BMW Differential and Gearing Upgrades for BMW 3 Series E46 (1999-2005)

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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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Differential And LSD Tune
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OS Giken - Corporate Logo
T#:34382136
Part#: BM237HAKT
Ships in 2 Business Days
$ 2,100.00 USD
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Upgrade to a better performing LSD, includes tune.
Polyurethane Differential Bushings - E46 Non-M
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Revshift - Corporate Logo
T#:1105905
Part#: PDB-E4695A
Special Order: No Guaranteed ETA
$ 129.99 USD
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$ 129.99 USD
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Utilizing high-precision machining technologies and their very own Polyurethane Manufacturing Department, every Revshift product is designed, manufactured, and tested in-house at their Detroit, Michigan facility.
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Race Polyurethane Differential Bushing Set, front - E46 Non-M ...
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Powerflex Black Series - Corporate Logo
T#:379935
Part#: PFR5-4625BX2
Ships in 1 Business Day
$ 107.99 USD
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$ 107.99 USD
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Differential bushings are responsible for keeping the differential in solid alignment while dampening drivetrain vibration. While OE rubber bushings are fine when they are new from the factory, aged and worn out rubber bushings create a multitude of issues that can range from annoying to dangerous. As a factory bushing ages, it begins to harden and become brittle. When this happens the bushing will actually shrink and allow for movement at the differential mounting point. At this point, the differential is free to shift under load causing a noticeable clunking noise under acceleration and deceleration and massively increasing the stress on the driveshaft and axles. Manual transmissions suffer the worst from this as it can make shifting difficult since the differential will shift when the clutch is engaged and disengaged.

By replacing these bushings with full polyurethane, the movement is eliminated since the mounting point is supported by a much stiffer material that will not harden or shrink over time. This means less stress on the driveshaft and axles and greater longevity of supporting components. 

Powerflex Black Series bushings are the ultimate in track and race bushings. Featuring 95A durometer polyurethane, Black Series bushings are 25% stiffer than street bushings. Engineered to perform, Powerflex performance polyurethane control arm bushings offer a supreme level of control, while still providing enough comfort for the street, with advanced polyurethane that reduces NVH that often accompanies lesser bushings. Expect improved acceleration response, more direct shifting feel and overall improved drivetrain composure with Powerflex performance polyurethane bushings.

Poweflex is a leading manufacturer of aftermarket suspension bushings. Using state of the art design and manufacturing, all replacement bushings are engineered to out-perform and out-last the ones that came in the car. Each line of bushings is meticulously tested and then re-tested to ensure perfect fitment and enduring quality through the life of the vehicle. A full lifetime warranty backs every one of their products and demonstrates the level of confidence and commitment Powerflex has to their customers. 

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E46 M3, E9X M3, E34 M5, E39 M5, Z4 M OS Giken Super Lock Limited Slip...
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OS Giken - Corporate Logo
T#:1387
Part#: BM237-HA
Ships in 2 Business Days
$ 1,950.00 USD
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The M Dynamic limited slip unit on the M3 is designed to be a pure street car differential. It's simply not up to the rigors of professional or amateur racing. The OS Giken Super Lock LSD is giant step up in from a stock M3 lsd unit. It's ready for the extreme conditions of racing, offers 100% progressive locking capability, and is able to do this while operating smoothly and quietly. It's use of advanced technologies that make it perfect for both street cars AND pro race cars... and everything in between. We're excited to be carrying the OS Giken LSD unit in our performance catalog, as we've been using them in our own Championship winning M3 race cars.

OS Giken incorporated revolutionary new ideas when developing the their own limited slip diff, utilizing their accumulated racing knowledge and experience and over 4 years of development. Their design uses an unprecedented number of friction plates (up to 28 total!) for better locking force, better engagement/disengagement, and less generated heat. The end result of their efforts is the OS Giken's OS Super Lock LSD which offers incredible durability and reliability on street and track driven BMWs. The use of highest quality materials, precise machining, forged gears and sound engineering makes this LSD durable and reliable enough for road racing performance (which we can personally vouch for!). This is such a great design, in that it can be used in any situation -- whether it's for a street car, or a 100% Professional race car. Zero break-in required. Super smooth and quiet engagement, and 100% progressive locking capability. Professional installation is recommended.

