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Audi B8/B8.5 S4 Quattro 3.0T

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Audi B8/B8.5 S4 Quattro 3.0T Engine Electrical Parts

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High Pressure Fuel Pump O-Ring

ES#4342380 - 03C127311 - High Pressure Fuel Pump O-Ring - Seals the high pressure fuel pump to the cylinder head - Febi - Audi Volkswagen

Seals the high pressure fuel pump to the cylinder head We Price Match - Give Us A Call or Chat!

Brand:
Febi - Corporate Logo
ES#:
4342380
Mfg#:
03C127311
Ships on Sep 18, 2026
Auto Notify
$7.99

This product was last offered at the strikethrough price on
03-23-2026

$4.45 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Iridium Spark Plug

ES#4476254 - 101905631G - Iridium Spark Plug - 2X longer service life compared to standard copper plugs! - Denso - Audi

2X longer service life compared to standard copper plugs!

Brand:
Denso - Corporate Logo
ES#:
4476254
Mfg#:
101905631G
Ships in 1 Business Day
$12.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

A/C Pressure Switch

ES#4575869 - 9A7959126A - A/C Pressure Switch - Also use (Qty.) (1) 7H0 820 896 o-ring. - Genuine Porsche - Audi

Also use (Qty.) (1) 7H0 820 896 o-ring.

Brand:
Genuine Porsche - Corporate Logo
ES#:
4575869
Mfg#:
9A7959126A
Ships in 4 Business Days
$151.99

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

$150.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

MAP Sensor - Priced Each

ES#4708090 - 038906051J - MAP Sensor - Priced Each - Manifold absolute pressure sensor - Bremmen Parts - Audi

Manifold absolute pressure sensor
Located on the front left & right of the supercharger

Brand:
Bremmen Parts - Corporate Logo
ES#:
4708090
Mfg#:
038906051J
In Stock
ON SALE! SAVE 22%
$31.99

This product was last offered at the strikethrough price on
08-03-2026

$24.99 USD
Free Shipping
on orders $49 and up

Electrical Connector Kit - Housing With Pins & Wire Seals (3)

ES#4460527 - 8E0973703B-KIT - Electrical Connector Kit - Housing With Pins & Wire Seals (3) - Includes connector housing with terminals and seals. Great for an OE replacement or custom upgrades. - ECS - Audi Volkswagen

Includes connector housing with terminals and seals. Great for an OE replacement or custom upgrades. Please reference original part number from existing connector to confirm fitment, prior to ordering. *OEM

Brand:
ECS - Corporate Logo
ES#:
4460527
Mfg#:
8E0973703B-KIT
In Stock
ON SALE! SAVE 86%
$25.99

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

$3.53 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

CTEK Storage Bag

ES#4492955 - 40-468 - CTEK Storage Bag - The CTEK storage bag is tough, durable, and lightweight to protect your battery tender and keep it safe from the elements wherever you take it. - CTEK - Audi BMW Volkswagen Mercedes Benz MINI Porsche

The CTEK storage bag is tough, durable, and lightweight to protect your battery tender and keep it safe from the elements – wherever you take it.

Brand:
CTEK - Corporate Logo
ES#:
4492955
Mfg#:
40-468
In Stock
Limited Qty Sale
$87.99

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

$72.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

A/C Pressure Switch

ES#4057423 - 4H0959126B - A/C Pressure Switch - Prevents excess pressure from building within the system - Four Seasons - Audi

Prevents excess pressure from building within the system

Brand:
Four Seasons - Corporate Logo
ES#:
4057423
Mfg#:
4H0959126B
In Stock
ON SALE! SAVE 11%
$76.99

This product was last offered at the strikethrough price on
04-21-2026

$68.39 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

6-pin connector - priced each

ES#1925305 - 4H0973713 - 6-pin connector - priced each - Replace a broken connector to restore function - Genuine Volkswagen Audi - Audi

Replace a broken connector to restore function

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
1925305
Mfg#:
4H0973713
Ships in 2 Business Days
8% off MSRP

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

$12.99

This product was last offered at the strikethrough price on
08-22-2026

$11.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Reusable Cable Tie - Priced Each

ES#433117 - 8D0971850C - Reusable Cable Tie - Priced Each - Used in various locations in your vehicle - Genuine Volkswagen Audi - Audi

Used in various locations in your vehicle

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
433117
Mfg#:
8D0971850C
In Stock
$6.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Rear Oxygen Sensor - Priced Each

ES#4135682 - 06E906265Q - Rear Oxygen Sensor - Priced Each - Keep your engine running efficiently - Denso - Audi

Keep your engine running efficiently Fits the left and right position

Brand:
Denso - Corporate Logo
ES#:
4135682
Mfg#:
06E906265Q
Ships in 1 Business Day
$154.99

This product was last offered at the strikethrough price on
03-16-2026

$137.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

CTS Turbo B5 S4 MAF Housing 85mm (HITACHI)

ES#2862954 - CTSHW040 - CTS Turbo B5 S4 MAF Housing 85mm (HITACHI) - Designed for cars running RS4 or larger turbochargers with upgraded software, and upgraded fuel injectors. - CTS - Audi

Designed for cars running RS4 or larger turbochargers with upgraded software, and upgraded fuel injectors.

Brand:
CTS - Corporate Logo
ES#:
2862954
Mfg#:
CTSHW040
Ships in 7 Business Days
$129.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

THINKCAR CJS101 Compact Battery Analyzer

An all-in-one battery starter, DTC code reader, and alternator analyzer.

Brand:
THINKCAR - Corporate Logo
ES#:
4745613
Mfg#:
3.03.06.0001
Ships in 1 Business Day
$129.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

N205 Valve - Priced Each

ES#5444992 - 06E109257AC - N205 Valve - Priced Each - Valve that controls cam adjustment (Camshaft solenoid adjuster) - Bremmen Parts - Audi Volkswagen

Valve that controls cam adjustment (Camshaft solenoid adjuster)

Brand:
Bremmen Parts - Corporate Logo
ES#:
5444992
Mfg#:
06E109257AC
In Stock
ON SALE! SAVE 20%
$79.99

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

$63.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Fuel Pump Seal

ES#4039425 - 4F0919133B - Fuel Pump Seal - Located between the union nut and the plastic ring - Vaico - Audi

Located between the union nut and the plastic ring We Price Match - Give Us A Call or Chat!

Brand:
Vaico - Corporate Logo
ES#:
4039425
Mfg#:
4F0919133B
Ships in 2 Business Days
$32.99

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

$31.99 USD
Free Shipping
on orders $49 and up

CTEK Battery Tester

Easy to use — simply attach to the battery (no need to disconnect) and follow the on-screen instructions

Brand:
CTEK - Corporate Logo
ES#:
4492954
Mfg#:
56-925
Back Ordered
$126.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

More About Engine Electrical Parts

With automotive electrical content growing yearly, it has never been more important to keep your charging and electrical system in top working condition. ECS Tuning stocks a huge and constantly growing inventory of electrical sensors, electric motors, and electronic actuators from original equipment and name-brand aftermarket suppliers.

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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