BMW Differential and Gearing Upgrades for BMW 3 Series E92 (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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Upgraded Billet Differential Cover - E82 1M, E90 E92 E93 M3
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Turner Motorsport - Corporate Logo
T#:32350852
Part#: 049395LA
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Starting at $ 1,051.47 USD
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Single piece 6061 construction, optimized cooling, provisions for temp sensor, and external cooler with removable air duct.

Built to last, made from a single piece of 6061 billet aluminum with a rugged and good-looking hard-coat anodizing the Turner diff cover can handle anything you throw at it. Not only is it an absolute masterpiece, but this billet diff cover checks all the boxes for features needed. Reinforced mounting ear for strength and stability. The mounting ear is unified with the one-piece billet cover and features added material for the highest durability possible. This diff cover is cool, literally, the entire construction was designed with optimized cooling in mind. External fins are strategically placed on the rear face, bottom, and between the mounting ears of the cover, serving as effective heat sinks for optimal heat dissipation. This ensures stable temperatures, promoting longevity for both the fluid and your differential. Additionally, the internal design ensures continuous oiling and lubrication of the ring gear, maintaining its stability and preventing fatigue by controlling heat more effectively. An internal baffle at the cover's corner helps maintain proper pressure and prevents cavitation.

All of the OEM features were retained along with the upgrades. The drain and fill plugs on the diff cover are upgraded to -6AN using the provided high-pressure fittings with replaceable o-rings. The drain and fill plugs can now be used for an external oil cooler allowing you to further expand the fluid capacity for optimized cooling and service intervals. To keep an eye on things from the driver seat is 1/8 NPT provision for temp sensors, this product from Turner has you covered at every turn.

Upgrading to our Turner Billet Differential cover gives you the strength you need to push your car to its limits without worrying about snapping a diff mount from clutch kicking or other shocks to the drivetrain. In addition to its enhanced strength, this differential cover includes numerous other upgrades and conveniences. These include improved cooling and lubrication for the ring gear, upgraded fill and drain plugs, and the option to expand an external oil cooler for extreme motorsport usage. Designed to complement both upgraded daily drivers and extensively modified track cars, it also offers a visually appealing design.

Key Benefits:

Reinforced mounting ear for strength and stability
16% Increased fluid capacity
External fins on the back side, bottom, and mounting ear on the casing for maximum cooling and consistent fluid temps
Removeable air duct to direct air across the cooling fins for even more temperature control
Optimized internal design to keep fluid consistently on the ring gear
Integrated breather to prevent cavitation by venting the appropriate amount of pressure being built up in the diff housing
-6AN ports to incorporate the use of a differential cooler - this increases capacity and lowers temps allowing for extended fluid change intervals
1/8 NPT fitting for the use of a temp sensor to monitor fluid temperature
Design:

Fits manual transmission Large Case 215mm differentials
Single piece 6061 Billet aluminum construction
T6 Black hard coat anodizing for superior corrosion resistance and aesthetics
Compatible with most differential coolers(-6AN) and temp sensors(1/8 NPT)
Designed to accommodate oversized rear sway bars
Retains OEM mounting features
Factory geometry bushing size for use with OEM and aftermarket poly bushings
Removeable air duct for easy access to sensors and drain/fill plug

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Billet Differential Cover - 215 Large Case (Manual Cars) - E82 E88 13...
For vehicles equipped with a manual transmission only. For manual transmission vehicles only, or automatic transmission vehicles produced befo...
10X Entries For Our Spin To Win Sweepstakes!
Turner Motorsport - Corporate Logo
T#:32350848
Part#: 049438LA
In Stock
Sale - Save 10% $ 1,083.99
Starting at $ 975.59 USD
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Sale - Save 10% $ 1,083.99
Starting at $ 975.59 USD
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Single piece 6061 construction, optimized cooling, provisions for temp sensor, and external cooler with removable air duct.

