1 1

Performance M

Genuine M Performance Limited Slip Differential (LSD) - M140i, M240i, 340i , 440i, M135i, M235i

Genuine M Performance Limited Slip Differential (LSD) - M140i, M240i, 340i , 440i, M135i, M235i

£1,745.00
£1,745.00
Sale Sold out
Shipping calculated at checkout.
Choose model

Heads-up on cancellations & returns: if you cancel an order or return an item, you won't get back 100% of what you paid. We apply a 10% restocking fee, the outbound shipping is non-refundable, and we have to pass on Shopify / PayPal payment processing fees; these aren't returned to us when we refund you. International orders also lose on exchange-rate spread in both directions. If the original packaging is damaged or missing, a reboxing charge applies. For international orders specifically, if you refuse to pay our shipping invoice or supply a prepaid label after placing the order, the same deductions apply. We're upfront about this — please be sure of your purchase before ordering.

Unlock real-world grip and confidence for your BMW 1, 2, 3 and 4 Series

Upgrade your rear drivetrain with the genuine M Performance rear differential and experience sharper corner exits, reduced wheelspin and composed handling in wet or dry conditions. This clutch type mechanical unit actively shares drive between both rear wheels, delivering power to where it can be used. The result is faster traction on tight bends, greater stability under throttle and a more connected, driver focused feel on road and track.

Why enthusiasts choose this OEM rear diff upgrade

  • Real traction gains for fast road and track days
  • Smoother power delivery out of hairpins and roundabouts
  • More predictable handling and improved corner exit speed
  • Helps reduce inside wheel spin and traction control intervention
  • Factory quality, precision built and designed to integrate seamlessly
  • Keep your original unit for future refit or resale value

Compatible BMW models

Designed for six cylinder petrol models including:

M140i, M240i, 340i, 440i, M135i, M235i

Ideal search terms customers use for this upgrade: BMW 1 Series LSD, BMW 2 Series LSD, BMW 3 Series LSD, BMW 4 Series LSD, rear diff upgrade, LSD retrofit, performance differential, F20 F21 F22 F23 F30 F32 rear axle, B58 N55 limited slip conversion, final drive upgrade.

Genuine component, warranty friendly

This is an original BMW part from the M Performance range. As an OEM accessory, it is engineered for reliability and integration, and the manufacturer warranty remains in effect. You can also retain your factory differential for future use.

Fitting and support

Professional installation available at MJ Modifications in Warwickshire. Our team has fitted these units for customers who consistently report a night and day improvement in traction, composure and driving enjoyment. To request a fitting quote or advice, email info@mjmodifications.co.uk.

Delivery information

Special delivery item with fixed shipping cost of £80 to UK mainland due to size and weight. Addresses outside mainland UK will incur additional shipping charges.

Key benefits at a glance

  • OEM limited slip unit for serious grip and control
  • Enhanced stability under power in all conditions
  • Perfect for spirited driving, track days and fast road use
  • Direct-fit upgrade for listed models
View full details