BMW - LSD conversion set

• No metal shavings issue – friction discs protect internal parts and improve durability.
• Top-grade tool steel construction – heat-treated and nitrided for long service life.
• ZF-inspired progressive locking design – smooth in normal driving, aggressive under load.
• Easy Mount version – no need for spider gear machining during standard installation.

Unlike many cheap alternatives, RacingDiffs focuses on both durability and real-world performance, making this one of the most advanced LSD conversion kits available.

The Progressive LSD Conversion Kit uses ramp-angle geometry inspired by plated ZF differentials. This allows the differential to remain smooth and civil during everyday driving, while progressively increasing lock under load.

• Reduced one-wheel spin
• Improved traction on acceleration
• Better corner exit stability
• More confidence in spirited driving

BMW 168 mm Differential (Small Case)

Popular applications:

• BMW E30 316i, 318i, 318is
• BMW E36 316i, 318i, 318is
  
• BMW Z3 1.8i, 1.9i

BMW 168K Differential – BMW E46 up to 320d, Z4 E85 2.2i

Popular applications:

• BMW E46 316i, 318i, 320i.
• BMW X3 E83 2.5i M54
• BMW Z4 E85 2.2i M54

BMW 188 mm Differential – BMW E30, E36, E34, E32, Z3 with 6 cylinder engines

Popular applications:

• BMW E30 320i, 323i, 325i
• BMW E36 320i, 323i, 325i, 328i
• BMW E34 520i, 525i, 530i/535i M30,
• BMW E32 730i/735i M30
• BMW Z3 2.5i, 2.8i. 3.0i

BMW 188K Differential – E46, E39, E38 6 cylinder, 

Popular applications:

• BMW E46 320d, 323i, 325i, 328i, 330i
• BMW E39 520d, 520i, 523i, 525i, 525d, 528i, 530i
• BMW E38 (pre LCI) 725tds, 728i

BMW 188L Differential – BMW E8X, E9X pre LCI, Z4 E85

(up to September 2007)

Popular applications:

• BMW E81/E82/E87/E88 120d, 123d, 125i, 128i, 130i, 135i (Automatic)
• BMW E90/E91/E92/E93 320d, 323i, 325i, 328i, 330i, 335i (Automatic)
• BMW E60 525i, 530i
• BMW Z4 E85 2.5i, 3.0i

BMW 188LW Differential – BMW F20, E9X LCI, F30

(after September 2007)

Popular applications:

• BMW E81/E82/E87/E88 120d, 123d, 125i, 128i, 130i, 135i (Automatic)
• BMW E90/E91/E92/E93 320d, 323i, 325i, 328i, 330i, 335i (Automatic)
• BMW E60 525i, 530i
• BMW Z4 E85 2.5i, 3.0i
• BMW F20/F21 125i, M135iX
• BMW F22/F23 220d, 228i, M235iX
• BMW F30/F31/F34/F35 320d, 328i, 330i, 335i (Automatic), 335iX, 340iX
• BMW F32/F33/F36 420d, 420i, 428i, 428iX, 430i, 435iX, 440iX

BMW 210 mm Differential – E34, E32, E38, E31, V8 & V12 

Popular applications:

• BMW E34 535i, 540i
• BMW E32 735i, 740i, 750i
• BMW E38 (pre LCI) 740i
• BMW E31 840i, 850i

BMW 215K Differential – BMW E46 330d, E39 530d

Popular applications:

• BMW E46 330d
• BMW E39 530d, 540i
• BMW E60 (pre LCI) 530d, 535d, 540i, 545i, 550i
• BMW E63 645i, 650i
• BMW E38 (pre LCI) 730d, 740i, 750i
• BMW E65 730d, 735i, 740i, 745i, 750i
• BMW X5 E53 3.0i, 3.0d, 4.4i, 4.8is

BMW 215L Differential – E8X & E9X N54 & N55

(Up to September 2007)

Popular applications:

• BMW E82/E88 135i N54 & N55 manual
• BMW E90/E91/E92/E93 325d (manual), 330d, 335d, 335i (Manual)

BMW 215LW Differential – F20, F30, F32

(after September 2007)

Popular applications:

• BMW E82/E88 135i N54 & N55 manual
• BMW E90/E91/E92/E93 325d (manual), 330d, 335d, 335i (Manual)
• BMW F20/F21 M135i N55
• BMW F22/F23 M235i N55
• F30/F31 330d, 335d, 335i
• F32/F33/F36 425d (Manual), 430d, 435i, 440i B58

If you are unsure which BMW LSD conversion kit fits your vehicle, check our BMW differential identification video or send us the last 7 digits of your VIN. We'll identify the correct differential and recommend the right kit.

1. Z4 and X3 often use 188L / 168L differential type, although the catalog may show 188K / 168K.
2. Many BMW models produced after 2008 use 188LW / 215LW, although catalogs may show 188L / 215L.
3. BMW E36 Compact production year 2000 often uses 188K, although the catalog may simply show 188mm.

• Inspect the inner surface of the small spider gears before installation. The surface must be smooth and undamaged.
• If the surface is worn, it should be machined for proper operation and durability.
• BMW models produced after 2008 often have a welded ring gear. For aftermarket LSD installation, including RacingDiffs, the ring gear must be machined off the carrier unit.

Watch more installation tutorials in our Video Gallery.

• No need for spider gear machining in standard applications
• Includes all essential installation components
• Designed for straightforward installation

RacingDiffs recommends Ravenol Racing 75W140 oil for all products.

Watch installation tutorials in our Video Gallery.

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