Genuine BMW M Performance Limited Slip Differential (LSD) - F30 F31 F32 F33 F36 3 & 4 Series 335i 435i 440i incl. xDrive - Rear Mechanical Diff Upgrade - OEM 33107555607

Availability update
This factory BMW sport differential, part number 33107555607, is no longer supplied new by BMW. If you need a replacement rear diff solution for your F30 F31 F32 F33 F36 335i 435i 440i including xDrive, contact us for proven alternatives and expert advice.

BMW F3x rear final drive upgrade for 335i 435i 440i including xDrive

Looking to boost traction, reduce inside wheelspin and put power down earlier on corner exit? This BMW M Performance rear axle unit is the benchmark clutch-pack slip-limiting diff for F3x chassis cars. It biases torque to the tyre with grip for sharper turn in, stronger drive off the apex and a more composed, confidence-inspiring balance in wet, dry and even light snow. Ideal for fast road use and track days.

We have fitted and driven this unit extensively on customer cars and our own builds, and feedback has been consistently excellent. Owners report noticeably better traction, more predictable handling and smoother power delivery on N55 and B58 models. It is the ultimate OEM-plus drivetrain upgrade for the 3 Series and 4 Series petrol turbo platforms.

Key benefits

• Clutch-type torque biasing for the rear axle to limit single-wheel spin and maximise usable grip.
• Better corner exit speed, improved stability under power and a more precise, connected feel.
• Road and circuit friendly calibration for all-weather traction, including xDrive all-wheel drive variants.
• Genuine BMW M Performance item for OE reliability, perfect integration and no warning lights.
• Self-contained assembly that can be reverted to stock, great for future resale or lease return.
• For vehicles with automatic transmission.

Applications

Compatible with the following BMW 3 Series and 4 Series petrol models. If unsure, request a free fitment check.

3 Series F30 Saloon

• 335i 3A91, 3A95
• 335i xDrive 3B91

3 Series F31 Touring

• 335i 3G91
• 335i xDrive 3H91

4 Series F32 Coupe

• 435i 3R11
• 435i xDrive 3R51
• 440i 4P11

4 Series F33 Convertible

• 435i 3T31
• 435i xDrive 3T71
• 440i 4T91

4 Series F36 Gran Coupe

• 435i 4B11

Part number

33107555607

Fitment verification

We confirm compatibility before dispatch. Provide your UK registration or the last seven characters of your VIN at checkout for a free check so you receive the correct rear final drive for your car.

Installation

Professional fitting is strongly recommended for any rear differential retrofit. MJ Modifications offers in-house installation in Warwickshire with alignment and road test. Email info@mjmodifications.co.uk for a tailored quote and availability.

Warranty

Two years manufacturer warranty for UK customers and one year manufacturer warranty for international customers when a compatible VIN is provided at checkout.

Need an alternative rear diff solution

As this BMW M Performance unit is discontinued, we stock, supply and fit high quality replacement LSD options for F30 F31 F32 F33 F36 335i 435i 440i including xDrive. Get expert guidance on the best setup for your driving style, road or track use and budget. Email info@mjmodifications.co.uk for recommendations and pricing.

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