Question 1

What is the main purpose of the differential?

Accepted Answer

A differential is a differential mechanism that allows the drive wheels to rotate at different speeds, especially when cornering.

Question 2

How does a rear differential work?

Accepted Answer

The rear differential transfers torque from the drive shaft to the rear wheels, allowing for variable speed control in corners and improving traction.

Question 3

What does the differential OEM number mean?

Accepted Answer

The OEM (Original Equipment Manufacturer) number is a unique manufacturer code that identifies a specific vehicle model and year.

Question 4

How to choose a differential for a BMW E46 318i?

Accepted Answer

It is best to choose a differential compatible with your vehicle's OEM number and VIN.

Question 5

What are the benefits of differential LSD?

Accepted Answer

The LSD differential increases traction on surfaces with varying friction coefficients, reduces wheel slippage and improves cornering stability.

Question 6

How much oil does a BMW differential require?

Accepted Answer

A standard BMW differential requires approximately 1.5–2.0 liters of 75W-90 API GL-5 oil, changed every 60,000–80,000 km.

Question 7

Does the differential affect driving comfort?

Accepted Answer

Yes, a properly selected and efficient differential ensures a smooth ride, stability in corners and reduces vibrations and noise in the drive system.

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