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BMW Differential and Gearing Upgrades for BMW X Series E70 (2007-2013)

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Upgrading various parts of the differential can have tremendous benefits in your car's performance. It's easy to forget that the differential is a source for making your car faster and handle better so it's often overlooked. The engine is not the only place to make the car faster. Our differential options vary from gearing upgrades to limited slip conversions. You can purchase the ring & pinion gear sets on their own (professional installation required) or have us build a diff around your own specifcations. The options are almost endless! Every custom-built diff is fully rebuilt with seals and bearings. We also design and supply bushing options to reduce driveline wind-up, finned differential covers for better cooling, and more!

Ratio Changes - Changing the differential gearing is one of the best and most-effective upgrades you can make on any BMW (old or new). By using a shorter (numerically higher) final drive ratio you are increasing your RPM relative to road speed - this puts you in a more powerful RPM range than before! Since you're in a 'meatier' part of the power band you're now putting down more power/torque to the ground. If you can trade outright top speed for faster acceleration at daily speeds then this is the perfect upgrade for you.

Limited Slip Upgrades - Sadly, many BMWs today are not equipped with a limited slip (posi-traction) differential. BMW has tried to compensate by using traction control that cuts power at the engine or applies the brakes to retard wheel spin (or a combination of both). But nothing beats the function and feel of a a true LSD which may be why BMW continues to use them in M cars. Our LSD upgrades can be done a number of different ways - a factory-type limited slip unit with either 2 or 3 clutch packs, helical type, OS Giken unit, or something truly custom. We can also vary ramp angles and setup to change the limited-slip behavior under acceleration, deceleration, and cornering. Need a custom diff? Call or e-mail to have a quote.

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OEM Rein Magnetic Differential Oil Drain Plug - M22x1.5 - Most BMW &a...

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T#:38890943

Part#: HWU0065

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$ 23.99 USD

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$ 23.99 USD

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As components in the differential begin to wear, metal particles become loose in the diff fluid, which can lead to excess wear. This magnetic plug pulls these particles out of suspension, helping to reduce wear over time. Replaces BMW # 33117525064

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Loctite 5970 Gasket/Sealing Compound - 50ml

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T#:25772539

Part#: 5970

In Stock at Vendor

$ 66.64

This product was last offered at the strikethrough price on
12-26-2025

$ 52.25 USD

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$ 52.25 USD

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This Loctite 5970 Sealant is recommended by BMW to be used to seal the rear differential cover and numerous engine oil pans. Also used for multiple MINI, Audi, and VW applications.

Rear Differential Service Kit for various BMW Models

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T#:42133544

Part#: 835225790TKT

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$ 59.72 USD

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$ 59.72 USD

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The kit includes 2 Quarts of Red line 75w90 - 57904 and brand new Rein rear diff oil drain plug M22x1.5

BMW Differential Seal - Rear Axle

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T#:28570751

Part#: 33108860348

In Stock

7% off MSRP $ 96.99

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

$ 89.99 USD

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7% off MSRP

$ 96.99

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

$ 89.99 USD

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The BMW Axle Shaft Seal is an essential component designed to prevent fluid leaks around the axle shaft, ensuring the proper functioning of the vehicle's drivetrain system. This seal helps protect the differential or transmission, keeping contaminants like dirt and water out while retaining the necessary lubricants. Key Features: Prevents Leaks: Effectively stops oil or fluid leaks, preserving drivetrain performance. Durable Construction: Made from high-quality rubber or synthetic materials for long-lasting resistance to wear. OEM Quality: A genuine BMW part, ensuring a perfect fit and reliable functionality. Performance Protection: Shields drivetrain components from contaminants and minimizes the risk of premature damage. Application: Used in BMW vehicles, the axle shaft seal ensures the axle shaft remains sealed during operation, preventing fluid loss and protecting against potential damage to other parts.

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Genuine BMW Output Shaft Seal Dust Cover - Large

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T#:59505

Part#: 33131428097

Ships in 1-2 days

7% off MSRP $ 56.99

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

$ 52.99 USD

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7% off MSRP

$ 56.99

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

$ 52.99 USD

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Genuine BMW Dust Guard Ring, Outer - D=68,8
This item fits the following BMW Chassis:
E39,E46,E53 X5,E65,E70 X5,E82,E83 X3,E85,E86,E89 Z4,E90,E92,E93,F01,F02,F06,F10,F12,F13,F15,F16,F25 X3,F26 X4

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Complete Xdrive Differential And Transfer Case Service Kit

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T#:587067

Part#: 07512293972TKT

In Stock

$ 184.99

This product was last offered at the strikethrough price on
06-03-2026

$ 177.99 USD

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$ 177.99 USD

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Genuine BMW Differential Service Kit - E90/2/3 328i 330i/xi, E53 E70...