Built to last, made from a single piece of 6061 billet aluminum with a rugged and good-looking hard-coat anodizing the Turner diff cover can handle anything you throw at it. Not only is it an absolute masterpiece, but this billet diff cover checks all the boxes for features needed. Reinforced mounting ear for strength and stability. The mounting ear is unified with the one-piece billet cover and features added material for the highest durability possible. This diff cover is cool, literally, the entire construction was designed with optimized cooling in mind. External fins are strategically placed on the rear face, bottom, and between the mounting ears of the cover, serving as effective heat sinks for optimal heat dissipation. This ensures stable temperatures, promoting longevity for both the fluid and your differential. Additionally, the internal design ensures continuous oiling and lubrication of the ring gear, maintaining its stability and preventing fatigue by controlling heat more effectively. An internal baffle at the cover's corner helps maintain proper pressure and prevents cavitation.

All of the OEM features were retained along with the upgrades. The drain and fill plugs on the diff cover are upgraded to -6AN using the provided high-pressure fittings with replaceable o-rings. The drain and fill plugs can now be used for an external oil cooler allowing you to further expand the fluid capacity for optimized cooling and service intervals. To keep an eye on things from the driver seat is 1/8 NPT provision for temp sensors, this product from Turner has you covered at every turn.

Upgrading to our Turner Billet Differential cover gives you the strength you need to push your car to its limits without worrying about snapping a diff mount from clutch kicking or other shocks to the drivetrain. In addition to its enhanced strength, this differential cover includes numerous other upgrades and conveniences. These include improved cooling and lubrication for the ring gear, upgraded fill and drain plugs, and the option to expand an external oil cooler for extreme motorsport usage. Designed to complement both upgraded daily drivers and extensively modified track cars, it also offers a visually appealing design.

Key Benefits:

Reinforced mounting ear for strength and stability
16% Increased fluid capacity
External fins on the back side, bottom, and mounting ear on the casing for maximum cooling and consistent fluid temps
Removeable air duct to direct air across the cooling fins for even more temperature control
Optimized internal design to keep fluid consistently on the ring gear
Integrated breather to prevent cavitation by venting the appropriate amount of pressure being built up in the diff housing
-6AN ports to incorporate the use of a differential cooler - this increases capacity and lowers temps allowing for extended fluid change intervals
1/8 NPT fitting for the use of a temp sensor to monitor fluid temperature
Design:

Fits manual transmission Large Case 215mm differentials
Single piece 6061 Billet aluminum construction
T6 Black hard coat anodizing for superior corrosion resistance and aesthetics
Compatible with most differential coolers(-6AN) and temp sensors(1/8 NPT)
Designed to accommodate oversized rear sway bars
Retains OEM mounting features
Factory geometry bushing size for use with OEM and aftermarket poly bushings
Removeable air duct for easy access to sensors and drain/fill plug

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Team MFactory Helical Limited Slip Differential (LSD) - BMW E46 E82/8...
For vehicles with manual or automatic transmission (Gear ratio=3.15:1) For Vehicles with automatic transmission (ring gear machining or new ring&pinion re...
Team MFactory - Corporate Logo
T#:379412
Part#: MF-TRS-05E46A
In Stock
$ 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 Helical Limited Slip Differential. The smooth consistent distribution of power to the wheels with the MFactory Helical LSD puts the power to the ground and maximizes your vehicle's traction. A must for any car be it street, strip, or track. 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.
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Team MFactory - Corporate Logo
T#:381009
Part#: MF-TRS-DBE46S
Ships in 2 Business Days
$ 299.99 USD
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$ 299.99 USD
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Installing a new LSD unit or just performing maintenance on your diff? This kit includes 10 Differential Ring Gear Bolts, new axle seals, and new differential bearings to make your project a bit easier.
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Rear Differential Carrier Bushing - Front Position - E82,E90,E92,E93 ...
This is an M specification bushing and is an upgrade for your vehicle
Genuine BMW - Corporate Logo
T#:13479
Part#: 33312284019
In Stock
Sale - Save 5% $ 56.99
$ 54.14 USD
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$ 54.14 USD
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BMW M replacement bushing. Great stock replacement for M vehicles or as an upgraded to the non-M bushings.
Genuine BMW - Corporate Logo
T#:370652
Part#: E46M3DIFSER
In Stock
Sale - Save 5% $ 176.99
$ 167.94 USD
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Sale - Save 5% $ 176.99
$ 167.94 USD
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Team MFactory - Corporate Logo
T#:379407
Part#: MF-TRS-05E92
Ships in 2 Business Days
5% off MSRP $ 1,049.99
$ 999.99 USD
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5% off MSRP $ 1,049.99
$ 999.99 USD
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Gaining a prominent edge over the competition is now within reach, thanks to the MFactory Helical Limited Slip Differential offered by Turner Motorsport. This Helical LSD ensures a seamless and uniform distribution of power to your BMW's wheels, significantly enhancing traction whether you're on the street, strip, or track. It's an absolute necessity for BMW enthusiasts.

