MFactory Helical Limited Slip Differential (Torsen LSD) for BMW E82 E88 E90 E91 E92 E93 E89 F20 F21 F22 F23 F30 F31 F32 F33 - Fits 135i 335i 335d M135i M235i 435i Z4 35i - MF-TRS-05E92

MFactory ATB Gear-Type Limited Slip for BMW 1 Series, 3 Series, 4 Series and Z4

Unlock real traction and put every bhp to the tarmac with the MFactory automatic torque biasing differential. This gear-driven limited slip transforms how your BMW drives out of bends, delivering clean power-down, crisp throttle response and confidence when it is wet or bumpy. Road car, track toy or drag build, this upgrade eliminates that inside-tyre spin and gives you repeatable performance lap after lap. We run these units on our own cars and our customers call the difference night and day.

What you get

• Gear-type ATB design for seamless torque transfer and superb grip on corner exit
• No clutches to wear, no chatter, no special friction modifiers needed
• Smooth, quiet behaviour on the street with rock-solid stability for circuit, sprint, drift and strip
• Second-generation unit that is lighter, stronger and more efficient than typical torque-biasing diffs
• Reduces drivetrain losses so more power reaches the road

Engineering you can trust

• Precision machined from premium Japanese SAE 4320 and SAE 9310 steels
• Forged, double tempered and deep cryogenically treated for exceptional toughness
• Advanced shot peening on critical components for long service life
• Designed with 3D CAD and FEA to optimise gear geometry and load distribution
• High quality Brighton-Best fasteners

Real-world gains

By automatically biasing torque to the tyre with grip, this ATB diff cures one-tyre-fire and inside wheelspin, sharpens turn-in, stabilises the car under power and lets traction control work more effectively. Expect harder launches, stronger mid-corner to exit acceleration and better consistency in changeable conditions. If you ever lift a wheel, a light left-foot brake can help send torque across.

Vehicle coverage and notes

This unit suits popular BMW applications including 1 Series E82 E88 135i, 3 Series E90 E91 E92 E93 335i and 335d, Z4 E89 35i and F-chassis M135i, M235i, 335i and 435i. Check the installation notes below for models that need machining or a bolted final drive conversion.

E chassis

• 1 Series E82 E88 2007 to 2013
  • 135i MT or DCT - ring gear machining required
• 3 Series E90 E91 E92 E93
  • 335i and 335d 2005 to 2007 automatic - direct type fitment
  • 335i and 335d 2007 to 2013 manual or DCT - new bolted final drive gears required
  • 335d March 2007 to 2013 automatic - new bolted final drive gears required
• Z4 E89
  • 35i 2009+ manual - ring gear machining required

F chassis

• 1 Series F20 F21 2012+
  • M135i manual - ring gear machining required
• 2 Series F22 F23 2012+
  • M235i manual - ring gear machining required
• 3 Series F30 F31 2012+
  • 335i manual - ring gear machining required
• 4 Series F32 F33 2012+
  • 435i manual - ring gear machining required

Important: models with a factory welded ring gear need either professional machining of the OE ring gear to accept this differential or conversion to a new bolted ring and pinion set. See notes above for affected cars.

Fitting

Professional installation is recommended, especially where ring gear machining or a bolted conversion is required. For expert fitting in the UK, choose MJ Modifications in Warwickshire and request a quote via info@mjmodifications.co.uk.

Warranty and guarantees

• Feel The Torque 30 day money back guarantee. If you do not feel the difference, return within 30 days for a refund of the product price excluding shipping
• Lifetime, globally transferable warranty for street, strip and track use

Part number

MF-TRS-05E92

We check compatibility before dispatch

To ensure you receive the correct unit, add your UK registration number or the last 7 digits of your VIN at checkout and we will confirm fitment before shipping.

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