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Audi B9 S4 Quattro 3.0T Engine Emission Parts

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ES#4493209 - MMBCC-S4-18PBE - Mishimoto Baffled Oil Catch - Kit - Help reduce potential detonation, carbon buildup on intake valves and protect from oil blow-by. - Mishimoto - Audi

Help reduce potential detonation, carbon buildup on intake valves and protect from oil blow-by.

Brand:
Mishimoto - Corporate Logo
ES#:
4493209
Mfg#:
MMBCC-S4-18PBE
Ships in 3 Business Days
$445.99

This product was last offered at the strikethrough price on
09-30-2026

$429.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement
ES#5516610 - TGK-0311-03 - PCV Breather Line Kit - Billet Fittings - Completely eliminates these vulnerabilities with precision-engineered components designed for sustained high-performance operation. - TGK Motorsport - Audi

Completely eliminates these vulnerabilities with precision-engineered components designed for sustained high-performance operation.

Brand:
TGK Motorsport - Corporate Logo
ES#:
5516610
Mfg#:
TGK-0311-03
Ships in 6 Business Days
$349.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Properly remove stubborn o2 sensors.

Brand:
Hazet - Corporate Logo
ES#:
4490396
Mfg#:
4680-1
Ships in 1 Business Day
$118.99

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

$115.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement
ES#3097721 - N1.50X051 - ECS Catch Can O-ring - Replacement ECS catch can O-ring - ECS - Audi BMW Volkswagen MINI

Replacement ECS catch can O-ring 10X Entries Into Our F80 M3 Sweepstakes

Brand:
ECS - Corporate Logo
ES#:
3097721
Mfg#:
N1.50X051
In Stock
ON SALE! SAVE 25%
$5.99

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

$4.49 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement
ES#3607764 - 8W0906265AJ - Oxygen Sensor - Rear - Keep your engine running efficiently - Genuine Volkswagen Audi - Audi

Keep your engine running efficiently

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
3607764
Mfg#:
8W0906265AJ
Ships in 1-2 days
13% off MSRP

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

$303.99

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

$262.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement
ES#5527079 - TGK-0311-04 - PCV Breather Line Kit - OE Plastic Fittings - Completely eliminates these vulnerabilities with precision-engineered components designed for sustained high-performance operation. - TGK Motorsport - Audi

Completely eliminates these vulnerabilities with precision-engineered components designed for sustained high-performance operation.

Brand:
TGK Motorsport - Corporate Logo
ES#:
5527079
Mfg#:
TGK-0311-04
Ships in 6 Business Days
$249.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement
ES#4851165 - PAB103495E - Oil Separator/Pressure Control Valve (PCV) - Also known as the "PCV". Located on the valve cover - Genuine Porsche - Audi Porsche

Also known as the "PCV". Located on the valve cover

Brand:
Genuine Porsche - Corporate Logo
ES#:
4851165
Mfg#:
PAB103495E
Ships in 4 Business Days
$211.99

This product was last offered at the strikethrough price on
08-04-2026

$209.99 USD
Free Shipping
on orders $49 and up
ES#4001163 - CTA2068 - Oxygen Sensor Thread Chaser - Remove rust and dirt for easy installation with this tool - CTA Tools - Audi BMW Volkswagen Mercedes Benz MINI Porsche

Remove rust and dirt for easy installation with this tool

Brand:
CTA Tools - Corporate Logo
ES#:
4001163
Mfg#:
CTA2068
In Stock
$11.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement
ES#4772520 - 06M103517B - PCV Gasket - Located between the oil separator and the valve cover - Elring - Audi

Located between the oil separator and the valve cover 2X Entries Into Our F80 M3 Sweepstakes
We Price Match - Give Us A Call or Chat!

Brand:
Elring - Corporate Logo
ES#:
4772520
Mfg#:
06M103517B
Ships in 1 Business Day
$30.99

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

$24.71 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement
ES#4428997 - 8W0201550J - RS5 Gas Cap - Fuel filler cap with Audi 'RS' logo - Includes retaining strap - Genuine Volkswagen Audi - Audi

Fuel filler cap with Audi 'RS' logo - Includes retaining strap

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
4428997
Mfg#:
8W0201550J
Ships on Nov 18, 2026
10% off MSRP

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

$69.99

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

$62.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement
ES#513618 - N10413405 - Hex Bolt - Priced Each - Install new hardware with your new parts. M6x25 - Genuine Volkswagen Audi - Audi Volkswagen

Install new hardware with your new parts. M6x25 For vehicles with production date from 12/07/2020 up to 01/24/2022

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
513618
Mfg#:
N10413405
Ships in 2 Business Days
11% off MSRP

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

$0.70

This product was last offered at the strikethrough price on
11-02-2026

$0.62 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement
ES#469749 - N90409501 - Hose Clamp - Priced Each - Install new clamps to stay leak free. 28.6x7x.6mm - Genuine Volkswagen Audi - Audi Volkswagen

Install new clamps to stay leak free. 28.6x7x.6mm

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
469749
Mfg#:
N90409501
In Stock
$0.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement
ES#2944218 - LIS12390 - Dual Drive Oxygen Sensor Wrench - Tool comes with both 1/2" and 3/8" drive. - Lisle - Audi BMW Volkswagen Mercedes Benz MINI Porsche

Tool comes with both 1/2" and 3/8" drive.

Brand:
Lisle - Corporate Logo
ES#:
2944218
Mfg#:
LIS12390
Ships in 6 Business Days
$59.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement
ES#2949705 - SLY88750B - Oxygen Sensor Wrench 3/8" drive - O2 Sensor Socket - Schley - Audi Volkswagen Mercedes Benz MINI

O2 Sensor Socket

Brand:
Schley - Corporate Logo
ES#:
2949705
Mfg#:
SLY88750B
Ships on Nov 18, 2026
$59.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement
ES#2944378 - LIS22850 - Hose Pinchers  - A must for any car enthusiast. - Lisle - Audi BMW Volkswagen Mercedes Benz MINI Porsche

A must for any car enthusiast.

Brand:
Lisle - Corporate Logo
ES#:
2944378
Mfg#:
LIS22850
In Stock at Vendor
$17.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement
ES#3543138 - 20-0024 - Universal Catch Can Drain Kit - Intuitive drain solution for most catch can applications - Radium Engineering - Audi BMW Volkswagen MINI Porsche

Intuitive drain solution for most catch can applications

Brand:
Radium Engineering - Corporate Logo
ES#:
3543138
Mfg#:
20-0024
In Stock at Vendor
$28.99 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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