How common is it to have a combo of both drum and disc brakes on each rear wheel? Inside the disc rotor there’s a drum brake system.?

Question

Car is a 2016 Subaru STI

Answer 1

Yes that is your parking brake system, the hand brake. This is normal on some vehicles.

Answer 2

I have no idea of how common it is from a percentage perspective but I know several manufacturers have a rear disc ( for the regular brakes ) and a drum ( for the parking brake ) combination set-up.

Answer 3

The DRUM brake is your parking brake.

Answer 4

That's the parking brakes

Answer 5

It is common these days on cars with 4-wheel disc brakes. It didn't use to be common at all except on very expensive vehicles.

Answer 6

very common. drum is your parking brake.

Answer 7

The drum part is the cable operated parking or E brake.