2011 Lexus IS 350 Owners Manual - Page 446

5-1. Essential information If you think something is wrong If you notice any of the following symptoms, your vehicle probably needs adjustment or repair. Contact your Lexus dealer as soon as possible. n Visible symptoms l Fluid leaks under the vehicle (Water dripping from the air conditioning after use is normal.) l Flat-looking tires or uneven tire wear l Engine coolant temperature gauge needle continually points higher than normal n Audible symptoms l Changes in exhaust sound l Excessive tire squeal when cornering l Strange noises related to the suspension system l Pinging or other noises related to the engine n Operational symptoms l Engine missing, stumbling or running rough l Appreciable loss of power l Vehicle pulls heavily to one side when braking When trouble arises 5 l Vehicle pulls heavily to one side when driving on a level road l Loss of brake effectiveness, spongy feeling, pedal almost touches the floor 457