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 S4 Differential Parts

Sort By
Filter By
Return to Top

Rear Differential Service Kit

ES#2678603 - N10037106KT3 - Rear Differential Service Kit - Complete kit with Genuine Audi 75w90 fluid to service your rear differential - Genuine Volkswagen Audi - Audi

Complete kit with Genuine Audi 75w90 fluid to service your rear differential

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
2678603
Mfg#:
N10037106KT3
Ships in 2 Business Days
$216.99

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

$215.99 USD
Free Shipping
This product is lifetime replacement eligible Partial Replacement

Driveshaft Flange Seal

ES#2803722 - 018409399B - Driveshaft Flange Seal - Seals the propeller shaft flange to the transmission differential - Rein - Audi Volkswagen

Seals the propeller shaft flange to the transmission differential 2X Entries Into Our F80 M3 Sweepstakes
We Price Match - Give Us A Call or Chat!
Automatic transmission vehicles only

Brand:
Rein - Corporate Logo
ES#:
2803722
Mfg#:
018409399B
In Stock
$12.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Rear Differential Service Kit - With ECS Magnetic Drain/Fill Plugs

ES#2593489 - 0AR409399BKT1 - Rear Differential Service Kit - With ECS Magnetic Drain/Fill Plugs - Complete kit with Redline 75w90 GL-5 fluid to service your rear differential - Assembled By ECS - Audi

Complete kit with Redline 75w90 GL-5 fluid to service your rear differential 10X Entries Into Our F80 M3 Sweepstakes
For vehicles without Torque Vectoring differentials

Brand:
Assembled By ECS - Corporate Logo
ES#:
2593489
Mfg#:
0AR409399BKT1
Ships on Nov 12, 2026
ON SALE! SAVE 22%
$128.65

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

$100.46 USD
Free Shipping
This product is lifetime replacement eligible Partial Replacement

Driveshaft Flange Seal

ES#2622569 - 857525275 - Driveshaft Flange Seal - Seals the propeller shaft flange to the rear differential - Original Equipment Supplier - Audi Volkswagen

Seals the propeller shaft flange to the rear differential

Brand:
Original Equipment Supplier - Corporate Logo
ES#:
2622569
Mfg#:
857525275
Ships in 1-2 days
$186.99

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

$180.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Axle Flange Seal - Priced Each

ES#266849 - 016409399B - Axle Flange Seal - Priced Each - Fits the left and right side - Genuine Volkswagen Audi - Audi Volkswagen

Fits the left and right side

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
266849
Mfg#:
016409399B
Ships in 4 Business Days
6% off MSRP

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

$61.99

This product was last offered at the strikethrough price on
10-20-2026

$57.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Axle Flange Seal - Right

ES#2622454 - 01V409399 - Axle Flange Seal - Right - Seals the connection between the axle flange and transmission - ZF - Audi Volkswagen

Seals the connection between the axle flange and transmission We Price Match - Give Us A Call or Chat!

Brand:
ZF - Corporate Logo
ES#:
2622454
Mfg#:
01V409399
Ships in 1 Business Day
$43.02 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Rear Differential Lower Mount Bushing Insert - Street

ES#4869768 - PFR3-741 - Rear Differential Lower Mount Bushing Insert - Street - This is an insert to fit into the original bushing to minimize the movement of the diff under acceleration. - Powerflex - Audi

This is an insert to fit into the original bushing to minimize the movement of the diff under acceleration. From production date 4/28/2009

Brand:
Powerflex - Corporate Logo
ES#:
4869768
Mfg#:
PFR3-741
Ships in 1 Business Day
$55.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Driveshaft Flange Seal

ES#3569205 - 857525275 - Driveshaft Flange Seal - Seals the propeller shaft flange to the rear differential - Elring - Audi Volkswagen

Seals the propeller shaft flange to the rear differential 2X Entries Into Our F80 M3 Sweepstakes
We Price Match - Give Us A Call or Chat!

Brand:
Elring - Corporate Logo
ES#:
3569205
Mfg#:
857525275
In Stock
$16.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Rear Differential Cross Member Bushings - Priced Each

ES#437306 - 8E0599257K - Rear Differential Cross Member Bushings - Priced Each - Fits the left and right side - Genuine Volkswagen Audi - Audi

Fits the left and right side

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
437306
Mfg#:
8E0599257K
Ships in 1 day
12% off MSRP

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

$51.99

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

$45.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Propeller Shaft Gasket

ES#3287255 - 95B521142 - Propeller Shaft Gasket - Located between the driveshaft and the front & rear differentials - Genuine Porsche - Audi Porsche

Located between the driveshaft and the front & rear differentials

Brand:
Genuine Porsche - Corporate Logo
ES#:
3287255
Mfg#:
95B521142
Ships in 2 Business Days
$45.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Tapered Roller Bearing

ES#267217 - 01E409123 - Tapered Roller Bearing - Keep your differential free from noise - Genuine Volkswagen Audi - Audi

Keep your differential free from noise Fits right side only

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
267217
Mfg#:
01E409123
Ships in 10 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.

$148.99

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

$132.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Allen Bolt - Priced Each

ES#260073 - N0147236 - Allen Bolt - Priced Each - Install new hardware with your new parts. M10x30 - Genuine Volkswagen Audi - Audi Volkswagen

Install new hardware with your new parts. M10x30 Secures the input flange shaft housing to the differential

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
260073
Mfg#:
N0147236
Ships in 1 day
$5.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Driveshaft Flange Seal

ES#423940 - 857525275 - Driveshaft Flange Seal - Seals the propeller shaft flange to the rear differential - Genuine Volkswagen Audi - Audi Volkswagen

Seals the propeller shaft flange to the rear differential

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
423940
Mfg#:
857525275
Ships in 1 day
11% off MSRP

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

$139.99

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

$124.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Tapered Roller Bearing - Left

ES#2670928 - 0B4409123E - Tapered Roller Bearing - Left - Keep your differential free from noise - Genuine Volkswagen Audi - Audi

Keep your differential free from noise Manual transmission up to the 2012 model year

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
2670928
Mfg#:
0B4409123E
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.

$139.99

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

$123.99 USD
Free Shipping
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.

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 Your Privacy Choices Cookie Policy ECS Tuning is part of Enthusiast Auto Holdings