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3.46 Differential for E46 3 Series and Z4
(more info)
3.46 Differential for E46 3 Series and Z4. This is a factory BMW differential with a 3.46 ratio. A perfect addition to this unit would be the TMS Limited Slip Unit, see link below. $100 core charge applies. |
| Part #: 33107531625
(33-10-7-531-625)
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| Price: $1,499.95 (USD) |
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3.64 Differential for E46 3 Series and Z4
(more info)
3.64 Differential for E46 3 Series and Z4. This is a factory BMW differential with a 3.64 ratio. A perfect addition to this unit would be the TMS Limited Slip Unit, see link below. $100 core charge applies.
This item fits the following BMWs:
1999-2005 E46 BMW 323i 323ci 325i 325ci 328i 328ci 330i 330ci
2003-2008 E85 BMW Z4 2.5i Z4 3.0i Z4 3.0si
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| Part #: 33107514198
(33-10-7-514-198)
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| Price: $1,399.95 (USD) |
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Custom Differential for E46/E39/Z4 6 cylinder (non-M)
(more info)
We offer a wide variety of differential options for the E46 3 series 6 cylinder (except M3), E39 6 cylinder, and Z4 (non-M). From a simple rebuild of your current differential, to high end variable ramp limited slip options for the serious racer.
How does this work? It's easy. We will build your custom differential, which will be shipped directly to you. As an option, we can also rebuild your current diff, keeping the same ratio, but allowing you to upgrade to limited slip (or change your current limited slip unit). All new/rebuilt differential includes an $800 core charge. You can then send us your old/stock differential as a core -- Factory open diffs (non limited slip) are elligible for the full $800 credit. All custom diffs receive the same $800 core charge. Cores must be sent to us within 15 days or receiving your rebuilt core. Sorry, no returns on custom built differentials.
Customizing your rebuilt differential has never been easier. Simply select your options below. The base price includes a rebuilt open differential with your current gearing and gear set (no change in ratio). If you would like a custom ratio change, and/or a limited slip differential (LSD) unit added, simply choose your options below.
Select your options below to customize your E46/E39/Z4 (6 cyl non-M) diff. |
| Part #: E46-DIFFERENTIAL |
| Price: $1,195.00 (USD) |
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Differential Cover Gasket - E46 ** DISCONTINUED (read info)
(more info)
This is the (now discontinued) differential cover gasket / diff seal for E46 3 series, 1999-2005. BMW has discontinued this part, and now recommends using RTV silicone for sealing the differential cover. We have found the RTV works better as well.
This part is NO LONGER AVAILABLE (NLA).
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| Part #: 33121214719
(33-12-1-214-719)
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E46 High Performance Finned Differential Cover
(more info)
E46 High Performance Finned Differential Cover. Finned for better cooling, this is the perfect addition to your E46 differential, espeically if you are running an LSD unit or if the car sees any track use. This is a direct bolt on. |
| Part #: 33117512980
(33-11-7-512-980)
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| Price: $134.95 (USD) |
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E46 M3 Custom Built Limited Slip Differential (LSD)
(more info)
We offer a wide variety of differential options for the 2001-2006 E46 M3, from a simple rebuild of your current factory M3 differential, to high end variable ramp limited slip options for the serious E46 M3 racer.
How does this work? It's easy. We will build your custom differential, which will be shipped directly to you. Your new/rebuilt differential includes a core charge. You can then send us your old/stock E46 M3 M Variable differential as a core for a full credit. All custom diffs receive the same core charge. Cores must be sent to us within 15 days or receiving your rebuilt core. Sorry, no returns on custom built differentials.
Customizing your rebuilt differential has never been easier. Simply select your options below. The base price includes a rebuilt Factory M-Variable LSD differential with your stock 3.62 gear set. If you would like an improved limited slip (LSD) unit, and/or a custom gear ratio, simply choose your options below.
