Quaife QDF14N BMW 188L ATB Helical Gear LSD

In Stock
ex vat
Regular price £833.33


  • Type Helical Gear Limited Slip Differentials
  • Brand Quaife
  • MPN QDF14N
  • Sizing Chart Download
  • Quaife Automatic Torque Biasing (ATB) limited slip differential
  • Compatible with traction control and ABS systems
  • Controlled power supply to driven wheels
  • Direct replacement for factory diff
  • Backed by a Quaife lifetime warranty

Medium case 188mm (29.5mm offset) 10 bolt crown wheel differential

Suitable For:

  • E81 118d manual
  • E82 120d manual
  • E87 116d manual; 120d auto up to 01/2007; 120d manual
  • E46 320d auto; 320d manual (2.79:1 ratio); 323i manual; 328i; 330i manual; 330xd
  • E90 318d; 320d manual (7566218 & 7566274 diff); 325d; 330d; 325i manual (7566172 diff); 330dx auto
  • E92 320d; 325d; 330d; 325i manual (7519942 diff); 330dx auto
  • E39 520d manual; 525d auto; 525i manual; 528i manual; 530i manual; 535i; Alpina B10 3.2 manual (2.93:1 ratio) / Alpina B10 3.3 manual
  • E60 520d manual; 525d auto after 03/2007; 530i manual
  • E83 X3 3.0d manual rear axle
  • F25 X3 SDrive 2.0d rear axle
  • E53 X5 3.0d manual rear axle
  • E85 Z4 2.2i manual; 3.0i manual; 3.0i SMG

Quaife Helical LSD's - How They Work

Often imitated but never improved, the Quaife Automatic Torque Biasing (ATB) limited slip differential is the perfect traction solution that delivers noticeable performance benefits on any car using a factory ‘open’ differential unit

Once installed, drivers will notice an immediate difference, as the Quaife (ATB) limited slip differential automatically biases the torque across the axle to the wheel with the most grip. Unwanted wheelspin and slip are greatly reduced, resulting in less understeer on the front or four-wheel drive machines and reduced oversteer on rear-wheel drive vehicles. Rear-wheel drive cars with a Quaife limited slip differential become more controllable during oversteer moments, enabling drivers to exploit the full potential of their machines for the first time, leading to a more exciting, rewarding and rapid driving experience

Fully compatible with manufacturer electronic traction control and anti-lock braking systems, the Quaife ATB differential offers a number of key advantages in both functionality and service life compared to conventional plate-style LSD units

The Benefits Are:

  • Safe, progressive and seamless in action, the Quaife ATB differential never ‘locks’
  • Controlled power is transmitted to all driven wheels, to maximise traction and minimise wheelspin, particularly in slippery conditions
  • Fitment greatly reduces unwanted torque steer, understeer or oversteer
  • Designed to work in harmony with road car electronic stability and traction control programs
  • Improves braking performance on front-wheel drive cars by reducing lock-up and minimising ABS intrusion due to torque transfer action
  • Reduces tyre wear, especially on front-wheel drive cars
  • Gear operated with no service components to replace – ever
  • Direct replacement for factory standard ‘open’ differential unit
  • Retains normal axle lubrication systems and maintenance schedule
  • Over 100,000 units sold worldwide since the 1980’s
  • Available for over 400 different applications
  • Backed by a Quaife lifetime warranty for both motorsport and road use

Designed for Motorsport use, no instructions included