engaging the parking brake - creak

[rh71]

When I engage the parking brake while on an incline like a driveway, turn off the vehicle, then release the brake (or vice versa on the last two), there's a really prominent creak even from inside of the cabin. I've experienced it on other driveways of varying degrees as well - I know there's something that is engaged that locks things in place but the creak... does that bother anyone else? Doesn't happen on flat ground of course... just wondering if it should be as loud as it is and if you guys notice it. On other vehicles, once the parking brake is engaged, it's locked pretty solidly in place but not the X... there's more initial give than usual.

I want to be sure it's not a mechanical problem relating to a suspension creak of similar sound I sometimes get when going over bumps (which of course didn't happen when the service guy rode with me).

[pureflames]

Good question - I have the same symptom.

[rh71]

are others just not parking on inclines or simply don't have this sound when they do?

[Thunder22]

IMO it's normal.

[Weasel]

Normal, it happens on just about any BMW I ever see... (the driveway behind my stall is a decent incline)

[x5mad]

Happens with mine as well, quite annoying though that the parking brake does not take all the load to begin with. It creaks and sometimes rolls fowards and backwards slightly, letting the transmissions parking pawl (pewl?) take some of the weight.

[FunfDreisig]

I'm guessing that the creak occurs during the transition between hydraulic and mechanical control of the parking brake....

" Electromechanical Parking Brake.
Starting off on a slope, in stop-and-go traffic or whenever the engine is turned off: the Electromechanical Parking Brake ensures your BMW stays comfortably and reliably at a standstill whenever required.

Working together with Dynamic Stability Control (DSC), the Electromechanical Parking Brake controls all braking processes whenever the vehicle is not moving. If the engine is running, it operates hydraulically via the DSC brake system. If the engine is switched off, electromechanical brake cables support the function of the conventional handbrake...."

FWIW our 2001 X5 brakes would creak very loudly if I released the brake pedal very slowly and then reapplied the brake (e.g. when backing up very slowly to hook up the trailer).

Funf Dreisig

Quoted from
BMW Technology Guide : Electromechanical Parking Brake

[FunfDreisig]

Originally Posted by rh71

....I want to be sure it's not a mechanical problem relating to a suspension creak of similar sound I sometimes get when going over bumps (which of course didn't happen when the service guy rode with me).

One of the quirks of our late lamented 2001 X5 was the loud creak/snap when going over bumps at low speed. After BMW technicians replaced nearly all of the front suspension bits in multiple failed attempts to eliminate this creak/snap, I took off the sway bar during a BMW CCA tech session at the local dealer and discovered/fixed the noise The problem was grit build up in the rubber mount/bushing that would freeze and quickly release the energy/sound to the large aluminum 'splash pan' under the engine. This flat pan acted like a large speaker amplifying the sound.

The diagnostic clue was that the creak/snap noise only happened when the two front wheels went over a bump at different times (i.e. driving over a speed bump at an angle) at low enough speeds to get the two sides to react differently.

Funf Dreisg

[alewifebp]

Happens all the time. And I get the rollback. Interestingly, it doesn't roll back at all when I park on an incline, but always in a flat surface. Go figure.

[vinuneuro]

The car rolls back when you're on a flat-surface? Probably worth getting checked out why your X5 is breaking physics.

Originally Posted by alewifebp

Happens all the time. And I get the rollback. Interestingly, it doesn't roll back at all when I park on an incline, but always in a flat surface. Go figure.