Select your options below to customize your E46 M3 diff. |
| Part #: E46-M3-DIFFERENTIAL |
| Price: $1,295.00 (USD) |
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E46 M3 Outer CV Boot Housing Rebuild Kit
(more info)
 Over the years driving and racing the E46 M3 in Grand-Am racing, club racing, driving school events, and street driving, we have found that the half-shafts need to be rebuilt or replaced often. This is especially true of the outer CV joint (closest to the wheel bearing) due to the high loads on the half shafts and elevated temperature in that region. Thanks to our extensive experience in Grand-Am endurance racing, we have designed a kit to prolong CV joint life and save frequent and costly replacing of half shafts, on both street and track/race cars. The problem with rebuilding E46 half-shafts is that the CV joint ("Constant Velocity Joint") closest to the wheel bearing is not serviceable because a stamped steel housing must be cut off to access the CV joint. The housing cannot be reused, therefore necessitating replacement of the whole half-shaft. We have designed a reusable aluminum housing to make servicing the CV joint possible.
This is a custom Turner Motorsport item, originally designed for our championship-winning Grand-Am M3s. It can also be used in non-racing applications, for both track and street E46 M3s. If you are performing any work on the rear driveline of your E46 M3 (such as wheel bearings, differential work, bushings, rear sway bar / swaybar, etc) or are prepping for the race season, then now is an excellent time to perform this job as well.
Kit includes 2 CNC aluminum housings (left and right are the same) with Black anodized coating, 12 set-screws (6 per housing), 2 Viton O-rings, 8 Oetiker clamps, and 4 stainless steel breather tubes (only required for race use).
 click for intructions (PDF)
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| Part #: TDR4628CVJ |
| Price: $189.95 (USD) |
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E46 M3 Stock Differential Cover With Bushings
(more info)
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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| Part #: 33112282482
(33-11-2-282-482)
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| Price: $159.95 (USD) |
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E46 M3, Z4 M Stock Front Differential Mount Bushing
(more info)
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
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| Part #: 33172282484
(33-17-2-282-484)
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| Price: $29.95 (USD) |
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E46 Small Differential Drive Shaft Spacer
(more info)
For the American market, BMW supplied the E46 with one size for the differential, whereas in Europe there were two sizes (large and small, depending on the model). The American market got the large differential casing along with a driveshaft that cannot be interchanged with the small differential. Many racing teams prefer to use the small diff because of its lighter weight and greater selection of gear ratios. This poses a problem for racecars in the US market because not only did you have to buy a diff, you also had to buy the matching driveshaft (from the Euro 320i). Turner Motorsport ran into this scenario a lot during our World Challenge campaign and our solution was to machine an aluminum spacer to adapt the stock, large-style driveshaft to the small diff. We now offer this part for sale to other builders. Using this part will save time and money and keep the parts on the car standardized (no need to order a spare driveshaft from Europe.) This spacer is for a 4-bolt universal-joint style driveshaft and matching 4-bolt input differential flange only. This was found mostly on the early-E46 but at some point BMW switched over to a CV Joint style flange. We don’t know for sure when this was done so on car made 2001 or later, we suggest you check the rear flange. Neither of the differentials supplied in street BMWs had limited slip, but BMW Motorsport did make a racing limited slip unit using the small differential as a basis (it’s expensive which is why we came out with our own). At this point there are aftermarket limited slip differentials for both the small and large differentials (including the TMS LSD unit mentioned above). This driveshaft spacer will work with any of them installed in the small diff with the 4-bolt flange. Currently, this part only applies to 5-speed cars. It is not for a car with the 6-speed transmission. |
| Part #: TDR4620R23 |
| Price: $139.56 (USD) |
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Genuine BMW Performance Differential - E46 330i, 330ci 2001-2006
(more info)
Add a performance differential with a shorter final drive ratio (3.07 instead of 2.91), and your 3 Series will enjoy added punch for quicker acceleration out of corners and in general, a more aggressive power delivery.
For vehicles with manual transmission and without option "Performance Package" from 9/2000 forward.