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T#:376883

Part#: 33117695240KT1

Ships in 4 Business Days

$ 304.99

This product was last offered at the strikethrough price on
03-04-2026

$ 274.99 USD

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$ 274.99 USD

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Often overlooked, scheduled rear differential service is very important. Over time gear lube breaks down causing bearings and internal components fail. Regular maintenance will keep your vehicle running properly for years to come.

Please see kit contents tab for included items.

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Genuine BMW Hex Nut With Plate - 07129904862

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T#:28828

Part#: 07129904862

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$ 3.99 USD

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$ 3.99 USD

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Genuine BMW Hex Nut With Plate
This item fits the following BMW Chassis:
E39 M5,E60 M5,E63 M6,E46 M3,E70 X5M,E71 X6M,E85 Z4M,E53 48IS,E30,E36,E38,E39,E46,E53 X5 X5,E63,E65,E70 X5,E71 X6,E85 Z4,E86 Z4,E89 Z4,E90,E92,E93,F01,F02,F06,F10,F12,F13,F15,F16

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Differential Oil Drain Plug

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2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!

T#:27405453

Part#: 33117525064

In Stock

$ 11.99

This product was last offered at the strikethrough price on
05-21-2026

$ 9.99 USD

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$ 9.99 USD

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Complete Xdrive Differential And Transfer Case Service Kit - E90, E91...

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T#:42099854

Part#: 07512293972T3KT

In Stock

Sale - Save 13% $ 303.99

This product was last offered at the strikethrough price on
05-03-2026

$ 263.18 USD

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Qty

Sale - Save 13%

$ 303.99

This product was last offered at the strikethrough price on
05-03-2026

$ 263.18 USD

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Maintain smooth power distribution, protect your drivetrain, and extend the life of your BMW xDrive system with the Complete Xdrive Differential And Transfer Case Service Kit - E90, E91, E92, E60, E61, E70.

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Differential Drain Plug with O-Ring - Most BMWs

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T#:7923

Part#: 33117525064

In Stock

15% off MSRP $ 11.61

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

$ 9.87 USD

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15% off MSRP

$ 11.61

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

$ 9.87 USD

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This is the front or rear Genuine BMW differential fluid drain plug for many BMWs. This can also be the transfer case plug or automatic transmission plug on some BMWs.

+ Year & Model Applications

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This item fits the following BMWs:
1970-1976 2002 BMW 1600 2002 2002tii
2008+ E82 BMW 128i 135i 1M Coupe
1977-1983 E21 BMW 320i 323i
1984-1991 E30 BMW 318i 318is 318ic 325e 325es 325i 325ic 325is 325ix M3
1992-1998 E36 BMW 318i 318is 318ti 318ic 323is 323ic 325i 325is 325ic 328i 328is 328ic M3
1999-2005 E46 BMW 323i 323ci 325i 325ci 325xi 328i 328ci 330i 330ci 330xi M3
2006-2011 E90 BMW 325i 325xi 328i 328xi 328i xDrive 330i 330xi 335d 335i 335xi 335i xDrive M3 - Sedan
2006-2012 E91 BMW 325xi 328i 328xi 328i xDrive - Wagon
2007-2012 E92 BMW 328i 328xi 328i xDrive 335i 335is 335xi 335i xDrive M3 - Coupe
2007-2012 E93 BMW 328i 335i M3 - Convertible
1976-1981 E12 BMW 528i 530i
1982-1988 E28 BMW 524td 528e 533i 535i 535is M5
1989-1995 E34 BMW 525i 530i 535i 540i M5
1997-2003 E39 BMW 525i 528i 530i 540i M5
2004-2010 E60 BMW 525i 525xi 530i 530xi 528i 528xi 528i xDrive 535i 535xi 535i xDrive 545i 550i M5
2010+ F07 BMW 535i GT, 535i xDrive GT, 550i GT, 550i xDrive GT
2011+ F10 BMW 528i 528i xDrive 535i 535i xDrive 550i 550i xDrive M5
1982-1989 E24 BMW 633csi 635csi M6
2004-2010 E63 BMW 645ci 650i M6
2012+ F12 BMW 640i 650i
1981-1987 E23 BMW 733i 735i
1988-1994 E32 BMW 735i 735il 740i 740il 750il
1995-2001 E38 BMW 740i 740il 750il
2002-2008 E65 BMW 745i 745li 750i 750li 760i 760li
2009+ F01 BMW 740i 740li 750i 750li 750i xDrive 750li xDrive 760li
1990-1999 E31 BMW 840i 840ci 850i 850ci 850csi
2004-2010 E83 BMW X3 2.5i X3 3.0i X3 3.0si
2011+ F25 BMW X3 xDrive28i X3 xDrive35i
2000-2006 E53 BMW X5 3.0i X5 4.4i X5 4.6is X5 4.8is
2007-2013 E70 BMW X5 3.0si X5 4.8i X5 xDrive30i X5 xDrive35d X5 xDrive35i X5 xDrive48i X5M
2008+ E71 BMW X6 xDrive35i X6 xDrive50i X6M
1997-2002 Z3 BMW Z3 1.9 Z3 2.3 Z3 2.5i Z3 2.8 Z3 3.0i M Roadster M Coupe
2003-2008 E85 BMW Z4 2.5i Z4 3.0i Z4 3.0si Z4 M Roadster M Coupe
2009+ Z4 BMW Z4 sDrive30i Z4 sDrive35i Z4 sDrive35is
2000-2003 E52 BMW Z8 Roadster