This Limited Slip Differential Unit fits the following BMWs:
2001-2006 E46 M3 coupe & convertible
2008-2013 E9X M3 coupe & convertible
1991-1995 E34 M5 sedan
1999-2003 E39 M5 sedan
2006-2008 E85 Z4M Z4 M Coupe, Z4 M Roadster
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Limited Slip Differential - E46
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Wavetrac - Corporate Logo
T#:383305
Part#: 30309176WKWVT
Ships in 2 Business Days
$ 1,245.99 USD
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Upgrade your BMW E46 with the Turner Motorsport Wavetrac Limited Slip Differential, featuring innovative design and superior materials for enhanced performance. This differential utilizes patented Wavetrac technology to automatically improve grip in low-traction conditions, setting it apart from traditional torque biasing differentials. Here are the key benefits:

  • Innovative design improves grip in low traction conditions
  • High-strength 9310 steel gears ensure durability
  • ARP fasteners used throughout for reliability
  • Maintenance-free operation for the lifetime of the differential
  • Transferable limited lifetime warranty for peace of mind

For additional technical information, visit: http://www.wavetrac.net/technical.htm

Fits ratios 2.47 – 3.07.

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Genuine BMW Rear Differential Support Bracket
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Genuine BMW - Corporate Logo
T#:60178
Part#: 33321094421
Ships in 2 Business Days
2% off MSRP $ 55.99

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

$ 54.99 USD
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2% off MSRP
$ 55.99

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

$ 54.99 USD
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Genuine BMW Push Rod -
This item fits the following BMW Chassis:
E46


E46 Finned Differential Cover Upgrade Kit
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Packaged by Turner - Corporate Logo
T#:401688
Part#: 33117512980KT
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$ 366.99 USD
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The perfect upgrade for any E46, this finned differential cover increases cooling to the rear differential to prevent over heating and possible damage. This is a complete kit including fluid and drain plugs.

Includes the following

  • Aluminum finned differential cover
  • Drain & fill plug with sealing o-ring
  • 2 Quarts of Redline 75w90
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Genuine BMW Differential Drive flange - output - E46 M3 Z3M Z4M ...
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Genuine BMW - Corporate Logo
T#:59553
Part#: 33137840564
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1% off MSRP $ 189.99

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$ 188.99 USD
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1% off MSRP
$ 189.99

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

$ 188.99 USD
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Genuine BMW Drive Flange, Output, Right
This item fits the following BMW Chassis:
E46 M3,E85 Z4M,E46,E85 Z4,E86 Z4


Genuine BMW Axle Seal Driver - BMW E46 M3, E9X M3, E82 1M, E39 M5, E6...
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Genuine BMW - Corporate Logo
T#:172491
Part#: 83300495143
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$ 82.99 USD
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This Axle Seal Driver is used to install 76x50x10 axle seals on TYP210 and TYP215 differentials, ensuring the seals are fully seated.

E46 M3 Stock Differential Cover With Bushings
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Genuine BMW - Corporate Logo
T#:1333
Part#: 33112282482
Ships in 2 Business Days
3% off MSRP $ 826.99

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$ 800.99 USD
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3% off MSRP
$ 826.99

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$ 800.99 USD
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BMW does not sell the differential mounts separate from the cover. And as with all rubber mounts, they will have to be replaced at some point, forcing you to also buy a new diff cover. This is an Original BMW part.
**Note** - a paper gasket is not sold with this cover. BMW no longer uses paper gaskets - they advise the use of a silicone sealant such as RTV black.

Applications:
2001-2006 E46 M3, M3 CSL, coupe and convertible

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6 Speed Manual Gearbox - E46 M3
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Genuine BMW - Corporate Logo
T#:225851
Part#: 23002229721
Ships in 8 Business Days
3% off MSRP $ 18,461.99

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

$ 17,981.99 USD
3% off MSRP
$ 18,461.99

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

$ 17,981.99 USD


Genuine BMW Rmfd-6 Speed Gearbox - S6S 420G - Tbai
This item fits the following BMW Chassis:
E46 M3,E46

Genuine BMW Differential Cross Member - E46 M3
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Genuine BMW - Corporate Logo
T#:13478
Part#: 33312229295
Ships in 8 Business Days
2% off MSRP $ 446.99

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

$ 436.99 USD
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2% off MSRP
$ 446.99

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

$ 436.99 USD
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Genuine BMW Push Rod
This item fits the following BMW Chassis:
E46 M3,E46



Performance Differential Cover install kit
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Packaged by Turner - Corporate Logo
T#:556968
Part#: 33112282482KT3
Ships on Sep 4, 2026
Sale - Save 7% $ 676.14

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

$ 627.61 USD
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Sale - Save 7%
$ 676.14

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

$ 627.61 USD
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This kit includes Turner Motorsport solid aluminum differential race mounts pre installed in the differential cover for a quick install. These mounts where developed by Turner Motorsport for their Grand-Am Cup E46 M3 race cars, the advantages of solid aluminum mounts is increased suspension & drivetrain response, less drivetrain loss resulting in more wheel horsepower, and longevity - they effectively last forever. These CNC-machined mounts are a direct replacement for the stock rubber pieces, and have been lightened to remove excess weight. 

