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

Clear BMW chassis
Rubber mounts are used to locate the differential to the subframe in RWD BMWs. This is one area that we like to focus on to improve power transfer, response time, and the overall feel of the drivetrain. By using a stiffer bushing you reduce or eliminate the 'wind up' and deflection of the stock rubber differential mounts when power is applied. A solid bushing will not twist when power (torque) is applied. Instead that power is directed to the drive wheels where it will do the most good. Our diff mount upgrades are solid rubber, Delrin, or aluminum kits depending on the application and the intended use. Even though these were developed for our race cars, we put them in a lot of street cars as well. The diff is not directly linked to the wheel and suspension so these are not as affected by bumps and road imperfections. Some additional drivetrain vibration may be felt through the chassis but in our experience it's very minimal. When installing one of our performance differentials make sure you also replace the mounts! And any subframe overhaul should also include solid diff mounts. There's no downside!

Rear Differential Mounts - Turner Solid Aluminum - E46 M3
Rear Differential Mounts - Turner Solid Aluminum - E46 M3
For our Grand-Am Cup E46 M3s we wanted a fully solid diff...
Turner Motorsport - Corporate Logo
T#:338995
Part#: TDR4680035
In Stock
Starting at $152.95
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Starting at $152.95
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Made in the USA For our Grand-Am Cup E46 M3s we wanted a fully solid differential mount setup. The advantages of a fully-solid aluminum set is that they last forever, quickens response in the suspension, and frees up horsepower to the wheels. These fully solid aluminum diff mounts are CNC machined and lightened for a direct replacement of the original rubber pieces.

By substituting aluminum for rubber we can take out all of the deflection and 'wind up' inherent to the original rubber pieces. The high deflection rate of the stock rubber means the suspension reacts slower as the bushing is compressed. The power used to compress that bushing is instead passed straight to the axles and wheels. And since there is no time lost to deflection, response is greatly improved. These diff mounts are only recommended for racecars since the aluminum transfers more noise and vibration.

This is a 3-piece set with a single front bushing and two rear bushings to press into the cover. They mount with the stock BMW hardware.

This item fits the following BMWs:
2001-2006 E46 BMW M3
Rear Differential Mounts - Turner Solid Aluminum - E46/SE46, X3, Z4
Rear Differential Mounts - Turner Solid Aluminum - E46/SE46, X3, Z4 ...
When you're building a track-only car you want th...
Turner Motorsport - Corporate Logo
T#:338996
Part#: TDR4680455
On Order, ETA Feb 25, 2019
Starting at $163.95
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Starting at $163.95
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When you're building a track-only car you want the hardest bushing material allowed under your class rules (or no rules at all). These aluminum differential mounts are as solid as you can get and will eliminate any deflection as the differential transmits torque and moves with the suspension.

Our Delrin/Aluminum kit meets the requirements for certain racing series. But these full aluminum diff bushings go one step further to give you the best response, longest life, and most feedback of any other material. These diff mounts are only recommended for racecars since the aluminum transfers more noise and vibration.

This is a 3-piece set with the two front bushings and one rear bushing. They install with the stock BMW hardware.
Clickhere for installation instructions.

This item fits the following BMWs:
1999-2005 E46 BMW 323i 323ci 325i 325ci 325xi 328i 328ci 330i 330ci 330xi
2001-2006 SpecE46 BMW 330i 330ci
Rear Differential Mounts - Turner Solid Delrin/Aluminum - E46, X3, Z4
Rear Differential Mounts - Turner Solid Delrin/Aluminum - E46, X3, Z...
These Turner Motorsport solid differential mounts were de...
Turner Motorsport - Corporate Logo
T#:338994
Part#: TDR4680002
Ships on May 24, 2019
Starting at $199.95
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Starting at $199.95
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Made in the USA These Turner Motorsport solid differential mounts were designed for our championship-winning Grand-Am E46 330s and they are legal in most racing classes where a fully solid aluminum mount is not allowed. To prevent bushing deflection, these E46 diff bushings use Delrin with an aluminum insert. This keeps the differential locked in place which improves handling, feedback, and transfers more power to the wheels. They also last much longer than any rubber mount. If you're tracking your E46 323, 325, 328, or 330 these diff mounts are an absolute must. They can also be used on street cars if slightly higher levels of noise and vibration can be accepted.

This item fits the following BMWs:
1999-2005 E46 BMW 323i 323ci 325i 325ci 325xi 328i 328ci 330i 330ci 330xi
2001-2006 SpecE46 BMW 330i 330ci
2004-2006 E83 BMW X3 2.5i X3 3.0i
2003-2006 Z4 BMW Z4 2.5i Z4 3.0i

Rear Differential Mounts - OEM/Meyle HD Rubber - E46, X3, Z4
Rear Differential Mounts - OEM/Meyle HD Rubber - E46, X3, Z4 ...
These rubber bushings from Meyle are a direct replacement...
Packaged by Turner - Corporate Logo
T#:339943
Part#: E46-MY-DIFF
In Stock
Starting at $75.85
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These rubber bushings from Meyle are a direct replacement for the stock differential bushings in the E46 3-series, E83 X3 SAV, and Z4 Roadster. If your original bushings are worn (likely around 100,000 miles) these are a great replacement upgrade. The front bushings are the stock OEM type rubber bushings. The rear bushing is a Meyle HD upgrade over stock - about 15% stiffer than the originals. This means the bushing will not flex and twist as much. This puts more power to the wheels since power is no longer used up for 'torquing' the bushing. These are not race bushings; the rubber material is perfectly suitable for street use.