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Driveshaft Seal

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T#:362306

Part#: 31507609535

In Stock

12% off MSRP $ 18.20

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

$ 15.95 USD

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12% off MSRP

$ 18.20

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

$ 15.95 USD

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OEM Elring Rear Differential Axle Shaft Seal - BMW F3X G2X G8X & ...

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T#:53008820

Part#: 33108860348

In Stock at Vendor

$ 44.99

This product was last offered at the strikethrough price on
05-08-2026

$ 43.99 USD

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$ 43.99 USD

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The Axle Shaft Seal is a critical component designed to prevent fluid leaks around the axle shaft, ensuring the proper function of the vehicle’s drivetrain system. This seal helps maintain the integrity of the differential, preventing dirt, water, or contaminants from entering the diff while keeping lubricants contained.

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Genuine BMW Lock Ring - 27107539525

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T#:53816

Part#: 27107539525

Ships in 1-2 days

6% off MSRP $ 16.99

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

$ 15.99 USD

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6% off MSRP

$ 16.99

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

$ 15.99 USD

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Replace these when reassembling the transfer case. Genuine BMW Lock Ring - 28X2 This item fits the following BMW Chassis: E70 X5M,E71 X6M,E53 48IS,E53 X5,E70 X5,E71 X6,E83 X3,E90,E92,F01,F02,F06,F10,F12,F13,F15,F16,F25 X3,F26 X4 X4,F30,F31,F32,F33,F34,F36

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Final Drive (FRONT AXLE)

For vehicles with a production date from 04/2010+

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T#:614164

Part#: 31507594314

Ships in 1-2 days

7% off MSRP $ 3,187.99

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

$ 2,968.99 USD

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7% off MSRP

$ 3,187.99

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

$ 2,968.99 USD

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No core charge required

Genuine BMW Differential Dust Cover

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T#:174741

Part#: 33137600693

Ships in 1-2 days

6% off MSRP $ 16.99

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

$ 15.99 USD

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Qty

6% off MSRP

$ 16.99

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

$ 15.99 USD

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Genuine BMW Dustcover Plate.

Front Differential Input Seal Kit - E46, E53, E60, E61, F30

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T#:41289766

Part#: 31521428678TKT

Back Ordered

$ 51.99

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

$ 49.99 USD

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$ 49.99 USD

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This kit comes with the seal and both dust covers needed to re-seal your vehicles input shaft on the front differential.

Shaft Seal with Lock Ring - Differential Output Shaft (43 X 90 X 10 m...

For vehicles with production date up to 08/09

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T#:599651

Part#: 33107564416

Back Ordered

$ 17.99 USD

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$ 17.99 USD

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This item fits the following BMW Chassis: E70 X5,E89 Z4,F01,F02,F06,F10,F12,F13,F15,F16,F22,F25 X3,F26 X4,F30,F31,F32,F33,F34,F36

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