1. Home
  2. Audi
  3. Differential

Audi S4 Differential Parts

Audi Front Differential Service Kit - Genuine Audi G065190A2KT
Available
In Stock
Ships Free
$188.47
Audi Front Differential Service Kit - Genuine Audi G052145S2KT
Available
In Stock
Ships Free
$137.97
Audi Differential Fluid Service Kit - Genuine Audi G055190A2KT

Audi Differential Fluid Service Kit - Genuine Audi G055190A2KT

For Models w/ Rear Sport Differential (Torque Vectoring)
S4, S5, S5 Sportback, RS5, RS5 Sportback, SQ5, SQ5 Sportback, & More
Genuine Audi
1 Rating
Available
In Stock
Ships Free
$102.14
Audi Differential Fluid Service Kit - Febi Bilstein 48785KT

Audi Differential Fluid Service Kit - Febi Bilstein 48785KT

For Models w/ Rear Sport Differential (Torque Vectoring)
S4, S5, S5 Sportback, RS5, RS5 Sportback, SQ5, SQ5 Sportback, & More
Febi Bilstein
Available
Ships in 1 business day
Ships Free
$79.96
Audi Differential Fluid Service Kit - Genuine Audi G055190A2KT2

Audi Differential Fluid Service Kit - Genuine Audi G055190A2KT2

For Models Without Rear Sport Differential
A6 Quattro, S4, S5, S5 Sportback, S6, Q7, & More
Genuine Audi
Available
In Stock
Ships Free
$59.09
OE
Audi VW Transmission Differential Bearing - SKF  113517185C

Audi VW Transmission Differential Bearing - SKF 113517185C

100, 100 Series, 200, 200 Quattro, 4000, & more
SKF
Available
In Stock
$33.65
OE
Audi Rear Differential Mount - Lemforder 8K0599381H

Audi Rear Differential Mount - Lemforder 8K0599381H

S5, A4 allroad, A5 Quattro, RS5, A4 Quattro, & more
Lemforder
Available
In Stock
$25.09
OE
Audi Differential Pinion Seal - Corteco 017525275B

Audi Differential Pinion Seal - Corteco 017525275B

100 Quattro, 200 Quattro, 5000 Quattro, & more
Corteco
Available
In Stock
$8.19
OEM
Audi VW Transmission Differential Bearing - FAG 113517185C

Audi VW Transmission Differential Bearing - FAG 113517185C

100, 100 Series, 200, 200 Quattro, 4000, & more
FAG
Available
Ships in 3 business days
$33.79
OEM
Audi VW Gear Oil Synthetic 75W90 - Febi-Bilstein G052145S2

Audi VW Gear Oil Synthetic 75W90 - Febi-Bilstein G052145S2

100, 100 Quattro, 100 Series, 200, 200 Quattro, & more
Febi Bilstein
Available
In Stock
$20.59
OEM
Audi VW Differential Pinion Seal - Elring 857525275

Audi VW Differential Pinion Seal - Elring 857525275

4000 Quattro, 80 Quattro, 90, 90 Quattro, & more
Elring
1 Rating
Available
In Stock
$14.69
Transfer Box Gear Oil - Febi Bilstein 170367

Transfer Box Gear Oil - Febi Bilstein 170367

S4, S5, S5 Sportback, RS5, RS5 Sportback, Golf R, & More
Febi Bilstein
Available
Ships in 1 business day
$36.39
Clearance
Audi Rear Differential Mount - Febi 39334

Audi Rear Differential Mount - Febi 39334

A6 Quattro, Allroad Quattro, Passat, RS6
Febi Bilstein
Available
In Stock
$35.72
Audi Porsche Carrier Bearing - Fag 99905902702

Audi Porsche Carrier Bearing - Fag 99905902702

914, 924, 928, 911, 930, & more
FAG
Available
Ships in 1 business day
$28.19
Audi VW Differential Pinion Seal - Febi 100277

Audi VW Differential Pinion Seal - Febi 100277

4000 Quattro, 80 Quattro, 90, 90 Quattro, & more
Febi Bilstein
Available
Ships in 2-3 weeks
$21.29
75W90 Fully Synthetic Hypoid Gear Oil (1 Liter) - Liqui Moly LM22090

75W90 Fully Synthetic Hypoid Gear Oil (1 Liter) - Liqui Moly LM22090

1 Liter
100 Quattro, 122, 128i, 135i, 135is, 142, 144, & more
Liqui Moly
75 Ratings
Available
In Stock
$19.86
75W90 Top Tec 5400 MTF (1 Liter) - Liqui Moly 22275

