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Audi B9 S4 Quattro 3.0T

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Audi B9 S4 Quattro 3.0T Rear Differential Parts

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Rear Differential Service Kit

ES#4620164 - g055190a2KT - 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#:
4620164
Mfg#:
G055190A2KT
Ships on Nov 4, 2026
$104.99 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! 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

Axle Oil - 1 Liter

ES#465421 - G055190A2 - Axle Oil - 1 Liter - Genuine Volkswagen Audi - Audi

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
465421
Mfg#:
G055190A2
In Stock
$52.49 USD
Free Shipping
on orders $49 and up

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 for vehicles without sport diff

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

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 Into Our F80 M3 Sweepstakes
For vehicles with sport diff

Brand:
Assembled By ECS - Corporate Logo
ES#:
4620204
Mfg#:
G055515A2KT
Ships on Nov 4, 2026
ON SALE!
$227.99

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

$211.90 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

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

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

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
for vehicles without sport diff

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

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 3 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.

$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

Drain/Fill Plug (22x1.5) - Priced Each

ES#2536706 - WHT005804 - Drain/Fill Plug (22x1.5) - Priced Each - Removed to drain or fill the fluid of your transmission - Genuine Volkswagen Audi - Audi

Removed to drain or fill the fluid of your transmission

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
2536706
Mfg#:
WHT005804
Ships in 1-2 days
13% off MSRP

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

$7.99

This product was last offered at the strikethrough price on
10-09-2026

$6.99 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

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Manufacturer names and/or part numbers are used only for identification purposes.

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