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Audi B9 S4 Quattro 3.0T

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Audi B9 S4 Quattro 3.0T Engine Emission Parts

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Offset Oxygen Sensor Wrench- Extended

ES#4001169 - CTA2065 - Offset Oxygen Sensor Wrench- Extended - Extra length is needed sometimes - CTA Tools - Audi BMW Volkswagen Mercedes Benz MINI Porsche

Extra length is needed sometimes

Brand:
CTA Tools - Corporate Logo
ES#:
4001169
Mfg#:
CTA2065
Back Ordered
$19.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Universal Oxygen Sensor Bung - Priced Each

ES#5051 - ATP-FLS-022 - Universal Oxygen Sensor Bung - Priced Each - Stainless steel weld-in nut for any O2 sensor - ATP - Audi BMW Volkswagen

Stainless steel weld-in nut for any O2 sensor

Brand:
ATP - Corporate Logo
ES#:
5051
Mfg#:
ATP-FLS-022
Ships in 6 Business Days
$12.95 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Oil Separator/Pressure Control Valve (PCV)

Also known as the "PCV". Located on the valve cover 5X Entries Into Our F80 M3 Sweepstakes

Brand:
Hengst - Corporate Logo
ES#:
5527446
Mfg#:
06M103515T
Ships in 1 day
$117.99 USD
Free Shipping
on orders $49 and up

Catalytic Converter

Price includes a $275.00 refundable core charge

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
4220359
Mfg#:
8W0254252TXKT
Ships in 7 Business Days
$3702.99

This product was last offered at the strikethrough price on
10-26-2026

$3665.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Solenoid Valve - Priced Each

ES#5492271 - 037906283C - Solenoid Valve - Priced Each - Direct OE replacement 2-pin switch valve to cure vacuum leaks, SAI faults, or intake runner codes (commonly used as N112, N156, or N249 valves). - Febi - Audi Volkswagen

Direct OE replacement 2-pin switch valve to cure vacuum leaks, SAI faults, or intake runner codes (commonly used as N112, N156, or N249 valves). For vehicle with productions dates up to 07/30/2020

Brand:
Febi - Corporate Logo
ES#:
5492271
Mfg#:
037906283C
Special Order: No Guaranteed ETA
$36.99 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 Into Our F80 M3 Sweepstakes

Brand:
Bremmen Parts - Corporate Logo
ES#:
5445719
Mfg#:
125DBCON
Special Order: No Guaranteed ETA
ON SALE! SAVE 10%
$5.39 USD
This product is lifetime replacement eligible Lifetime Replacement

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

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.

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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