75W90 Top Tec 5400 MTF (1 Liter) - Liqui Moly 22275

100, 100 Quattro, 100 Series, 200, 200 Quattro, & more
Liqui Moly
Available
In Stock
$18.96
Porsche Audi VW Differential Bearing - SKF 016409123

Porsche Audi VW Differential Bearing - SKF 016409123

100 Quattro, 200, 200 Quattro, 4000 Quattro, & more
SKF
Available
Ships in 1 business day
$18.49
VW Mounting, axle bracket - Febi 177131

VW Mounting, axle bracket - Febi 177131

A6, RS4, S4, R8, S6, & more
Febi Bilstein
Available
Ships in 2-3 weeks
$16.99
Audi Differential Drive Pinion Oil Deflector Rear - Febi 31499

Audi Differential Drive Pinion Oil Deflector Rear - Febi 31499

A4 Quattro, A5 Quattro, A6 Quattro, A7 Quattro, & more
Febi Bilstein
Available
In Stock
$9.39
MAP
Audi Differential Carrier Mount - 034Motorsport 0345051000
Available
Ships in 2-3 weeks
$441.00
MAP
Audi Porsche Drivetrain Mount Insert Kit - 034Motorsport 0345096000

Audi Porsche Drivetrain Mount Insert Kit - 034Motorsport 0345096000

A4 Quattro, A5 Quattro, A8 Quattro, Macan, Q5, RS5, & more
034Motorsport
3 Ratings
Available
In Stock
$294.00
MAP
Audi Differential Carrier Mount Insert Kit - 034Motorsport 0345052016
Available
In Stock
$134.00
MAP
Audi Rear Differential Mount Insert - 034Motorsport 0345052019

Audi Rear Differential Mount Insert - 034Motorsport 0345052019

Billet Aluminum
A6 Quattro, Allroad Quattro, Passat, RS6
034Motorsport
Available
In Stock
$117.00
MAP
Audi Differential Mount Insert Kit - Powerflex PFR3-743B

Audi Differential Mount Insert Kit - Powerflex PFR3-743B

Black Series
A4 Quattro, A5 Quattro, A6 Quattro, A7 Quattro, & more
Powerflex
Available
Ships in 4 business days
Ships Free
$94.99

The differential is a device that usually consists of gears. These gears allow each of the driving wheels to rotate at different speeds, while supplying equal power to each of them.

About Audi S4

The Audi S4 dates back to 1991 with the C4 platform, it was originally a spin off performance version of the Audi 100 which is now known as an Audi A4. The B5 chassis S4 was based off of the A4 with a powerful 2.7 liter biturbo version S4 model released in the US for 2000 to 2002. Aside from the impressive performance the exterior and interior styling was also enhanced to further set it apart from a standard A4. The B5 Audi S4 has larger rims, aluminum look mirror caps, updated bumpers and the interior featured S4 specific seats with more substantial side bolstering.A third generation B6 Audi S4 was released in North America for 2004 on an all new platform with an entirely different engine. Even though the platform was new for the third generation the highlight of the S4 was the highly talked about naturally aspirated 4.2 liter V8 engine producing a stout 340 horsepower and 302 ft lbs of torque. This was enough power to get the luxury sedan up to 60 mph in the 5 second range. The B7 S4 was available half way through the 2005 model year with some cosmetic changes along with minor revisions made to the suspension. The Bose sound system was made standard on the B7 S4 instead of having it be an option like it was on the Audi B6 S4.The all new B8 Audi S4 quattro wasn’t available in the US until 2010, built on the VW Group MLB/MLP platform and based on the B8 A4 Quattro. This luxury sports car has a force induction 3.0 liter TFSI V6 engine with a roots style Eaton supercharger keeping power on tap with an advertised 333 hp. Many claim that the actual horsepower output is closer to 375 horsepower. This is enough power to propel the German luxury sedan to 60 in a sub 5 second range with a quarter mile run of high 12’s. One of the most notable performance features would be the optional rear sport differential which greatly improves weight balance in corners and overall driving dynamics. It almost makes the S4 feel like it has 4 wheel steering because of the power transfer.

FCP Euro is an online retailer specializing in replacement parts for European cars including Volvo, BMW, Saab, Audi, VW and Mercedes Benz. Since 1986 FCP has been focused on servicing it’s customer, providing the highest quality replacement parts at affordable prices, and making sure that it’s catalog is accurate to ensure that their replacement parts fit and perform exactly as original equipment.

FCP Euro offers one of the largest selections of Genuine & OEM replacement parts on the web backed with a lifetime warranty, unlimited returns, and free shipping.

© FCP Euro 2026. All rights reserved.  
Version: 94c708b2f : 53a503b7d08d6a1584b68d28b71f3ec1f789121f