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Audi B7 S4 V8 Differential Parts

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Hightec TOPGEAR SAE 75W-90 S - 1 Liter

ES#5374135 - 25002-0010-99 - Hightec TOPGEAR SAE 75W-90 S - 1 Liter - Fully synthetic, multigrade gearbox oil of performance rating API GL-4/5 for multi-functional use in axle gears and manual gearboxes - ROWE - Audi BMW Volkswagen Mercedes Benz MINI Porsche

Fully synthetic, multigrade gearbox oil of performance rating API GL-4/5 for multi-functional use in axle gears and manual gearboxes affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
ROWE - Corporate Logo
ES#:
5374135
Mfg#:
25002-0010-99
In Stock
$15.99 USD
Free Shipping
on orders $49 and up

Tapered Roller Bearing - Priced Each

ES#1357033 - 01X409123 - Tapered Roller Bearing - Priced Each - Keep your differential free from noise - 50x80x20 - Genuine Porsche - Audi Porsche

Keep your differential free from noise - 50x80x20 affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Genuine Porsche - Corporate Logo
ES#:
1357033
Mfg#:
01X409123
Ships in 3 Business Days
$117.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Axle Flange Seal - Priced Each

ES#3464831 - 0AR409399B - Axle Flange Seal - Priced Each - Fits the left & right side - Corteco - Audi

Fits the left & right side affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Corteco - Corporate Logo
ES#:
3464831
Mfg#:
0AR409399B
In Stock
$12.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Rear Differential Mount

ES#2975894 - 8E0599125K - Rear Differential Mount - Used to secure the rear differential to the subframe - Hamburg Tech - Audi

Used to secure the rear differential to the subframe affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
We Price Match - Give Us A Call or Chat!

Brand:
Hamburg Tech - Corporate Logo
ES#:
2975894
Mfg#:
8E0599125K
Ships in 1 Business Day
$60.99 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 affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
437306
Mfg#:
8E0599257K
Ships in 1 day
10% 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
02-26-2026

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

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 affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
2678603
Mfg#:
N10037106KT3
Ships in 1 day
$212.99 USD
Free Shipping
This product is lifetime replacement eligible Partial Replacement

Rear Differential Mount

ES#437300 - 8E0599125K - Rear Differential Mount - Used to secure the rear differential to the subframe - Genuine Volkswagen Audi - Audi

Used to secure the rear differential to the subframe affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
437300
Mfg#:
8E0599125K
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.

$213.99

This product was last offered at the strikethrough price on
02-26-2026

$190.99 USD
Free Shipping
on orders $49 and up
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 affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
266849
Mfg#:
016409399B
Ships in 1 day
Limited Qty Sale
$57.99

This product was last offered at the strikethrough price on
02-26-2026

$50.99 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 Plug

ES#3677577 - g052145s2kt4KT - Rear Differential Service Kit - With ECS Magnetic Drain/Fill Plug - Complete kit with Genuine Audi 75w90 fluid to service your rear differential - Assembled By ECS - Audi

Complete kit with Genuine Audi 75w90 fluid to service your rear differential affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
Assembled By ECS - Corporate Logo
ES#:
3677577
Mfg#:
G052145S2KT4KT
Ships on Aug 14, 2026
Auto Notify
ON SALE! SAVE 10%
$158.99

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

$143.73 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Partial 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 affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Fits right side only

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
267217
Mfg#:
01E409123
Special Order: No Guaranteed ETA
9% 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
02-26-2026

$134.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Axle Flange Seal - Right

ES#288261 - 09E409399A - Axle Flange Seal - Right - Stop leaks from your differential - Genuine Volkswagen Audi - Audi

Stop leaks from your differential affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
288261
Mfg#:
09E409399A
In Stock at Vendor
5% off MSRP

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

$63.99

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

$60.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Driveshaft Flange Seal

ES#272823 - 02X409400A - Driveshaft Flange Seal - Seals the propeller shaft flange to the front differential - Genuine Volkswagen Audi - Audi

Seals the propeller shaft flange to the front differential affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
272823
Mfg#:
02X409400A
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.

$118.99

This product was last offered at the strikethrough price on
02-26-2026

$105.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Plug With Seal - Priced Each

ES#268084 - 01V409057 - Plug With Seal - Priced Each - Install new hardware when performing service. M18x1.5 - Genuine Volkswagen Audi - Audi Volkswagen

Install new hardware when performing service. M18x1.5 affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Automatic transmission vehicles only

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
268084
Mfg#:
01V409057
Ships in 1 day
15% off MSRP

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

$40.99

This product was last offered at the strikethrough price on
02-04-2026

$34.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

SEAL

ES#3640337 - 0AR525275A - SEAL - Genuine Volkswagen Audi - Audi

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
3640337
Mfg#:
0AR525275A
Ships in 1 day
13% off MSRP

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

$39.99

This product was last offered at the strikethrough price on
02-26-2026

$34.99 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 Plug

ES#2538236 - 016409399BKT - Rear Differential Service Kit - With ECS Magnetic Drain/Fill Plug - Complete kit with Motul Gear 300 fluid to service your rear differential - Assembled By ECS - Audi Volkswagen

Complete kit with Motul Gear 300 fluid to service your rear differential affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
Assembled By ECS - Corporate Logo
ES#:
2538236
Mfg#:
016409399BKT
Ships on Aug 14, 2026
Auto Notify
ON SALE! SAVE 14%
$110.99

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

$95.04 USD
Free Shipping
This product is lifetime replacement eligible Partial Replacement

Axle Flange Seal - Priced Each

ES#2622570 - 016409399B - Axle Flange Seal - Priced Each - Fits the left and right side - Rein - Audi Volkswagen

Fits the left and right side affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 2X Entries For Our 25th Anniversary Sweepstakes! 2X Entries For Our 25th Anniversary Sweepstakes! 2X Entries For Our 25th Anniversary Sweepstakes!
We Price Match - Give Us A Call or Chat!

Brand:
Rein - Corporate Logo
ES#:
2622570
Mfg#:
016409399B
Ships in 1 Business Day
$8.99

This product was last offered at the strikethrough price on
04-08-2026

$8.15 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.

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