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Audi D3 A8 Quattro 4.2 Differential Parts

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Max-Gear Gear Oil 75w90 - 1 Quart

ES#263484 - 01300 - Max-Gear Gear Oil 75w90 - 1 Quart - Max-Gear is recommended for use in front or rear open differentials, manual transmissions, and lower gear units of marine engines that specify use of an API GL-5 or GL-4 fluid - Royal Purple - Audi BMW Volkswagen Mercedes Benz Porsche

Max-Gear is recommended for use in front or rear open differentials, manual transmissions, and lower gear units of marine engines that specify use of an API GL-5 or GL-4 fluid

Brand:
Royal Purple - Corporate Logo
ES#:
263484
Mfg#:
01300
In Stock
$22.99 USD
Free Shipping
on orders $49 and up

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

Brand:
ROWE - Corporate Logo
ES#:
5374135
Mfg#:
25002-0010-99
In Stock
$19.99 USD
Free Shipping
on orders $49 and up

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

ES#2580731 - 016409399BKT2 - Rear Differential Service Kit - With ECS Magnetic Drain/Fill Plug - Complete kit with Redline 75w90 fluid to service your rear differential - Assembled By ECS - Audi

Complete kit with Redline 75w90 fluid to service your rear differential 10X Entries For Our 25th Anniversary Sweepstakes!
For cars with 01R final drive. (2004-2007)

Brand:
Assembled By ECS - Corporate Logo
ES#:
2580731
Mfg#:
016409399BKT2
In Stock
ON SALE! SAVE 16%
$135.99

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

$113.68 USD
Free Shipping
This product is lifetime replacement eligible Partial 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

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

Axle Flange Seal - Priced Each

ES#1894525 - 0AR409399B - Axle Flange Seal - Priced Each - Fits the left & right side - Genuine Volkswagen Audi - Audi

Fits the left & right side

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
1894525
Mfg#:
0AR409399B
In Stock
24% off MSRP

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

$34.18

This product was last offered at the strikethrough price on
07-19-2026

$25.99 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 For cars with 01R final drive. (2004-2007)

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
2678603
Mfg#:
N10037106KT3
Ships in 3 Business Days
$215.99 USD
Free Shipping
This product is lifetime replacement eligible Partial 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

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
268084
Mfg#:
01V409057
In Stock
ON SALE! SAVE 12%
$38.99

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

$34.14 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 10X Entries For Our 25th Anniversary Sweepstakes!
For cars with 01R final drive. (2004-2007)

Brand:
Assembled By ECS - Corporate Logo
ES#:
3677577
Mfg#:
G052145S2KT4KT
Ships on Oct 5, 2026
Auto Notify
ON SALE!
$158.99

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

$145.53 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 Fits right side

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
267217
Mfg#:
01E409123
Special Order: No Guaranteed ETA
7% 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
07-19-2026

$138.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Rear Differential Service Kit

ES#3647632 - g052145s2ktKT4 - 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 For cars with 0AR Rear (2008-2010)

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
3647632
Mfg#:
G052145S2KTKT4
In Stock
$110.99

This product was last offered at the strikethrough price on
02-24-2026

$108.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Partial Replacement

SEAL

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

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
3640337
Mfg#:
0AR525275A
Ships in 3 Business Days
10% 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
07-19-2026

$35.99 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 10X Entries For Our 25th Anniversary Sweepstakes!
For cars with 01R final drive. (2004-2007)

Brand:
Assembled By ECS - Corporate Logo
ES#:
2538236
Mfg#:
016409399BKT
In Stock
ON SALE!
$110.99

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

$106.62 USD
Free Shipping
This product is lifetime replacement eligible Partial Replacement

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

ES#2538442 - 016409399BKT1 - 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

Complete kit with Motul Gear 300 fluid to service your rear differential 10X Entries For Our 25th Anniversary Sweepstakes!
For cars with 0AR Rear (2008-2010)

Brand:
Assembled By ECS - Corporate Logo
ES#:
2538442
Mfg#:
016409399BKT1
In Stock
ON SALE!
$71.95

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

$66.59 USD
Free Shipping
This product is lifetime replacement eligible Partial 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

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

Axle Flange Seal - Left

ES#288262 - 09E409400 - Axle Flange Seal - Left - Stop leaks from your differential - Genuine Volkswagen Audi - Audi

Stop leaks from your differential

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
288262
Mfg#:
09E409400
Ships in 3 Business Days
7% off MSRP

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

$55.99

This product was last offered at the strikethrough price on
07-19-2026

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

Axle Flange Seal - Right

Stop leaks from your differential 2X Entries For Our 25th Anniversary Sweepstakes!

Brand:
Elring - Corporate Logo
ES#:
5340514
Mfg#:
09E409399A
Special Order: No Guaranteed ETA
$20.99 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.

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