Burger Motorsports Rear Diff Mount Brace Kit for BMW E82 E88 E90 E93 135i 335i 335xi xDrive 335d 335is – Differential Support/Carrier Bracket, Anti Wheel Hop, Subframe Reinforcement (Small/Large Case) BMS148 BMS149 | E8x E9x

Rear Diff Mount Brace Upgrade for BMW E82 E88 E90 E93 by Burger Motorsports

After stronger launches, sharper rear-end control and less squirm under power on your BMW 1 Series or 3 Series. This Burger Motorsports rear diff support bracket is the drivetrain reinforcement that stops tramp and calms the back of the car when you put torque down hard. It ties the rear differential housing to the subframe to curb movement, translating more power into forward motion with a planted, confidence-inspiring feel on fast road and track.

Built from heavy-gauge steel as a single-piece assembly, it avoids the weak points of multi-part designs and uses stainless fasteners for long-term reliability. The stealth, no-logo finish keeps an OEM-plus look while quietly delivering a big step up in traction and stability. We have installed these on our own builds and for customers, and the feedback has been consistently positive for launch consistency, rear-end composure and overall drivability.

Why this rear diff brace is a must-have

• Fixes axle tramp and wheel hop for faster, cleaner getaways
• Reduces differential movement and keeps the pinion aligned under load
• Improves straight-line grip and rear chassis rigidity
• One-piece precision construction for maximum strength
• Heavy-duty steel with stainless hardware for durability
• Discrete appearance for an OEM-plus finish
• Direct bolt-on upgrade using standard tools
• Made in the USA by Burger Motorsports

Vehicle applications and sizing

Compatible with BMW 1 Series E82 E88 and 3 Series E90 E93 models listed below. This kit is offered for small-case and large-case differentials. Please confirm your differential casing size before ordering.

BMW 135i

• 135i Manual transmission - large-case brace
• 135i Automatic transmission - small-case brace
• 135i DCT transmission - large-case brace

BMW 335i, 335xi xDrive, 335d

• 335i Manual transmission - large-case brace
• 335i 335xi Automatic Aug 2006 to Aug 2007 - large-case brace
• 335i Automatic Sep 2007 onward - small-case brace
• 335d - large-case brace

BMW 335is

• 335is Manual transmission - large-case brace
• 335is DCT transmission - large-case brace

Note Some years and trims left the factory with either a small or large rear differential. Check before purchase.

Part numbers

• BMS148 - Small differential
• BMS149 - Large differential

What you get

• Burger Motorsports rear diff support bracket
• Stainless steel mounting hardware

Perfect for

• BMW launch improvement and 60 ft gains
• Wheel hop reduction on tuned E8x and E9x platforms
• Drag strip use and track days
• Daily drivers wanting better traction and rear-end stability

Installation

Straightforward, DIY-friendly fitment with normal hand tools. Step-by-step instructions here: BMS Diff Brace Installation Guide.

Professional fitting

Prefer expert installation. Book with MJ Modifications in Warwickshire. Request a quote at info@mjmodifications.co.uk.

Compatibility check before dispatch

To ensure the correct part for your vehicle, we will verify fitment before shipping using your UK registration or the last 7 of your VIN. Add your details at checkout.

Search-friendly terms

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