How much longer should these rear brake pads last?

[BMW Dom]

I checked today, and rear outer pads are the thickness of the backing plate

 

[DGXR]

Hard to say how long they will last, depends on a lot of things, some stated in other responses and info is missing here: type of driving, towing/hauling/steep hills, thickness of opposing pads, are the rotors above minimum thickness.

 

[Chris142]

How thick were they when new?

 

[BMW Dom]

How thick were they when new?

I believe rear are 11mm new. I would guess they are around 4 or 5mm right now, I haven't taken the wheel off to look at the inside pad

I just noticed that the rears are ceramic, and the front are semi metallic.

Looking at service records, front brake pads were changed 25,000 miles ago, without the mention of the brake rotors. They look pretty rusted.
They are also squeaking like crazy.

The plan:

Front: new rotors, TRW ceramic brake pads

Rear: TRW ceramic brake pads


I have an appointment tomorrow at the dealer for a recall. and they are supposed to do an inspection too, so hopefully they can get a measurement of the brake pads, and I will post them here.

I am only putting on about 100 miles a week, but it is city driving, so definitely a lot of break wear.

 

[BMW Dom]

Rear brake pads outer are at 6mm. I will measure inner another time