The non-M E46/E83/Z4 models use three differential mounts - two front bushings in the subframe and one rear mount in the diff cover. This set of bushings covers all three. You can opt to include new mounting hardware in the Options list below.

This item fits the following BMWs:
1999-2005 E46 BMW 323i 323ci 325i 325ci 325xi 328i 328ci 330i 330ci 330xi
2004-2010 E83 BMW X3 2.5i X3 3.0i X3 3.0si
2003-2008 Z4 BMW Z4 2.5i Z4 3.0i Z4 3.0si Roadster

E46 Finned Differential Cover Upgrade Kit
E46 Finned Differential Cover Upgrade Kit
The perfect upgrade for any E46, this finned differential...
Packaged by Turner - Corporate Logo
T#:401688
Part#: 33117512980KT
In Stock
$209.58
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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
Performance Differential Cover install kit
Performance Differential Cover install kit
This kit includes Turner Motorsport solid aluminum differ...
Packaged by Turner - Corporate Logo
T#:556968
Part#: 33112282482KT3
On Order, ETA Feb 27, 2019
New Item
$461.84
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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.


E46 M3 Stock Differential Cover With Bushings
E46 M3 Stock Differential Cover With Bushings
BMW does not sell the differential mounts separate from t...
Genuine BMW - Corporate Logo
T#:1333
Part#: 33112282482
In Stock
19% off MSRP $225.44
$181.95
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19% off MSRP $225.44
$181.95
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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

Front Differential Mount Bushing - OEM Rubber - E46 M3, Z4 M
Front Differential Mount Bushing - OEM Rubber - E46 M3, Z4 M ...
When working on the rear subframe, replacement of any rub...
Genuine BMW - Corporate Logo
T#:2215
Part#: 33172282484
In Stock
25% off MSRP $41.14
$30.78
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25% off MSRP $41.14
$30.78
Free Shipping on orders $99 and up
When working on the rear subframe, replacement of any rubber bushings and mounts should be performed. This is the front differential mount bushing and it takes the majority of the torquing motion of the diff when under load. The constant twisting will cause this bushing to wear out pretty fast. This is the Original BMW rubber part.

Applications:
2001-2006 E46 M3, M3 CSL coupe and convertible
2007-up Z4 M Roadster, M Coupe


Genuine BMW Rear Axle Hex Bolt With Washer - M12 1.5x80
Genuine BMW Rear Axle Hex Bolt With Washer - M12 1.5x80
Replace your differential mounting hardware during servic...
Genuine BMW - Corporate Logo
T#:13460
Part#: 33176760337
In Stock
$7.27
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Replace your differential mounting hardware during service to eliminate problems caused by rusted or stripped hardware.

Genuine BMW Dustcover Plate, Large - 31511428659
Genuine BMW Dustcover Plate, Large - 31511428659
Genuine BMW Dustcover Plate, LargeThis item fits the foll...
Genuine BMW - Corporate Logo
T#:55877
Part#: 31511428659
In Stock
16% off MSRP $14.23
$11.90
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16% off MSRP $14.23
$11.90
Free Shipping on orders $99 and up


Genuine BMW Dustcover Plate, Large
This item fits the following BMW Chassis:
E53 48IS,E46,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

IRP Performance Polyurethane Engine and Transmission Mounts - E36 E46
IRP Performance Polyurethane Engine and Transmission Mounts - E36 E4...
Stock mounts are made from soft rubber and are sometimes ...
IRP - Individual Racing Parts - Corporate Logo
T#:401413
Part#: IRPEGS-2
In Stock
$199.95
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Stock mounts are made from soft rubber and are sometimes filled with fluid to give a car the most comfortable ride possible. The soft rubber and fluid helps to reduce the total amount of vibration, noise, and harshness (NVH) that is transferred into the cabin. The problem with this is driveline slop. The stock mounts allow a lot of excess movement and increases the amount of time it takes to transfer power to the wheels.

In order to address this issue, performance mounts can be substituted to reduce the amount of slop and transfer power to the wheel quicker. Two options for this are polyurethane mounts and solid mounts.

Solid mounts are great for an immediate transfer of power but allow for a ton of noise and vibration to be felt and heard in the cabin of the vehicle. This is great for the track where there aren't any issues with excess harshness, but as a daily driver, this can become an annoying pain in the neck.

The best middle ground is Polyurethane. Polyurethane is much stiffer than rubber and gives you the much stiffer feel you may be looking for. This allows for the increase in responsiveness, but isn't so extreme that it transfers all of the sound and vibrations into the cabin. This makes it much more comfortable for daily use while still reinforcing your driveline.

