
Genuine BMW M Performance Underbody Chassis Brace Kit – F20 / F21 / F22 M135i & M140i
The genuine BMW M Performance underbody chassis brace kit increases structural rigidity across the front subframe, reducing flex and improving steering precision, stability and overall chassis response. Originally developed for M Performance models, this bolt-on upgrade delivers sharper handling and a more planted front end during fast road and track driving.
Fitment: BMW F20 / F21 / F22
SKU: 51712284606
Key Features
Increased Front-End Chassis Rigidity
– Reinforces the front subframe area
– Reduces chassis flex under load
– Improves steering accuracy and feedback
Genuine BMW M Performance Component
– Factory engineered and tested
– OEM fit and finish
– Corrosion-resistant construction
Direct Bolt-On Upgrade
– Uses existing factory mounting points
– No drilling or modification required
– Perfect OEM+ retrofit for non-braced cars
Benefits
– Sharper turn-in and improved front-end response
– Increased stability during hard cornering
– More connected and precise driving feel
Fitment
– BMW M135i F20 / F21
– BMW M140i F20 / F21
– BMW M235i F22
– BMW M240i F22
– BMW 220i / 228i / 230i F22 (retrofit upgrade)
Installation Notes
– Direct bolt-on installation
– Torque bolts to BMW specification
– Ideal upgrade alongside suspension modifications
About BMW M Performance
BMW M Performance parts are developed using motorsport engineering to enhance handling, rigidity and driver feedback while maintaining full OEM quality and reliability.

