What’s a ‘final drive?! 2004 BMW 318i

[wax lyrical]

Advice needed all, please. A friend’s BMW in Cyprus needs a new ‘final drive’ apparently. What is this exactly and is it expensive to replace? 2004 318i.

Thank you!

[Silverbullet767]

Correct me if I'm wrong PH, but isn't it a cog in the gearbox that determines the speed of the rest of the gearbox?

[helix402]

It’s the differential. Located in the rear subframe. Secured by some bolts, connected to the driveshafts and propshaft.

[iSore]

Differential.

Not dear, around £100 for a good used one. Will be a 3.38 ratio small case (168) if it's a manual. Loads around.

[wax lyrical]

Many thanks for the replies guys. Much appreciated!