This item fits the following BMWs:
2001-2005 E46 BMW 330i 330ci
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| Part #: 33107508099
(33-10-7-508-099)
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| Price: $1,401.00 (USD) |
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OS Giken Limited Slip Differential Fluid - 80w-250 - 1 liter
(more info)
The OS Giken Super Lock LSD Gear Oil 80W-250 1 Liter FR is the OS Giken's very own special blend of gear oil which does an excellent job of lubricating and protecting your Super Lock LSD from failure. Through use of this high quality liquid, your Super Lock LSD will last much longer if regular oil changes are performed.
Type: FULL SYNTHETIC
SAE: 80W-250
API: GL-5
Flash point: 208℃
Viscosity: 320.5（40℃）, 43.7（100℃）
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| Part #: OS250R |
| Price: $49.95 (USD) |
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OS Giken Super Lock Limited Slip Differential Unit for E46 325/328/330, E90 325i/330i - E39 6 Cyl
(more info)
The stock differential of the non-M model E46 only puts power to one wheel -- this just won't cut it! Upgrading to a limited slip differential means power to BOTH wheels, for better lauch, acceleration, and track handling. Fits non-M E46 models, including 1999-2000 323i, 323Ci, 328i & 328Ci and 2001-2005 325i, 325ci, 330i & 330ci (not for 3.07, 2.93 or any ratios lower than 3.15). We're excited to be carrying the OS Giken LSD unit in our performance catalog, as we've used their products on our own Championship winning E46 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 but oil should be changed after 1800 miles with regular fluid service after that. Super smooth and quiet engagement, and 100% progressive locking capability. Professional installation is recommended (requires minor trimming of differential case).
This Limited Slip Differential Unit fits the following BMWs:
1999-2000 E46 3 Series 323i, 323Ci, 328i & 328Ci
2001-2005 E46 3 Series 325i, 325Ci, 330i & 330Ci
2006-2006 E46 3 Series 325Ci & 330Ci
2006-2011 E90 3 Series 325i 330i - Sedan - Automatic Transmission
1997-2003 E39 5 Series 525i 528i 530i - Automatic Transmission
2004-2005 E60 5 Series 525i - Automatic Transmission
2004-2005 E85 Z4 Z4 3.0i - Automatic Transmission
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| Part #: BM235-HA |
| Price: $1,794.95 (USD) |
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OS Giken Super Lock Limited Slip Differential Unit for E46 M3, E34 M5, E39 M5, MZ4
(more info)
The limited slip unit on the E46 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 E46 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 E46 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
1991-1995 E34 M5 sedan
1999-2003 E39 M5 sedan
2006-2008 E85 Z4M Z4 M Coupe, Z4 M Roadster |
| Part #: BM237-HA |
| Price: $2,079.95 (USD) |
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Ring & Pinion Gear Set (R&P only) - 3.91 or 4.10 - E46 M3, E60 M5, E63 M6
(more info)
Hands down - one of the best performance upgrades you can make to an E46 M3, E60 M5 or E63/E64 M6! With almost no downside you can make your BMW much quicker by swapping in a new ring & pinion gear set. The R&P acts as a torque multiplier, getting you into the power band quicker in each gear. There is an 8% increase in torque at the wheels with the shorter R&P. Want to make your car faster off the line or out of corners? This is what you need. **Note - the 4.10 is the "new" version from BMW motorsport - it is shot peened and hardend by the manufacturer for increased strength.
This item is the genuine BMW part and the ring & pinion set only. You will need to have this professionally installed into your existing differential. We also offer built differentials and exchanges, click
here.
This item fits the following BMWs:
2001-2006 E46 BMW M3, M3 Convertible
2004-2010 E60 BMW M5 - use 3.91 for SMG cars. 4.10 for manual transmission only
2004-2011 E63 BMW M6 M6 Convertible - use 3.91
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| Part #: E46M3RP |
| Price: $699.95 (USD) |
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Differential
