Powerflex Road Series BMW Rear Diff Mount Front Insert Polyurethane Bush/Bushing F20 F21 F22 F23 F30 F32 F33 F36 1 2 3 4 Series (M135i M140i M235i M240i 335i 340i 435i 440i) Differential Bush Upgrade | OEM 33316792513 | Rear Final Drive Front Position

Powerflex Road Series Poly Diff Mount Insert for BMW F-Series Rear Final Drive Front Position

Unlock rear-end composure and traction on your BMW F-Series with this Powerflex Road Series polyurethane differential mount insert. Sitting in the front position of the rear final drive mounting, it fills the factory voids to curb unwanted movement under torque, giving you cleaner launches, tighter shift engagement and a more planted rear axle on B-road blasts and daily driving alike.

This is a simple, high-value chassis upgrade that slips into the existing rubber mount, so you keep OEM comfort while gaining precision. We run this insert on our own MJ Modifications F-Series builds and customer cars, and the feedback is consistently positive on driveability, grip and confidence.

Benefits

• Limits differential deflection for sharper rear axle response
• Helps reduce axle tramp and hop when accelerating hard
• Crisper gearchanges and improved throttle pickup
• Durable polyurethane for long service life and consistent performance
• Fits inside the original bush for a quick, cost-effective improvement

Applications

For BMW F-chassis 1 Series, 2 Series, 3 Series and 4 Series, including popular six-cylinder turbo models:

• 1 Series F20 F21 including M135i and M140i
• 2 Series F22 F23 including M235i and M240i
• 3 Series F30 including 335i and 340i
• 4 Series F32 F33 F36 including 435i and 440i

Product details

• Range: Powerflex Road Series
• Location: Rear final drive, front position
• Material: Performance polyurethane
• OEM reference: 33316792513
• Sold individually. Two inserts are required per car.

Installation

Professional fitting recommended for best results. MJ Modifications offers in-house installation in Warwickshire. Request a fitting quote at info@mjmodifications.co.uk.

Why buy from MJ Modifications

• BMW F-Series specialists who use these parts on our own cars
• Proven upgrade with excellent customer feedback
• Honest advice and aftersales support

Search friendly terms: BMW F20 diff mount insert, F21 F22 F23 differential bushing, F30 rear final drive mount, F32 F33 F36 diff bush upgrade, BMW 1 Series 2 Series 3 Series 4 Series poly bush, polyurethane differential insert, M135i M140i M235i M240i 335i 340i 435i 440i rear diff mount, BMW drivetrain mount insert, rear axle upgrade, anti hop anti tramp bush, OEM 33316792513 replacement insert.