 

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BMW S38 Helical Limited Slip Differential
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Team MFactory - Corporate Logo
T#:379403
Part#: MF-TRS-05E39
Back Ordered
$ 999.99 USD
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$ 999.99 USD
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Allows for traction at all times by providing the most power to the wheel with more grip. Unlike plate differentials (1,1.5,2-way) helical LSDs can supply different spin rates to each axle, like when cornering.
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Genuine BMW Differential Plug Gasket, 22x27 - 07119963355
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Genuine BMW - Corporate Logo
T#:348476
Part#: 07119963355
In Stock
$ 3.40 USD
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When servicing the rear axle and differential, it is always best to replace this sealing washer to prevent any potential leaks from forming.

Driveshaft Seal
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Genuine BMW - Corporate Logo
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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Driveshaft Seal
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Corteco - Corporate Logo
T#:594925
Part#: 31507609535
In Stock
$ 9.99 USD
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Seals the driveshaft to the differential
Genuine BMW Rear Axle Hex Bolt With Washer - M12 1.5x80
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Genuine BMW - Corporate Logo
T#:13460
Part#: 33176760337
In Stock
$ 11.99

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

$ 9.99 USD
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$ 9.99 USD
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Replace your differential mounting hardware during service to eliminate problems caused by rusted or stripped hardware.

URO Differential Output Shaft Seal W/ Lock Ring - BMW E36 E46 E53 E60...
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URO - Corporate Logo
T#:43750219
Part#: 33107505604
In Stock
$ 10.00 USD
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$ 10.00 USD
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Maintaining a proper amount of fluid in the rear differential is vital to the performance and longevity of the differential. If a leaking shaft seal is left untouched, the results could be catastrophic. Two seals required per vehicle.
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Rear Axle Rubber Mounting FRONT 33176770788
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Lemforder - Corporate Logo
T#:15674
Part#: 33176770788
In Stock
$ 17.99

This product was last offered at the strikethrough price on
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$ 12.50 USD
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$ 12.50 USD
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RUBBER MOUNTING FRONT

Genuine BMW Front Axle Hexagon Screw With Flange 31106772199 ...
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Genuine BMW - Corporate Logo
T#:12469
Part#: 31106772199
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$ 7.99 USD
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GENUINE BMW HEXAGON SCREW WITH FLANGE:319500

Differential Drain Plug with O-Ring - Most BMWs
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Genuine BMW - Corporate Logo
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
(click to expand)
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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Genuine BMW Hex Nut With Plate - 07129904862
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Genuine BMW - Corporate Logo
T#:28828
Part#: 07129904862
In Stock
$ 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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Genuine BMW Output Shaft Seal - 33107505604
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Genuine BMW - Corporate Logo
T#:360861
Part#: 33107505604
In Stock
9% 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.

$ 16.50 USD
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9% 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.

$ 16.50 USD
Free Shipping on orders $49 and up
**Will only fit E92's after a production date of 9/2007 Two seals are required per vehicle. Maintaining a proper amount of fluid in the rear differential is vital to the performance and longevity of the differential. If a leaking shaft seal is left untouched, the results could be catastrophic.
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Genuine BMW O-ring - 33111214144
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Genuine BMW - Corporate Logo
T#:25199
Part#: 33111214144
In Stock
$ 8.99 USD
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Genuine BMW O-Ring - D=90Mm/3Mm
This item fits the following BMW Chassis:
E30 M3,E36 M3,E34 M5,E60 M5,E63 M6,E46 M3,E82 1M Coupe,E85 Z4M,E30,E34,E36,E38,E46,E63,E82,E85 Z4,E86 Z4,E90,E92,E93,F06,F10,F12,F13,F80 M3,F82 M4,F83

