When my parking brake actuator broke a few months ago, I swore I'd tear it apart first before shelling out $1000 for a new one.

So, I've finally had some real time and got it out of the 2008 X5 4.8i, cracked it open, and viola! The ground spade for the motor had separated from the motor!!!

Did the electrical repair, and tested it directly on the car battery, and it worked! Got it reinstalled, pressed the brake button to reset, and the yellow light went away.

I had all tools and expendables in the garage. $1000 saved!

So if you're mechanically inclined, consider taking a look inside of it first.