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Audi B5 A4 Quattro 1.8T

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Audi B5 A4 Quattro 1.8T Engine Fuel Parts

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Union Nut

ES#331120 - 321201375A - Union Nut - Secures the fuel pump assembly down to the fuel tank - Genuine Volkswagen Audi - Audi Volkswagen

Secures the fuel pump assembly down to the fuel tank Up to VIN 8D-W-070000, split is in the 1998 model year

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
331120
Mfg#:
321201375A
Ships in 3 Business Days
7% off MSRP

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

$13.99

This product was last offered at the strikethrough price on
08-24-2026

$12.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Motorvac Direct Injection Induction System Cleaner

ES#3245877 - MVC4002425 - Motorvac Direct Injection Induction System Cleaner - Great for use with the ES3245872 MotorVac cleaner tool. Used to blast carbon out of intake and valves. - MotorVac - Audi BMW Volkswagen Mercedes Benz MINI Porsche

Great for use with the ES3245872 MotorVac cleaner tool. Used to blast carbon out of intake and valves.

Brand:
MotorVac
ES#:
3245877
Mfg#:
MVC4002425
Ships on Nov 18, 2026
$47.99 USD
Free Shipping
on orders $49 and up

Fuel Pump Relay - 372

ES#2899179 - 4D0951253 - Fuel Pump Relay - 372 - Keep the fuel pump going - Vemo - Audi Volkswagen

Keep the fuel pump going

Brand:
Vemo - Corporate Logo
ES#:
2899179
Mfg#:
4D0951253
Special Order: No Guaranteed ETA
$91.99 USD
Free Shipping
on orders $49 and up

Black Market Parts Universal Fuel Pump Wiring Kit

ES#4883129 - 601-0054 - Black Market Parts Universal Fuel Pump Wiring Kit - A one-stop shop solution for anyone looking to add an additional fuel pump to their fuel tank - Precision Raceworks - Audi BMW Volkswagen Mercedes Benz MINI Porsche

A one-stop shop solution for anyone looking to add an additional fuel pump to their fuel tank

Brand:
Precision Raceworks - Corporate Logo
ES#:
4883129
Mfg#:
601-0054
Ships in 6 Business Days
$14.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Fuel Injector Installation Kit

ES#2586592 - 06B133555HKT1 - Fuel Injector Installation Kit - Includes everything required to replace the fuel injectors - Assembled By ECS - Audi

Includes everything required to replace the fuel injectors 10X Entries Into Our F80 M3 Sweepstakes
Engine code AWM

Brand:
Assembled By ECS - Corporate Logo
ES#:
2586592
Mfg#:
06B133555HKT1
Ships on Dec 4, 2026
Auto Notify
ON SALE! SAVE 10%
$87.99

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

$79.09 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

FP34 Surge Tank Hardware Kit - Nipple Connections

ES#3419781 - 034-106-Z024 - FP34 Surge Tank Hardware Kit - Nipple Connections - Allows for connections to factory style nipple connections for 5/16" or 8mm hose - 034Motorsport - Audi Volkswagen

Allows for connections to factory style nipple connections for 5/16" or 8mm hose 2X Entries Into Our F80 M3 Sweepstakes

Brand:
034Motorsport - Corporate Logo
ES#:
3419781
Mfg#:
034-106-Z024
Ships in 3 Business Days
ON SALE! SAVE 14%
$91.00

This product was last offered at the strikethrough price on
08-17-2026

$77.81 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Gravity Valve

ES#429535 - 8D0201751A - Gravity Valve - Located on the fuel tank filler neck - Genuine Volkswagen Audi - Audi Volkswagen

Located on the fuel tank filler neck Up to VIN 8D-W-007799, split is in the 1998 model year

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
429535
Mfg#:
8D0201751A
Ships in 9 Business Days
9% off MSRP

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

$80.99

This product was last offered at the strikethrough price on
08-24-2026

$73.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Boost Switch

ES#2826277 - 81014 - Boost Switch - Adjustable (1-15 PSI) to engage at the appropriate amount of boost pressure for your application. - SnowPerformance - Audi BMW Volkswagen MINI Porsche

Adjustable (1-15 PSI) to engage at the appropriate amount of boost pressure for your application.

Brand:
SnowPerformance - Corporate Logo
ES#:
2826277
Mfg#:
81014
In Stock at Vendor
$36.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

In-Line Micro Regulator - 5 Bar

ES#4690245 - 601-0260 - In-Line Micro Regulator - 5 Bar - The worlds smallest universal regulator! Comes pre-set within precision tolerance to eliminate guesswork setting target pressure! - Precision Raceworks - Audi BMW Volkswagen

The worlds smallest universal regulator! Comes pre-set within precision tolerance to eliminate guesswork setting target pressure!

Brand:
Precision Raceworks - Corporate Logo
ES#:
4690245
Mfg#:
601-0260
Ships in 5 Business Days
$64.99 USD
Free Shipping
on orders $49 and up

In-Line Micro Regulator - 6 Bar

ES#4690254 - 601-0261 - In-Line Micro Regulator - 6 Bar - The worlds smallest universal regulator! Comes pre-set within precision tolerance to eliminate guesswork setting target pressure! - Precision Raceworks - Audi BMW Volkswagen

The worlds smallest universal regulator! Comes pre-set within precision tolerance to eliminate guesswork setting target pressure!

Brand:
Precision Raceworks - Corporate Logo
ES#:
4690254
Mfg#:
601-0261
Ships in 10 Business Days
$64.99 USD
Free Shipping
on orders $49 and up

Fuel Injector O-Ring - Priced Each

ES#279757 - 06A906149A - Fuel Injector O-Ring - Priced Each - Keep your fueling system leak free - Genuine Volkswagen Audi - Audi Volkswagen

Keep your fueling system leak free Fits the lower position

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
279757
Mfg#:
06A906149A
In Stock
ON SALE!
$13.99

This product was last offered at the strikethrough price on
08-23-2026

$12.94 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Water/Methanol Injection Hose - 20'

ES#4715254 - BMS-WMI-IL - Water/Methanol Injection Hose - 20' - Replacement WMI Water Injection Hose - Burger Motorsports - Audi BMW Volkswagen MINI

Replacement WMI Water Injection Hose

Brand:
Burger Motorsports - Corporate Logo
ES#:
4715254
Mfg#:
BMS-WMI-IL
In Stock
$31.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

More About Engine Fuel Parts

ECS Tuning has made it simple to find the perfect fuel system parts for your car. Whether you're replacing OEM fuel system parts or building a high-flow fuel system for a performance car, ECS Tuning has fuel pumps, fuel injectors, fuel filters, and more from respected names like Bosch, Siemens, and Genesis.

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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