MMR Machined Aluminum Differential Inserts for BMW 1 Series, 2 Series, 3 Series, 4 Series (2011-2019)

MMR Billet Differential Inserts For BMW

Our MMR Performance differential bush insert kit for the BMW F-Series (F2x and F3x) is designed to limit movement in the factory differential mounts and maintain proper suspension geometry when cornering. Installation is a breeze, can be carried out in under an hour and is completely reversible.

By filling the small voids in the three factory mounts and limiting vertical movement, our inserts eliminate the associated slop to ensure a more refined and connected driving experience, especially when driving at the limit. The billet aluminium parts will not wear out over time and provide a lasting performance upgrade.

BMW F2x and F3x chassis use rubber rear differential mounts that deflect under load, leading to a disconnected feeling in the rear end, as well as sub-optimal suspension geometry and increased understeer. These precision machined aluminum inserts are designed to fill the voids in the factory rear differential mounts and limit subframe movement without sacrificing ride comfort or introducing any noticeable additional NVH into the cabin. The result is a more refined and connected driving experience, as well as increased efficacy of rear sway bar upgrades and aftermarket suspension components.

Features

CNC machined 6061-T6 aluminum.

Fills the void in the OEM differential rubber bushes.

No additional NVH transferred to the vehicle interior.

Easy installation with no need to remove subframe or differential.

Reduces rear differential movement during launch and acceleration.

Helps to maintain correct suspension geometry under dynamic loads.

Additional Information

Concerned about noise? NVH is a measure of how much Noise, Vibration, and Harshness is transmitted into the vehicle cabin. Based on user feedback, the MMR inserts transmit very little, if any, NVH into the cabin. NVH is subjective, so some users may perceive an increase or decrease in NVH from our rating. If you experience higher NVH than claimed with this product, please review the installation to ensure the components are correctly installed.

Installation Information

These inserts were subject to extensive in-house and independent BMW enthusiast testing prior to release across several F2x and F3x vehicles. Our differential inserts are compatible with diesel, petrol, manual and automatic variants.

Vehicle compatibility

Series

1 Series

2 Series

3 Series

4 Series

Chassis code

F20

F21

F22

F23

F30

F31

F32

F34

Model Year

2011 - 2019

Model variant

All model variants

Engine code

All engine codes