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 Clear

Audi B9 A4 Quattro 2.0T

    • 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 Audi B9 A4 Quattro 2.0T
Your Vehicle Audi B9 A4 Quattro 2.0T
Change Clear

Audi B9 A4 Quattro 2.0T Differential Parts

Sort By
Filter By
Return to Top

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! 2X Entries Into Our F80 M3 Sweepstakes

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

Drain/Fill Plug - Priced Each

ES#469442 - N90281802 - Drain/Fill Plug - Priced Each - Commonly found as a drain or fill plug. M10x1x10 - Genuine Volkswagen Audi - Audi Volkswagen

Commonly found as a drain or fill plug. M10x1x10

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
469442
Mfg#:
N90281802
In Stock
$3.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Rear Differential Service Kit

ES#4620706 - G055190A2-2KT - Rear Differential Service Kit - Complete kit with Genuine fluids and drain plugs to service your rear differential - Genuine Volkswagen Audi - Audi

Complete kit with Genuine fluids and drain plugs to service your rear differential

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
4620706
Mfg#:
G055190A2-2KT
In Stock
$59.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Partial Replacement

Complete Drivetrain Mount Insert Kit

ES#3194637 - 019208ecs01KT1 - Complete Drivetrain Mount Insert Kit - Decrease slop and increase drivetrain rigidity and response! - ECS - Audi

Decrease slop and increase drivetrain rigidity and response! 10X Entries Into Our F80 M3 Sweepstakes

Does not fit manual transmission models

Brand:
ECS - Corporate Logo
ES#:
3194637
Mfg#:
019208ECS01KT1
In Stock
ON SALE! SAVE 10%
$242.99

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

$218.69 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Genuine Quattro Ultra Service Kit

ES#5445322 - G055515A2KT3 - Genuine Quattro Ultra Service Kit - Includes Genuine Fluid and Two (2) Drain/Fill Plugs - Genuine Volkswagen Audi - Audi

Includes Genuine Fluid and Two (2) Drain/Fill Plugs

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
5445322
Mfg#:
G055515A2KT3
Ships in 8 Business Days
$45.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Partial Replacement

Rear Differential Mount Bushing Insert Kit

ES#3161730 - 019208ecs01KT - Rear Differential Mount Bushing Insert Kit - Decrease differential bushing deflection for better drivetrain response! - ECS - Audi

Decrease differential bushing deflection for better drivetrain response! 10X Entries Into Our F80 M3 Sweepstakes

Brand:
ECS - Corporate Logo
ES#:
3161730
Mfg#:
019208ECS01KT
In Stock
ON SALE!
$129.99

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

$126.09 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

AWD Four-Wheel Coupling / Clutch Assembly

ES#4657061 - 0CJ409431G001 - AWD Four-Wheel Coupling / Clutch Assembly - Often referred to as the transfer case clutchis the critical component responsible for seamlessly managing torque delivery between the transmission and the driveline - Genuine Volkswagen Audi - Audi

Often referred to as the transfer case clutch—is the critical component responsible for seamlessly managing torque delivery between the transmission and the driveline

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
4657061
Mfg#:
0CJ409431G001
Ships in 1-2 days
4% off MSRP

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

$1748.99

This product was last offered at the strikethrough price on
10-23-2026

$1674.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Rear Differential Service Kit

ES#4620705 - G055190A2-1KT - 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 Into Our F80 M3 Sweepstakes

Brand:
Assembled By ECS - Corporate Logo
ES#:
4620705
Mfg#:
G055190A2-1KT
In Stock
$97.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Partial Replacement

Hex Low Profile Service Sockets

ES#4464389 - AGA-SS-8-14-K - Hex Low Profile Service Sockets - Due to minimal clearance, its difficult to get a hex socket in the gaps to remove plugs on rear differentials, transfer case and other engine drain/fill plugs. - AGA Tools - Audi BMW Volkswagen Mercedes Benz MINI Porsche

Due to minimal clearance, it’s difficult to get a hex socket in the gaps to remove plugs on rear differentials, transfer case and other engine drain/fill plugs.

Brand:
AGA Tools - Corporate Logo
ES#:
4464389
Mfg#:
AGA-SS-8-14-K
Ships in 7 Business Days
$169.00 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Rear Carrier Mount Bushing - Priced Each

ES#3150190 - 4M0599257R - Rear Carrier Mount Bushing - Priced Each - Fits left and right side - Genuine Volkswagen Audi - Audi

Fits left and right side

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
3150190
Mfg#:
4M0599257R
Ships in 1-2 days
12% off MSRP

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

$58.99

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

$51.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Quattro Ultra Service Kit

ES#5445320 - G055515A2KT1 - Quattro Ultra Service Kit - Includes Genuine Fluid and Two (2) Stainless Steel Magnetic Drain/Fill Plugs - Assembled By ECS - Audi

Includes Genuine Fluid and Two (2) Stainless Steel Magnetic Drain/Fill Plugs 10X Entries Into Our F80 M3 Sweepstakes

Brand:
Assembled By ECS - Corporate Logo
ES#:
5445320
Mfg#:
G055515A2KT1
Ships in 8 Business Days
ON SALE! SAVE 11%
$105.99

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

$94.32 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Partial Replacement

Quattro Ultra Service Kit

ES#5445321 - G055515A2KT2 - Quattro Ultra Service Kit - Includes Febi Fluid and Two (2) Drain/Fill Plugs - Assembled By ECS - Audi

Includes Febi Fluid and Two (2) Drain/Fill Plugs 10X Entries Into Our F80 M3 Sweepstakes

Brand:
Assembled By ECS - Corporate Logo
ES#:
5445321
Mfg#:
G055515A2KT2
In Stock
$68.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Partial Replacement

Rear Differential Bushing

ES#3087141 - 8W0599381B - Rear Differential Bushing - Front location bonded rubber mounting keeps the rear differential secure - Genuine Volkswagen Audi - Audi

Front location bonded rubber mounting keeps the rear differential secure

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
3087141
Mfg#:
8W0599381B
Ships in 1-2 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.

$52.99

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

$46.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

TGK Motorsport Rear Differential Bushing Insert Kit

ES#5477664 - TGK-0404-07 - TGK Motorsport Rear Differential Bushing Insert Kit - Lock down your Audi B9 or B9.5's drivetrain and eliminate rear-end slop during hard launches with this premium billet aluminum differential bushing insert kit. - TGK Motorsport - Audi

Lock down your Audi B9 or B9.5's drivetrain and eliminate rear-end slop during hard launches with this premium billet aluminum differential bushing insert kit.

Brand:
TGK Motorsport - Corporate Logo
ES#:
5477664
Mfg#:
TGK-0404-07
Ships in 5 Business Days
$149.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Rear Differential Carrier Bushing Insert Kit - Black

Enhance your driving experience by filling the bushing void.

Brand:
JH Motorsports - Corporate Logo
ES#:
4620267
Mfg#:
4M0599257R
Ships in 10 Business Days
$124.99 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.

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