10AN ORB X 3/4" Hose Barb Fitting Assembly - Priced Each

ES#3187875 - 003779ECS10 - -10AN ORB X 3/4" Hose Barb Fitting Assembly - Priced Each - Universal fitting for ECS Tuning Catch can to use a 3/4" Hose - ECS - Audi BMW Volkswagen MINI

Universal fitting for ECS Tuning Catch can to use a 3/4" Hose 10X Entries Into Our F80 M3 Sweepstakes

Brand:
ECS - Corporate Logo
ES#:
3187875
Mfg#:
003779ECS10
In Stock
ON SALE! SAVE 25%
$39.99

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

$29.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Gas Cap

ES#2832685 - 8K0201550N - Gas Cap - Includes seal and retaining strap - Genuine Volkswagen Audi - Audi

Includes seal and retaining strap

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
2832685
Mfg#:
8K0201550N
In Stock
9% off MSRP

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

$73.33

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

$66.95 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Oil Separator/PCV Valve

ES#4213747 - 06K103495BL - Oil Separator/PCV Valve - Also called the "breather valve" or "oil separator" - Rein - Audi Volkswagen

Also called the "breather valve" or "oil separator" 2X Entries Into Our F80 M3 Sweepstakes
We Price Match - Give Us A Call or Chat!
For vehicles with CYMC engine code only

Brand:
Rein - Corporate Logo
ES#:
4213747
Mfg#:
06K103495BL
Back Ordered
Auto Notify
ON SALE!
$124.99

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

$118.74 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Emissions Service Kit

ES#11562 - 06F198207 - Emissions Service Kit - Restore proper boost levels with this kit. This kit comes with the PCV seal. - Assembled By ECS - Audi

Restore proper boost levels with this kit. This kit comes with the PCV seal. 10X Entries Into Our F80 M3 Sweepstakes
From VIN 8E-6-165001, split is in the 2006 model year

Brand:
Assembled By ECS - Corporate Logo
ES#:
11562
Mfg#:
06F198207
In Stock
ON SALE!
$192.99

This product was last offered at the strikethrough price on
06-15-2026

$186.80 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Oxygen Sensor - Priced Each

ES#2539127 - 1K0998262D - Oxygen Sensor - Priced Each - Keep your engine running efficiently - Bosch - Audi Volkswagen

Keep your engine running efficiently We Price Match - Give Us A Call or Chat!

Brand:
Bosch - Corporate Logo
ES#:
2539127
Mfg#:
1K0998262D
Ships in 1 Business Day
$193.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Valve Cover PCV Adapter Plate

ES#2931590 - 006235ECS01 - Valve Cover PCV Adapter Plate - Add a catch can to your stock valve cover with this billet breather adapter - ECS - Audi Volkswagen

Add a catch can to your stock valve cover with this billet breather adapter 10X Entries Into Our F80 M3 Sweepstakes

Brand:
ECS - Corporate Logo
ES#:
2931590
Mfg#:
006235ECS01
In Stock
ON SALE! SAVE 15%
$90.99

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

$77.34 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Shouldered Nut - Priced Each

ES#466552 - N01508210 - Shouldered Nut - Priced Each - Install new hardware with your new parts. M6 - Genuine Volkswagen Audi - Audi Volkswagen

Install new hardware with your new parts. M6

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
466552
Mfg#:
N01508210
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.

$3.55

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

$3.44 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Pressure Control Valve (PCV) Repair Kit

ES#3659030 - 06h103495ahktKT - Pressure Control Valve (PCV) Repair Kit - Also called the "breather valve" or "oil separator". Located on top of the valve cover. - Assembled By ECS - Audi Volkswagen

Also called the "breather valve" or "oil separator". Located on top of the valve cover. 10X Entries Into Our F80 M3 Sweepstakes
Fits up to production date 3/31/2012 - Please check existing part number before ordering

Brand:
Assembled By ECS - Corporate Logo
ES#:
3659030
Mfg#:
06H103495AHKTKT
In Stock
ON SALE!
$90.51

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

$87.88 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Silicone Upper PCV Hose Kit

ES#3612684 - 023473ECS03 - Silicone Upper PCV Hose Kit - Replace your failure-prone plastic PCV hose with a long term, high quality solution - ECS - Audi Volkswagen

Replace your failure-prone plastic PCV hose with a long term, high quality solution 10X Entries Into Our F80 M3 Sweepstakes

Brand:
ECS - Corporate Logo
ES#:
3612684
Mfg#:
023473ECS03
In Stock
ON SALE! SAVE 25%
$61.99

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

$46.49 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Purge Valve

ES#3447 - 1C0906517A - Purge Valve - Common cure for DTC P0441 - Bosch - Audi Volkswagen Porsche

Common cure for DTC P0441 We Price Match - Give Us A Call or Chat!

Brand:
Bosch - Corporate Logo
ES#:
3447
Mfg#:
1C0906517A
In Stock
$69.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Solenoid Valve - Priced Each

ES#274849 - 037906283C - Solenoid Valve - Priced Each - Common cure for DTC P0441 - Genuine Volkswagen Audi - Audi Volkswagen

Common cure for DTC P0441

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
274849
Mfg#:
037906283C
In Stock
16% off MSRP

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

$216.65

This product was last offered at the strikethrough price on
03-18-2026

$181.89 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Secondary Air Injection Pump

ES#4465429 - 078906601M - Secondary Air Injection Pump - Keep your engine running efficiently - URO - Audi Volkswagen

Keep your engine running efficiently 2X Entries Into Our F80 M3 Sweepstakes
We Price Match - Give Us A Call or Chat!
Engine codes ATW & AWM up to VIN 8D-Y-100000, split is in the 2000 model year

Brand:
URO - Corporate Logo
ES#:
4465429
Mfg#:
078906601M
In Stock
$224.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Reinforced Silicone Breather Hose Kit

ES#2864540 - 034-101-3004 - Reinforced Silicone Breather Hose Kit - Upgrade from weaker rubber hoses - 034Motorsport - Audi Volkswagen

Upgrade from weaker rubber hoses 2X Entries Into Our F80 M3 Sweepstakes
From VIN 8E-3-040001 up to VIN 8E-3-500000, splits are in the 2003 model year

Brand:
034Motorsport - Corporate Logo
ES#:
2864540
Mfg#:
034-101-3004
In Stock
$237.00 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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