2006 BMW X5 4.8is SOS
 

The brake pedal itself makes a sqeaking noise from inside the car? How do I fix the annoying sqeak

The steering wheel makes a sqeak when turning left and right.
I replaced bearings in the steering wheel before the firewall, still sqeaks!

Crawl under the dash and put some spray lube (white lithium grease, etc) on the pivot points and spring mounting points on your squeaky pedal.

You have to be more careful about the spray lube on the steering column - the steering angle sensor is under the dash and has an optical pickup - if you coat it with grease, it won't work...

Are you sure the steering squeak is coming from inside the cabin? The double u-joint is prone to fail and sits just outside the firewall in the engine compartment.