Burger Motorsports (BMS) BMW F-Chassis Rear Differential Support Brace/Bracket Diff Mount - F20 F21 F22 F23 F30 F31 F34 F35 F32 F33 F36 - RWD & xDrive - BMS163 BMS164 BMS165

Rear axle stability upgrade for BMW F-Series 1 2 3 4

Unlock cleaner launches, stronger traction and a more planted rear end with this proven rear differential stabiliser from Burger Motorsports. This one-piece heavy-gauge steel reinforcement ties the rear diff housing to the subframe to control deflection under load, cutting axle tramp and helping the car put power down far more effectively on both rear wheel drive and xDrive models.

If you are chasing quicker getaways, sharper throttle response out of corners and a more confidence-inspiring rear chassis, this is the drivetrain support you want. We have installed this kit on multiple customer F-Series cars and the feedback is consistently positive, with a firmer, more connected feel and a big reduction in wheel hop.

Why enthusiasts choose this differential reinforcement

• Connects differential to the rear cradle to limit movement under torque
• Reduces wheel hop for cleaner, quicker launches and better traction
• Helps relieve stress on diff bearings during hard acceleration
• One-piece construction for maximum strength and precise alignment
• All fixings included for a straightforward installation
• Engineered to fit BMW F-Series platforms precisely
• Made in the USA by Burger Motorsports

Note: Drilling required during installation.

Fitment guide and part numbers

Choose the correct option for your model and year. Unsure which you need? Add your UK reg or last 7 of VIN at checkout and we will confirm before dispatch.

BMS163 - Large - Rear wheel drive 2016+

• BMW 1 Series F20 F21 LCI 2016+
• BMW 2 Series F22 F23 LCI 2016+
• BMW 3 Series F30 F31 F34 F35 LCI 2016+
• BMW 4 Series F32 F33 F36 LCI 2016+

BMS164 - Small - Rear wheel drive 2012-2015

• BMW 1 Series F20 F21 2012-2015
• BMW 2 Series F22 F23 2012-2015
• BMW 3 Series F30 F31 F34 F35 2012-2015
• BMW 4 Series F32 F33 F36 2012-2015

BMS165 - Small - All wheel drive xDrive

• BMW 1 Series F20 F21 xDrive 2012-2015 and LCI 2016+
• BMW 2 Series F22 F23 xDrive 2012-2015 and LCI 2016+
• BMW 3 Series F30 F31 F34 F35 xDrive 2012-2015 and LCI 2016+
• BMW 4 Series F32 F33 F36 xDrive 2012-2015 and LCI 2016+

Not compatible with: M2 Competition, M3, M4.

Perfect for

• BMW F20 F21 F22 F23 F30 F31 F34 F35 F32 F33 F36 owners wanting a rear axle brace
• Reducing axle tramp and improving straight-line grip on both AWD and RWD cars
• Fast road use, drag launches and track day consistency
• Strengthening the interface between the differential and rear cradle

Installation and fitting

DIY friendly with regular tools, though drilling is part of the job. Professional fitting is recommended for best results.

Want it installed by specialists? MJ Modifications offer expert fitting in Warwickshire. Request a quote at info@mjmodifications.co.uk.

Keywords customers use

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Real-world results

We have fitted this on customer cars and our own demo vehicles. Owners report a noticeably tighter rear end, reduced hop off the line and more predictable power delivery. It is one of the highest value handling and launch enhancements you can make to an F-Series BMW.

Part numbers

• BMS163 - Large - RWD 2016+
• BMS164 - Small - RWD 2012-2015
• BMS165 - Small - AWD xDrive

Photos

Shown is the large bracket brace.

Buy with confidence

MJ Modifications are BMW performance specialists. Add your registration or the last 7 of your VIN at checkout and we will confirm the correct option for your car before shipping. For fitting in Warwickshire, email info@mjmodifications.co.uk.