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Shaft Seal - Differential (Axle Drive)
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Elring - Corporate Logo
T#:54852004
Part#: B46.610
In Stock
New Item
$ 14.99 USD
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This OEM-quality replacement shaft seal from Elring is the perfect fix for keeping your gear oil where it belongs.
Genuine BMW Engine & Trans Suspension Hex Nut With Plate 22316760944 ...
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Genuine BMW - Corporate Logo
T#:7561
Part#: 22316760944
In Stock
$ 2.99 USD
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Genuine BMW Hex Nut With Plate - M8
This item fits the following BMW Chassis:
E30 M3,E36 M3,E34 M5,E39 M5,E60 M5,E63 M6,E46 M3,E82 1M Coupe,E85 Z4M,E30,E34,E36,E38,E39,E46,E63,E65,E82,E85 Z4,E86 Z4,E89 Z4,E90,E92,E93,F22,F30,F31,F32,F33,F34,F36,F80 M3,F82 M4,F83

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Billet Diff Cover Replacement Drain Plug
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Bremmen Parts - Corporate Logo
T#:19362530
Part#: 4835K45
In Stock
Sale - Save 15% $ 6.99

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

$ 5.93 USD
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Sale - Save 15%
$ 6.99

This product was last offered at the strikethrough price on
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$ 5.93 USD
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Extreme-Pressure Steel Plug With Hex Drive - Fluoroelastomer Rubber Gasket, 9/16"-18 UN/UNF Thread

Differential Input Shaft Seal - Priced Each
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URO - Corporate Logo
T#:49335120
Part#: 33121213949
In Stock
New Item
$ 18.99 USD
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Replaces cracked or hardened valve body seals
Corteco Output Shaft Seal
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Corteco - Corporate Logo
T#:583459
Part#: 33107505604
In Stock
$ 14.42

This product was last offered at the strikethrough price on
07-06-2026

$ 11.99 USD
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$ 11.99 USD
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Seals the axles into the differential

Differential Oil Drain Plug
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Rein - Corporate Logo
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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SKF Seal - Differential Pinion Shaft (50 X 80 X 9 mm)
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SKF - Corporate Logo
T#:588869
Part#: 33121213949
In Stock
$ 17.99 USD
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Victor Reinz Differential Cover Gasket - E31, E32, E34, E39, E46, Z4 ...
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Victor Reinz - Corporate Logo
T#:362602
Part#: 33108305033
In Stock
$ 3.01 USD
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Seals the rear differential cover

Metal Plate Limited-Slip Differential - 1.0 Way
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Team MFactory - Corporate Logo
T#:379409
Part#: MF-TRS-10E46
Ships in 6 Business Days
$ 999.99 USD
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$ 999.99 USD
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The best way to gain a prominent advantage over the competition is to do it with the MFactory Metal Plate Limited Slip Differential. The smooth consistent distribution of power to the wheels with the MFactory Plate LSD puts the power-to-the-ground and maximises your vehicle's traction. This 1-way differential will provide torque transfer only during accelleration. This set up works the best for the drag race minded drivers. What exactly does an LSD do you ask? Well without an LSD your car is actually 1 wheel drive, in that it can't supply torque to both wheels at the same time and will only supply torque to the wheel with less grip, which is what the shortfall is to an open differential (what most vehicles have). An LSD only lets the wheels spin at different speeds by a limited amount (typically this is a percentage difference) which is when the differential locks and both wheels get power. This is not how locked differentials work such as in off road trucks which supply equal torque and rotational speed to both rear wheels at the same time, which can cause issues with handling. Features: Forged and Cryo-Tempered for unsurpassed toughness Advanced Shot Peening technology for increased surface hardness Coil Spring preload system ensures minimal power loss and maximum response Lower initial pressure ensures maximum durability and chatter-free operation Fully rebuildable with adjustable lock (80-100%) and option for different cam types Cam type provides the option for 2 distinct levels of initial torque transfer Available in 1.0, 1.5, and 2.0 way options *Any defects or warranty clams will have to go directly to Team M Factory*
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Metal Plate Limited-Slip Differential - 1.0 Way
For vehicles with an automatic transmission
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Team MFactory - Corporate Logo
T#:379404
Part#: MF-TRS-10E90
Ships in 6 Business Days
$ 999.99 USD
Free Shipping
$ 999.99 USD
Free Shipping
The best way to gain a prominent advantage over the competition is to do it with the MFactory Metal Plate Limited Slip Differential. The smooth consistent distribution of power to the wheels with the MFactory Plate LSD puts the power-to-the-ground and maximises your vehicle's traction. This 1-way differential will provide torque transfer only during acceleration. This set up works the best for the drag race minded drivers. What exactly does an LSD do you ask? Well without an LSD your car is actually 1 wheel drive, in that it can't supply torque to both wheels at the same time and will only supply torque to the wheel with less grip, which is what the shortfall is to an open differential (what most vehicles have). An LSD only lets the wheels spin at different speeds by a limited amount (typically this is a percentage difference) which is when the differential locks and both wheels get power. This is not how locked differentials work such as in off road trucks which supply equal torque and rotational speed to both rear wheels at the same time, which can cause issues with handling. Features: Forged and Cryo-Tempered for unsurpassed toughness Advanced Shot Peening technology for increased surface hardness Coil Spring preload system ensures minimal power loss and maximum response Lower initial pressure ensures maximum durability and chatter-free operation Fully rebuildable with adjustable lock (80-100%) and option for different cam types Cam type provides the option for 2 distinct levels of initial torque transfer Available in 1.0, 1.5, and 2.0 way options
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Front Differential Input Shaft Seal
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Corteco - Corporate Logo
T#:594926
Part#: 31521428678
Ships in 1 Business Day
$ 17.99 USD
Free Shipping on orders $49 and up
Seals the input shaft flange to the front differential


