Shop Our Clearance Sale - Up To 80% Off FREE SHIPPING on Orders $49+ *exclusions apply

Menu

Call Us330-331-2003 ChatLive Chat Text Us!
0 Shopping Cart
Your Vehicle

No Vehicle selected
Please select your vehicle below.

    • Audi
    • BMW
    • Mercedes Benz
    • MINI
    • Porsche
    • Volkswagen

Saved Vehicles

My Vehicles
You currently have no stored vehicles.

Recent Vehicles

Recent Vehicles Manage Vehicles

You currently have no recent vehicles.

We'll automatically keep fully selected vehicles here for your convenience.

Call Us330-331-2003 ChatLive Chat Text Us!
Track My Order View Order History Submit a Return Contact Us Wholesale Information Lifetime Replacement Returns and Warranty Information
0
Call Us330-331-2003 ChatLive Chat Text Us!
Track My Order View Order History Submit a Return Contact Us Wholesale Information Lifetime Replacement Returns and Warranty Information
Cancel
0
Sales & Specials
Enter Your Vehicle
garage-red
Your Vehicle Please tap 'Select' to pick a vehicle
Your Vehicle Please tap 'Select' to pick a vehicle
Select

Audi Differential Parts

Sort By
Filter By
Return to Top

Build-Your-Own Haldex Service Kit

ES#4173313 - BY0HALDEXGEN5 - Build-Your-Own Haldex Service Kit - Whether you're changing your fluid or replacing your pump, this kit can be configured to suit your needs! - Assembled By ECS - Audi Volkswagen

Whether you're changing your fluid or replacing your pump, this kit can be configured to suit your needs! 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
Assembled By ECS - Corporate Logo
ES#:
4173313
Mfg#:
BY0HALDEXGEN5
In Stock at Vendor
ON SALE!
Starting at $39.99 USD
Customize
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Partial Replacement

Gear Oil - 1 Liter

ES#465418 - G055145A2 - Gear Oil - 1 Liter - Keep your gears quiet and smooth with new fluid - Genuine Volkswagen Audi - Audi

Keep your gears quiet and smooth with new fluid For the transmission transfer box

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
465418
Mfg#:
G055145A2
In Stock
$135.99 USD
Free Shipping

Magnetic Drain/Fill Plug - Priced Each

ES#2538104 - 000857ECS01A - Magnetic Drain/Fill Plug - Priced Each - Capture harmful particles to prevent wear. M22x1.5 - ECS - Audi Volkswagen Porsche

Capture harmful particles to prevent wear. M22x1.5 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
ECS - Corporate Logo
ES#:
2538104
Mfg#:
000857ECS01A
Ships on Oct 21, 2026
Auto Notify
$40.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Drivetrain Mounts Insert Package

ES#2975804 - 034-509-6000 - Drivetrain Mounts Insert Package - Complete mount insert set - 034Motorsport - Audi

Complete mount insert set

Brand:
034Motorsport - Corporate Logo
ES#:
2975804
Mfg#:
034-509-6000
In Stock
$294.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

75W-85 Differential Oil - 1 Liter

ES#4758817 - G052190A2 - 75W-85 Differential Oil - 1 Liter - One (1) Liter Bottle - MB 235.7 / MB 239.7 Spec - Fuchs - Audi Mercedes Benz

One (1) Liter Bottle - MB 235.7 / MB 239.7 Spec

Brand:
Fuchs - Corporate Logo
ES#:
4758817
Mfg#:
G052190A2
Back Ordered
45% off MSRP

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

$59.00

This product was last offered at the strikethrough price on
07-22-2026

$32.46 USD
Free Shipping
on orders $49 and up

Build Your Own Rear Differential Service Kit

Service kit for your rear differential. One liter of Synthetic Gear Oil 75w90 and drain/fill plugs 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
Assembled By ECS - Corporate Logo
ES#:
4414611
Mfg#:
317011KT2
In Stock
ON SALE!
Starting at $20.77 USD
Customize
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Partial Replacement

Performance Rear Differential Mount - Audi B5 A4/S4

ES#2730494 - 003248ECS01A - Performance Rear Differential Mount - Audi B5 A4/S4 - Increase drivetrain rigidity and response! - ECS - Audi

Increase drivetrain rigidity and response! 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
ECS - Corporate Logo
ES#:
2730494
Mfg#:
003248ECS01A
In Stock
ON SALE! SAVE 25%
$243.99

