Question about 2007 BMW 525xi Sedan
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Posted on Jan 02, 2017
The Active Steering system uses a Papst
brushless dc motor to rotate the cage (ring gear) containing the planet
gears a planetary gearbox at the bottom of the steering column. The
motor effectively changes the steering ratio by increasing or
decreasing the amount of gearbox output rotation relative to changes in
the steering-wheel angle input. The resulting ratio depends on the
speed of the car. For instance, a low 10:1 ratio gives high
maneuverability for parking in tight spaces, with less than two turns
of the steering wheel, lock to lock. To track straight at highway
speeds, where even a small steering input can produce a quick sideways
acceleration, the electric drive boosts the ratio to 20:1. Cars without
Active Steering typically have ratios halfway between (specifically
14.1:1 for the BMW).
Now, if your active steering does not work , the car reverses back to power steering and the ratio is 15.1:1 so the car can be driven but the "active steering " is not working and still needs to be fixed.
It the unit needs to be replaced and your car is not under warranty, the repair cost may reach 5000 dollars.
Posted on Oct 29, 2008
I just had this happen to me yesterday with my 2002 Santa Fe. After trying everything (jiggling steeling wheel, shaking the car, you name it we tried it). We got a chain and pulled the car ahead about 2 feet. That didn't seem to do anything but we then pulled up the emergency brake into the lock position and tried to start the car (with the ER brake on) and it worked!!! The steering wheel came unlocked and the car started up. Don't know if it was the pulling of the car that broke something free or if it was the ER brake, but that was what worked for me.
Posted on Jan 12, 2009
the better question is, "why are the rotors warped?" replacing them without figuring out why will only cause the new rotors to warp again.
look for a caliper that is dragging if only one rotor is found warped. a caliper that is found to not be retracting one or both pads on one side will cause extreme heat to the rotor at speed. if both are found warped, check both calipers. be sure to also check if the brake cooling ducts are obstructed.
when replacing the rotors, be sure to replace the brake pads also AND the brake sensor wire. don't use old pads with new rotors and vice-versa.
Posted on Feb 23, 2009
SOURCE: where is the battery located
Quit looking under the front hood...it isn't there. The BMW and Porsche 928 folks love to put the battery in the back. BMW---in the trunk under the right (passnger side) access panel. 928----rear hatback a little left of center under the spare tire. Genius those Aryans.
Posted on Nov 04, 2009
Passenger side rear quarter panel in the trunk (yeah, in the trunk, believe it or not). Look under the pass side tail light in the trunk you'll see the two screws holding down the cover.
Posted on Dec 06, 2009
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