Metal Plate Limited-Slip Differential - 1.5 Way
For vehicles with an automatic or manual transmission with a Final Gear Ratio of 3.07 o...
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Team MFactory - Corporate Logo
T#:379401
Part#: MF-TRS-10E46A
Ships in 6 Business Days
$ 999.99 USD
Free Shipping
$ 999.99 USD
Free Shipping
The best way to gain a prominent advantage over the competition is to do it with the MFactory Metal Plate Limited Slip Differential. The smooth consistent distribution of power to the wheels with the MFactory Plate LSD puts the power-to-the-ground and maximises your vehicle's traction. This 1.5-way differential works similar to a 2-way in that it provides torque transfer during both accelleration and decelleration. However, the advantage over a 2-way is that it requires less force to lock the differential. This means that it will allow for different wheel speeds, like when cornering. A 1.5-way differential is typically the best option for track or street use, as it keeps from having one tire skipping or dragging. What exactly does an LSD do you ask? Well without an LSD your car is actually 1 wheel drive, in that it can't supply torque to both wheels at the same time and will only supply torque to the wheel with less grip, which is what the shortfall is to an open differential (what most vehicles have). An LSD only lets the wheels spin at different speeds by a limited amount (typically this is a percentage difference) which is when the differential locks and both wheels get power. This is not how locked differentials work such as in off road trucks which supply equal torque and rotational speed to both rear wheels at the same time, which can cause issues with handling. Features: Forged and Cryo-Tempered for unsurpassed toughness Advanced Shot Peening technology for increased surface hardness Coil Spring preload system ensures minimal power loss and maximum response Lower initial pressure ensures maximum durability and chatter-free operation Fully rebuildable with adjustable lock (80-100%) and option for different cam types Available in 1.0, 1.5, and 2.0 way options *Any defects or warranty clams will have to go directly to Team M Factory*
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Metal Plate Limited-Slip Differential - 1.5 Way E46 / E8X / E9X ...
For vehicles with an automatic transmission
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Team MFactory - Corporate Logo
T#:15478740
Part#: TRS-10E90B-1.5
Ships in 6 Business Days
$ 999.99 USD
Free Shipping
$ 999.99 USD
Free Shipping

Unleash the full potential of your BMW and gain a competitive edge with the Turner Motorsport MFactory Metal Plate Limited Slip Differential. Engineered for superior performance, this differential ensures a smooth and consistent distribution of power to the wheels, maximizing traction and putting the power firmly on the ground. The 1.5-way design provides torque transfer during acceleration and halfway through deceleration, making it an ideal choice for those focused on track use.

  • Prominent advantage with the MFactory Metal Plate Limited Slip Differential.
  • Maximizes traction for enhanced vehicle performance.
  • 1.5-way design for torque transfer during acceleration and deceleration.
  • Turns your car into a true 2-wheel drive, improving grip.
  • Ideal for track enthusiasts seeking superior handling.

Upgrade your BMW's drivetrain with the Turner Motorsport MFactory Metal Plate Limited Slip Differential for unmatched toughness and performance.