Curious about the LSD's role? Without it, your car essentially operates as a one-wheel-drive machine, delivering torque solely to the wheel with less grip. This is where the Helical LSD shines, as it allows both wheels to receive power by limiting the speed difference between them, in contrast to the open differentials found in most vehicles.

Key Features:

  • 30-Day Feel the Torque™ Money Back Guarantee: An industry-first assurance that enables you to experience the difference. Furthermore, it comes with a Limited-Lifetime Warranty, offering peace of mind.
  • Forged and Cryo-Tempered: Engineered to deliver exceptional durability and extended lifespan, ensuring it can withstand the rigors of even the most demanding challenges.
  • Advanced Shot Peening Technology: Enhances surface hardness, making it well-equipped to handle the shocks experienced in competition-level drag racing.
  • Maintenance-Free Gears: Bid farewell to the hassles associated with special fluids or rebuilds commonly required for plate LSDs. It's designed for a trouble-free ownership experience.
  • Lock-Free Operation: Ensures there's no adverse impact on steering response, delivering a smooth driving experience.

Break-In Procedure: For optimal performance, it's recommended to change the fluid after the first 3-400 miles of use.

Please note that any defects or warranty claims should be directed to Team MFactory.

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Genuine BMW - Corporate Logo
T#:60061
Part#: 33312283384
In Stock
3% off MSRP $ 96.99
$ 93.99 USD
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3% off MSRP $ 96.99
$ 93.99 USD
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This is the rear differential carrier bushing located in the rear subframe.

Metal Plate Limited-Slip Differential - 1.5/2.0 Way, V2
For vehicles with an automatic transmission For vehicles with a manual transmission
Team MFactory - Corporate Logo
T#:379410
Part#: MF-TRS-10E90B
In Stock
$ 999.99 USD
Free Shipping
$ 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 2-way differential will provide torque transfer during both acceleration and deceleration. This means that regardless of whether there is load (throttle) being applied to the differential or not, it will lock up during slippage. Ideal for those with track use in mind. 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
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Team MFactory Metal Plate Limited-Slip Differential (LSD) - 1.5 Way -...
For Vehicles with automatic transmission (ring gear machining or new ring&pinion re...
Team MFactory - Corporate Logo
T#:379408
Part#: MF-TRS-10E90A
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 maximizes your vehicle's traction. This 1.5-way differential works similarly to a 2-way in that it provides torque transfer during both acceleration and deceleration. 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.
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Team MFactory - Corporate Logo
T#:381010
Part#: MF-TRS-DBE92S
Ships in 1 Business Day
$ 296.99 USD
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$ 296.99 USD
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Differential Rebuild Kit Plus by Team MFactory

Upgrade your BMW's differential with the Differential Rebuild Kit Plus by Team MFactory. Whether you've recently replaced your differential or upgraded to a Limited-Slip, it's essential to replace the hardware to ensure optimal performance. This comprehensive kit from ECS Tuning includes 10 Differential Ring Gear Bolts, new axle seals, and new differential bearings, providing everything you need for a complete differential rebuild. With high-quality components, you can trust this kit to support your new differential or rebuild your existing unit effectively.