Features:

  • Aluminum and Polyurethane Construction
  • 80A Durometer Rating
  • New Hardware
E46 M3, Z4M Performance Polyurethane Differential Bushing Set
E46 M3, Z4M Performance Polyurethane Differential Bushing Set ...
Worn rubber differential mounts will lead to the differen...
ECS - Corporate Logo
T#:378193
Part#: 002447ECS03KT
In Stock
$111.95
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Worn rubber differential mounts will lead to the differential twisting and shifting around in the rear subframe. Not only will this be noisy but it's bad for driver confidence and bad for the chassis as well. Even on fresh rubber bushings the differential has deflection and twist, especially if the car has been modified for more torque. Since the differential is centrally mounted in the rear subframe, with all suspension mounts interconnected, a differential with too much deflection will affect handling and could even damage the rear subframe.

These 88A urethane E46 M3 diff mounts are much stiffer than stock but still not as solid as our Turner aluminum/Delrin bushings. This set will resist twisting much better than the stock rubber mounts. Included is the front diff mount and two rear mounts in the cover.



E46 non-M Performance Polyurethane Differential Bushing Set
E46 non-M Performance Polyurethane Differential Bushing Set ...
Worn rubber differential mounts will lead to the differen...
ECS - Corporate Logo
T#:378192
Part#: 002447ECS02KT
In Stock
$99.95
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Worn rubber differential mounts will lead to the differential twisting and shifting around in the rear subframe. Not only will this be noisy but it's bad for driver confidence and bad for the chassis as well. Even on fresh rubber bushings the differential has deflection and twist, especially if the car has been modified for more torque. Since the differential is centrally mounted in the rear subframe, with all suspension mounts interconnected, a differential with too much deflection will affect handling and could even damage the rear subframe.

These 88A urethane E46 diff mounts are much stiffer than stock but still not as solid as our Turner aluminum/Delrin bushings. This set will resist twisting much better than the stock rubber mounts. Included are the two front diff mounts and the rear mount in the cover.

IRP Performance Solid Engine and Transmission Mounts - E30 E36 E46
IRP Performance Solid Engine and Transmission Mounts - E30 E36 E46 ...
Stock mounts are made from soft rubber and are sometimes ...
IRP - Individual Racing Parts - Corporate Logo
T#:401414
Part#: IRPEGS-1
In Stock
$182.95
Free Shipping

Stock mounts are made from soft rubber and are sometimes filled with fluid to give a car the most comfortable ride possible. The soft rubber and fluid helps to reduce the total amount of vibration, noise, and harshness (NVH) that is transferred into the cabin. The problem with this is driveline slop. The stock mounts allow a lot of excess movement and increases the amount of time it takes to transfer power to the wheels.

In order to address this issue, performance mounts can be substituted to reduce the amount of slop and transfer power to the wheel quicker. Two options for this are polyurethane mounts and solid mounts.

The middle ground is Polyurethane. Polyurethane is much stiffer than rubber, but these still let a large amount of movement in comparison to solid mounts. These are great for sporty, aggressive street driving, but for the track are not ideal.

For the track, solid mounts are great. Solid mounts give you an immediate transfer of power, at the cost of increase NVH. This is great for the track where comfort is the least of your worries and power is all that is important.

Features:

  • Aluminum and Polyurethane Construction
  • 80A Durometer Rating
  • New Hardware
Meyle Heavy Duty Rear Differential Mount - E46, E83 X3, E85 Z4
Meyle Heavy Duty Rear Differential Mount - E46, E83 X3, E85 Z4 ...
This is the rear rubber-isolated differential mount. The ...
Meyle HD - Corporate Logo
T#:186967
Part#: 33176751808MY
In Stock
$19.99
Free Shipping on orders $99 and up

This is the rear rubber-isolated differential mount. The diff mounts take the bulk of the twisting and binding as power is transmitted through the differential. We use a Meyle HD rubber bushing for the rear mount as it's stronger than the factory part. (33176751808). We also recommend replacing the front differential mount 33171093175MY at the same time.

Meyle is a German brand in business since 1958 and all of their products are TUV approved and meet or exceed ISO standards. Heavy Duty components are designed to provide significantly long lifespans than other aftermarket and stock OE components. Each part includes a 4 year warranty.

As a leading source of high performance BMW parts and accessories since 1993, we at Turner Motorsport are honored to be the go-to supplier for tens of thousands of enthusiasts the world over. With over two decades of parts, service, and racing experience under our belt, we provide only quality performance and replacement parts. All of our performance parts are those we would (and do!) install and run on our own cars, as well as replacement parts that are Genuine BMW or from OEM manufacturers. We only offer parts we know you can trust to perform!

This item fits the following BMWs:
1999-2005 E46 BMW 323i 323ci 325i 325ci 325xi 328i 328ci 330i 330ci 330xi
2004-2005 E83 BMW X3 2.5i X3 3.0i
2003-2006 E85 BMW Z4 2.5i Z4 3.0i