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

$182.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Rear Bushing Differential Mount Insert Kit

ES#2992520 - 008288ECS02 - Rear Bushing Differential Mount Insert Kit - Decrease differential slop for better drivetrain response! - ECS - Audi Porsche

Decrease differential slop for better drivetrain response! 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
ECS - Corporate Logo
ES#:
2992520
Mfg#:
008288ECS02
In Stock
ON SALE! SAVE 25%
$115.99

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

$86.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Front Position Rear Differential Mount Insert Kit

ES#2992519 - 008288ECS01 - Front Position Rear Differential Mount Insert Kit - Decrease differential slop for better drivetrain response! - ECS - Audi Porsche

Decrease differential slop for better drivetrain response! 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
ECS - Corporate Logo
ES#:
2992519
Mfg#:
008288ECS01
In Stock
ON SALE! SAVE 25%
$95.99

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

$71.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

TTRS / RS3 Rear Final Drive Differential Assembly

ES#3707176 - 0CR525010S - TTRS / RS3 Rear Final Drive Differential Assembly - Connecting Drive Shaft to Axle Shafts that allows for varied speeds of wheel rotation. - Genuine Volkswagen Audi - Audi

Connecting Drive Shaft to Axle Shafts that allows for varied speeds of wheel rotation. For vehicles with axle code ULN from 06/17/2019

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
3707176
Mfg#:
0CR525010S
Ships in 7 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.

$7807.14

This product was last offered at the strikethrough price on
07-22-2026

$6979.58 USD

Rear Differential Service Kit

ES#4620204 - G055515A2KT - Rear Differential Service Kit - Complete kit with Genuine fluids and magnetic drain plugs to service your rear differential. - Assembled By ECS - Audi

Complete kit with Genuine fluids and magnetic drain plugs to service your rear differential. 10X Entries For Our 25th Anniversary Sweepstakes!
For vehicles with sport diff

Brand:
Assembled By ECS - Corporate Logo
ES#:
4620204
Mfg#:
G055515A2KT
Ships on Aug 7, 2026
Auto Notify
ON SALE!
$227.99

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

$208.94 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Partial Replacement

Billet Aluminum Rear Differential Mount Insert Kit

ES#3509529 - 034-505-2020 - Billet Aluminum Rear Differential Mount Insert Kit - Limits movement of factory rear diff mounts, increasing drivetrain rigidity and response! - 034Motorsport - Audi

Limits movement of factory rear diff mounts, increasing drivetrain rigidity and response!

Brand:
034Motorsport - Corporate Logo
ES#:
3509529
Mfg#:
034-505-2020
In Stock
$154.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

B8/C7 Center Differential Delete - NO WELDING NEEDED

ES#4375353 - 012535LA01 - B8/C7 Center Differential Delete - NO WELDING NEEDED - Easily allows the removal of center differential when converting your B8 S4 to RWD (rear wheel drive) from Quattro - ECS - Audi

Easily allows the removal of center differential when converting your B8 S4 to RWD (rear wheel drive) from Quattro 10X Entries For Our 25th Anniversary Sweepstakes!
100% reversible RWD kit when paired with our Axle Delete Plugs (ES4373491) Please make sure via VIN that

Brand:
ECS - Corporate Logo
ES#:
4375353
Mfg#:
012535LA01
Ships on Aug 11, 2026
Auto Notify
ON SALE! SAVE 20%
$452.99

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

$362.39 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Stainless Steel Magnetic Drain/Fill Plug - Priced Each

ES#2992215 - 010974ECS01 - Stainless Steel Magnetic Drain/Fill Plug - Priced Each - Capture harmful particles to prevent wear. M10x1x10 - ECS - Audi Volkswagen

Capture harmful particles to prevent wear. M10x1x10 10X Entries For Our 25th Anniversary Sweepstakes!

For vehicles with Torque Vectoring rear differentials

Brand:
ECS - Corporate Logo
ES#:
2992215
Mfg#:
010974ECS01
In Stock
ON SALE! SAVE 25%
$35.99

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

$26.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

More About Differential Parts

Stock or limited-slip, we stock bearings, repair parts, complete differential units, and approved differential fluids so you can keep sending power to the axles without noise, harshness, or vibration.

Other Audi Differential Parts

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.

Terms of Use Privacy Policy ECS Tuning is part of Enthusiast Auto Holdings