  • Comprehensive kit includes Differential Ring Gear Bolts, axle seals, and differential bearings
  • Ensures optimal performance of your BMW's differential
  • Perfect for differential replacement or upgrades to Limited-Slip
  • High-quality components for reliability and durability
  • Provides all necessary hardware for a complete rebuild
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Genuine BMW - Corporate Logo
T#:587067
Part#: 07512293972TKT
In Stock
$ 166.99 USD
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$ 166.99 USD
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OS Giken - Corporate Logo
T#:1387
Part#: BM237-HA
Ships in 4 Business Days
$ 1,950.00 USD
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$ 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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Team MFactory - Corporate Logo
T#:24677080
Part#: E92-215-308KT
Ships in 10 Business Days
$ 2,649.99 USD
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$ 2,649.99 USD
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Upgrade your BMW's drivetrain with this comprehensive kit that includes a new pumpkin for a hassle-free bolt-in replacement. Plus, enjoy the added benefit of a $500 refundable core charge. For any defects or warranty claims, please directly reach out to Team M Factory.

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Genuine BMW - Corporate Logo
T#:172491
Part#: 83300495143
Ships Jul 1, 2025
Sale - Save 6% $ 65.99
$ 62.23 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.

Team MFactory - Corporate Logo
T#:597536
Part#: E92-215-256KT
In Stock
$ 2,650.99 USD
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$ 2,650.99 USD
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Price includes $500 core charge *Any defects or warranty clams will have to go directly to Team M Factory*

Team MFactory - Corporate Logo
T#:381007
Part#: MF-TRS-RBSE46
Ships in 6 Business Days
$ 99.99 USD
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$ 99.99 USD
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Ensure optimal performance for your BMW's differential with the Differential Ring Gear Bolt Kit from Turner Motorsport. Whether you've recently upgraded to a Limited-Slip differential or need to restore your existing one, this kit has you covered. It includes 10 high-quality bolts along with new axle seals to provide complete hardware replacement. Trust ECS Tuning to provide everything you need from start to finish for a hassle-free installation process.
  • Complete hardware replacement kit
  • Includes 10 Differential Ring Gear Bolts and new axle seals
  • Ensures optimal performance for your differential
  • Ideal for upgrading to a Limited-Slip differential or restoring your existing one
  • Hassle-free installation process
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Team MFactory - Corporate Logo
T#:382799
Part#: MF-TRS-05E9234KT
Ships in 5 Business Days
$ 2,249.99 USD
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$ 2,249.99 USD
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Genuine BMW - Corporate Logo
T#:376883
Part#: 33117695240KT1
Ships Jul 1, 2025
Sale - Save 3% $ 270.99
$ 262.63 USD
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$ 262.63 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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Team MFactory - Corporate Logo
T#:637214
Part#: MF-TRS-DBE46
In Stock
$ 179.99 USD
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$ 179.99 USD
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Pair of out put shaft differential bearings

Genuine BMW - Corporate Logo
T#:577470
Part#: 075122939722KT
In Stock
$ 84.99 USD
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$ 84.99 USD
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Team MFactory - Corporate Logo
T#:25573478
Part#: MF-TRS-05E92DKT
Ships in 9 Business Days
$ 2,689.99 USD
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$ 2,689.99 USD
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Metal Plate Limited-Slip Differential - 1.0 Way
For vehicles with an automatic transmission For vehicles with a manual transmission
Team MFactory - Corporate Logo
T#:379404
Part#: MF-TRS-10E90
Ships in 6 Business Days
$ 999.99 USD
Free Shipping
$ 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 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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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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Metal Plate Limited-Slip Differential - 1.5 Way E46 / E8X / E9X ...
For vehicles with an automatic transmission For vehicles with a manual transmission
Team MFactory - Corporate Logo
T#:15478740
Part#: TRS-10E90B-1.5
Ships in 6 Business Days
$ 999.99 USD
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$ 999.99 USD
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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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Genuine BMW - Corporate Logo
T#:379476
Part#: 31507575785KT
Ships Jul 9, 2025
Sale - Save 3% $ 2,449.99
$ 2,376.42 USD
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$ 2,376.42 USD
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BMW E60 E90 E92 Re Manufactured Front Differential from Turner Motorsport offers a reliable and cost-effective solution to restore your BMW's drivetrain performance. This high-quality, re-manufactured differential is engineered to meet or exceed OEM standards, ensuring smooth power delivery and optimal handling. Designed to replace a worn or damaged differential, this unit provides the dependability and durability you expect from Turner Motorsport's expertise in BMW components.