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Rogue Engineering E46 M3 Differential Bushing (Front Position) FIX ...
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Rogue Engineering - Corporate Logo
T#:54388516
Part#: RE.484.FIX
Ships in 8 Business Days
New Item
$ 64.00 USD
Free Shipping on orders $49 and up
A common failure point on the BMW E46 M3 platform occurs when the side differential mounting bolt backs out, leading to stripped threads in the differential cover.

LSD Tune For OS Giken Differential
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
OS Giken - Corporate Logo
T#:34382134
Part#: LSD-TUNE
Ships in 2 Business Days
$ 150.00 USD
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$ 150.00 USD
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Front Differential Input Shaft Seal
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Genuine BMW - Corporate Logo
T#:485407
Part#: 31527507697
Ships in 2 Business Days
7% off MSRP $ 13.99

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

$ 12.99 USD
Free Shipping on orders $49 and up
7% off MSRP
$ 13.99

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

$ 12.99 USD
Free Shipping on orders $49 and up
Seals the input shaft flange to the front differential
Genuine BMW Differential Dust Cover
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Genuine BMW - Corporate Logo
T#:174741
Part#: 33137600693
Ships in 2 Business Days
$ 16.99 USD
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Genuine BMW Dustcover Plate.

Rein Differential Drain Plug Gasket
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2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
Rein - Corporate Logo
T#:19654
Part#: 07119963355
Ships in 3 Business Days
$ 2.03 USD
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GASKET RING for various sensors and seals.
E46, Z4 Differential Upgrade - 3.64 Original BMW
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Genuine BMW - Corporate Logo
T#:107
Part#: 33107514198
Ships in 8 Business Days
$ 2,680.99 USD
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$ 2,680.99 USD
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Price includes $100.00 core charge.

Differential Service Kit - With Service Tools
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Genuine BMW - Corporate Logo
T#:1002353
Part#: E46M3DIFSER1KT
Ships on Jul 28, 2026
$ 277.99

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

$ 264.99 USD
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$ 264.99 USD
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Elring Differential Input Shaft Seal - 50x80x9mm - BMW E82 1M, E46 M3...
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Elring - Corporate Logo
T#:44733256
Part#: 703.190
Special Order: No Guaranteed ETA
$ 34.99 USD
Free Shipping on orders $49 and up
If your differential is leaking fluid from the input shaft at the front of the diff case, there is a good chance this seal is faulty. Replace your leaking seal with this new seal from Elring to prevent further fluid loss and prevent damage to your differential. Replaces BMW p/n 33121213949, 33121212197, & 33121204847
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IRP Aluminum Differential Bushings - E46 M3
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IRP - Individual Racing Parts - Corporate Logo
T#:587020
Part#: IRPDB-46MAL
Special Order: No Guaranteed ETA
$ 151.99 USD
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$ 151.99 USD
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These aluminum mounts are a direct replacement for the stock rubber bushings and have been lightened to remove excess weight. Using aluminum instead of rubber eliminates the "wind up" inherent in rubber mounts, and this deflection slows suspension & drivetrain response. The tradeoff is an increase in NVH. Features: Stiffens chassis/Improves stability Less wear of other components Better durability Provides better control of chassis geometry Replaces OE: 33172282484 Recommended for racing use only Includes: 2 rear aluminum bushing 1 front aluminum bushings
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Febi Drain Plug Gasket
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We Price Match - Give Us A Call or Chat!
Febi - Corporate Logo
T#:340702
Part#: 07119963355
Ships on Oct 7, 2026
$ 1.99 USD
Free Shipping on orders $49 and up
22x27 aluminum sealing ring


Front Differential Bushing - Priced Each
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
We Price Match - Give Us A Call or Chat!
Meyle - Corporate Logo
T#:36032352
Part#: 33176770788
Special Order: No Guaranteed ETA
$ 15.99 USD
Free Shipping on orders $49 and up
The subframe serves as the mounting point for your rear suspension, connecting to the vehicle's body with bushings designed to absorb vibrations. These bushings minimize vibrations transmitted to the cabin while maintaining a secure and stable connection, ensuring tight and reliable suspension performance.
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Front Differential Input Seal Kit - E46, E53, E60, E61, F30
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Packaged by Turner - Corporate Logo
T#:41289766
Part#: 31521428678TKT
Back Ordered
$ 52.99

This product was last offered at the strikethrough price on
07-06-2026

$ 50.99 USD
Free Shipping on orders $49 and up
$ 50.99 USD
Free Shipping on orders $49 and up
This kit comes with the seal and both dust covers needed to re-seal your vehicles input shaft on the front differential.