Genuine BMW Rear Differential Output Shaft Oil Seal for LSD - OEM 33107505605 - Fits E60 E87 E90 F25 (123d, 335i, 535d, X3 35dx)

BMW Final Drive Side Shaft Seal | OE Ref 33107505605

Stop diff fluid weeps at the source and protect your drivetrain with this genuine BMW side seal for the rear final drive. Perfect for limited-slip conversions and routine differential refreshes, this OE seal delivers factory fitment and long-lasting performance on popular E and F series platforms including 1 Series, 3 Series, 5 Series and X models.

Why this OE seal is the right choice

• Original part for exact fit on the output flange to half shaft interface.
• Helps eliminate gear oil seepage to safeguard your limited-slip unit and bearings.
• Built to BMW specifications for reliability on the road, fast road and track.
• Used in our own workshop builds and customer installs with excellent results and happy owners.
• Ideal for LSD upgrades, differential overhauls and preventative maintenance.

If you are fitting a limited-slip centre or refreshing a rear axle assembly, replacing the side shaft oil seal is essential for a clean, leak free job. Common symptoms this seal addresses include oil mist on the inside of the wheel, dampness around the output flange and low diff fluid levels over time.

Part details

• Manufacturer: BMW Genuine
• Reference number: 33107505605
• Location: Rear final drive output flange to driveshaft

Vehicle applications

Suits a wide range of BMW models where this OE reference applies, including:

• 1 Series E81 E82 E87 E88 such as 123d and 135i
• 3 Series E46 E90 E91 E92 E93 including 330d 335d 335i and xDrive variants
• 5 Series E39 E60 E61 including 530d 535d 550i
• 6 Series E63 E64 including 645Ci 650i and 635d
• 7 Series E38 E65 E66 E67 selected diesel and petrol models
• X models: X1 E84 25dx, X3 E83 3.0sd, X3 F25 30d 35d, X4 F26 30d 35d, X5 E53 3.0d 3.0i 4.4i 4.8is
• Z Series: Z4 E89 35i 35is and Z8 E52
• Rolls-Royce Phantom RR1 and Series II where applicable

Not sure it matches your axle code. We can confirm fitment before dispatch. Provide your UK reg or last 7 of VIN at checkout.

Fitting service

Professional installation recommended. We can supply and fit at MJ Modifications in Warwickshire. For a quote email info@mjmodifications.co.uk.

Helpful tips

• Inspect both sides of the final drive. These seals are commonly replaced in pairs during an LSD conversion or diff rebuild.
• Renew diff oil with the correct BMW specification fluid after installation.
• Check output flange and driveshaft for wear or play before refitting.

Warranty

Two year manufacturer warranty for UK customers and one year for international customers when a VIN is supplied at checkout on compatible vehicles.

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