  • Precision re-manufactured to meet OEM specifications
  • Enhances power distribution and vehicle handling
  • Cost-effective alternative to a new differential
  • Designed for a smooth and quiet driving experience
  • Backed by Turner Motorsport’s commitment to quality

Replace your worn front differential with the BMW E60 E90 E92 Re Manufactured Front Differential for a renewed driving experience and superior performance.

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Genuine BMW - Corporate Logo
T#:338092
Part#: 33107566176
Ships Jul 8, 2025
Sale - Save 5% $ 2,500.99
Starting at $ 2,387.29 USD
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Sale - Save 5% $ 2,500.99
Starting at $ 2,387.29 USD
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This is a complete differential to change the gearing of a manual transmission E90/E92 325i, 328i, or 330i (not for xi models) to a 3.64 ratio final drive. The standard gearing on the manual transmission cars is 3.15 or 3.23, making this E90 diff significantly shorter. This diff is from a 330i automatic where the gear ratio has to be shorter to make up for the transmission gearing differences and extra weight. This will dramatically improve acceleration on any 325i, 328i or 330i INSTANTLY! If you are looking for better off-the-line or rolling acceleration, and are willing to sacrifice a little top-speed (some of us don't get up to 150mph), this is one of the best ways to achieve it with almost no downside. There are few things that can improve your 0-to-60 and 0-to-100 times as much as shorter gearing, and this differential is clearly a best "bang-for-buck" solution for dramatically better acceleration. Since this is an Original BMW part it carries the same BMW two year warranty as any other new part. So there's no need to take a chance on a used part from a private seller. (former BMW part number 33107519944)

Changing gear ratio changes the RPM range for any given speed. Use the chart below for examples of speed vs RPM changes for the 3.64 diff.
 

2006 330i, 6-speed manual, stock 3.15 gears, 255/35-18" rear tires

Gear RatioGearSpeedRPM

40 MPH in 4th

3.154th40 MPH2,100 RPM

3.644th40 MPH2,400 RPM

70 MPH Cruise

3.156th70 MPH2,500 RPM

3.646th70 MPH2,900 RPM

5th Gear Speed @ 6,000 RPM

3.155th142 MPH6,000 RPM

3.645th123 MPH6,000 RPM

Why 5th? Because 6th does not have the mechanical advantage to get past wind resistance at these speeds - it is more of a cruise/overdrive gear. Using 5th for comparison purposes is much more relevant than having to take into account wind direction, resistance, grade, elevation, tire sizing, etc. These numbers are for comparisons among gear ratios only, not to determine what your E90 will top out at.2006-2011 325i or 328i, 6-speed manual, stock 3.23 gears, 255/35-18" rear tires

(click to expand)

Gear RatioGearSpeedRPM

40 MPH in 4th

3.234th40 MPH2,150 RPM

3.644th40 MPH2,400 RPM

70 MPH Cruise

3.236th70 MPH2,600 RPM

3.646th70 MPH2,900 RPM

5th Gear Speed @ 6,000 RPM

3.235th138 MPH6,000 RPM

3.645th123 MPH6,000 RPM

Speed in 5th gear at 6,000 RPM is for theoretical and comparison purposes only. It doesn't mean that these speeds are actually reachable.


A $100 refundable core charge must be added at the time of order. This core charge can be refunded when you ship your original diff back to us.

This item fits the following BMWs with manual transmission only:
2006-2011 E90 BMW 325i 328i 330i - Sedan
2006-2012 E91 BMW 325i 328i - Wagon
2007-2013 E92 BMW 328i - Coupe
2007-2013 E93 BMW 328i - Convertible

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Genuine BMW - Corporate Logo
T#:1002353
Part#: E46M3DIFSER1KT
Ships Jul 15, 2025
Sale - Save 5% $ 226.99
$ 214.87 USD
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Sale - Save 5% $ 226.99
$ 214.87 USD
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