shimmy with light braking.... that's warped rotors. have 'em turned if they are still within the specified thickness; replace with stock; or, upgrade to cross-drilled rotors accordingly ;-)
i wouldn't look at control arm just now- thts going a bit too far for wheel shimmy :-)
My car has the "check coolant level" warnig light come on and the level is fine is this a sensor that needs to be replaced<<< sensors for coolant level-they're no different in principle than the floats u see in your water closet. chances are, it got dirty and is stuck at bottom, thus ur light. If yours is the kind that u can disconnect & unscrew from the coolant reservoir, by all means, take a chance and clean it ;-)
yes, you can have your speedo recalibrated. try and buzz me later on... am trying to remember the programs that allow you to do this... | 
