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Audi S4 Engine Emission Parts

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Catalytic Converter

Price includes a $275.00 refundable core charge

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
4220359
Mfg#:
8W0254252TXKT
Ships in 8 Business Days
$3992.99

This product was last offered at the strikethrough price on
02-03-2026

$3684.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Vacuum Pump Gasket - 254.250

Seals the vacuum pump to the cylinder head 2X Entries For Our 25th Anniversary Sweepstakes!

Brand:
Elring - Corporate Logo
ES#:
4941118
Mfg#:
06E145417A
Special Order: No Guaranteed ETA
$10.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Vacuum Pump

Generates vacuum when under positive pressure 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
Bremmen Parts - Corporate Logo
ES#:
5480732
Mfg#:
06E145100R
Ships on Sep 28, 2026
Auto Notify
$149.99 USD
This product is lifetime replacement eligible Lifetime Replacement

Crimp Clamp - Priced Each

ES#2872946 - N10202001 - Crimp Clamp - Priced Each - Install new hardware with your new parts. 24.1x7x0.6 - Febi - Audi Volkswagen

Install new hardware with your new parts. 24.1x7x0.6 2X Entries For Our 25th Anniversary Sweepstakes!
We Price Match - Give Us A Call or Chat!

Brand:
Febi - Corporate Logo
ES#:
2872946
Mfg#:
N10202001
Special Order: No Guaranteed ETA
$6.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Oil Separator/Pressure Control Valve (PCV)

ES#4361564 - 06E103547AC - Oil Separator/Pressure Control Valve (PCV) - Located beneath the supercharger compressor - Vaico - Audi Volkswagen

Located beneath the supercharger compressor We Price Match - Give Us A Call or Chat!
Up to the 2012 model year

Brand:
Vaico - Corporate Logo
ES#:
4361564
Mfg#:
06E103547AC
Special Order: No Guaranteed ETA
$111.99 USD
Free Shipping
on orders $49 and up

Oil Separator/Pressure Control Valve (PCV)

ES#4780878 - 06M103515H - Oil Separator/Pressure Control Valve (PCV) - Also known as the "PCV". Located on the valve cover - Vaico - Audi

Also known as the "PCV". Located on the valve cover We Price Match - Give Us A Call or Chat!

Brand:
Vaico - Corporate Logo
ES#:
4780878
Mfg#:
06M103515H
Special Order: No Guaranteed ETA
$131.99 USD
Free Shipping
on orders $49 and up

Purge Valve

ES#4849628 - 1C0906517A - Purge Valve - Common cure for DTC P0441 - Vemo - Audi Volkswagen

Common cure for DTC P0441

Brand:
Vemo - Corporate Logo
ES#:
4849628
Mfg#:
1C0906517A
Special Order: No Guaranteed ETA
$21.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

EGR Valve - Right

ES#2894885 - 06E131102B - EGR Valve - Right - Also known as the 'combi valve' - Vemo - Audi Volkswagen

Also known as the 'combi valve'

Brand:
Vemo - Corporate Logo
ES#:
2894885
Mfg#:
06E131102B
Special Order: No Guaranteed ETA
$112.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

1/8" Barbed Vacuum Fittings - Set Of 10

Perfect for repairing and replacing cracked vacuum lines - Best used with 3mm to 4mm vacuum hoses 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
Bremmen Parts - Corporate Logo
ES#:
5445719
Mfg#:
125DBCON
Special Order: No Guaranteed ETA
ON SALE! SAVE 59%
$12.99

This product was last offered at the strikethrough price on
03-22-2026

$5.39 USD
This product is lifetime replacement eligible Lifetime Replacement

Front Oxygen Sensor - Priced Each

ES#2834598 - 1K0998262F - Front Oxygen Sensor - Priced Each - Keep your engine running efficiently - NTK - Audi Volkswagen

Keep your engine running efficiently Fits left and right position

Brand:
NTK - Corporate Logo
ES#:
2834598
Mfg#:
1K0998262F
Back Ordered
$182.99

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

$177.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Crankcase Breather Gasket

ES#11826 - 078103547f - Crankcase Breather Gasket - Seals the crankcase breather to the engine block - Original Equipment Supplier - Audi

Seals the crankcase breather to the engine block

Brand:
Original Equipment Supplier - Corporate Logo
ES#:
11826
Mfg#:
078103547F
Back Ordered
6% off MSRP

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

$48.99

This product was last offered at the strikethrough price on
07-21-2026

$45.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Vacuum Check Valve

ES#2878682 - 078611933B - Vacuum Check Valve - Multiple line check valve that sits in the back of the intake manifold - Vaico - Audi

Multiple line check valve that sits in the back of the intake manifold We Price Match - Give Us A Call or Chat!
Automatic Transmission Vehicles - Up To VIN 8D-1-053000, Split is in the 2001 model year - Manual Transmission Vehicles - Works on all model years

Brand:
Vaico - Corporate Logo
ES#:
2878682
Mfg#:
078611933B
Special Order: No Guaranteed ETA
$16.99 USD
Free Shipping
on orders $49 and up

Breather Tube

Connects to both valve covers to the PCV adapter vent tube

Brand:
VNE - Corporate Logo
ES#:
4707809
Mfg#:
06E103217AD
Back Ordered
$115.99

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

$111.99 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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