i am not aware of any forum exclusively devoted to cars, so i turn to here, my only refuge my brother bought an Infinity G20 (1999) 20 days ago from a small-time dealer in Phoenix, AZ for $9000. (dealer got the car at some auction). Got it tested independently, no problems. Carfax report, all good. Suddenly last week it stopped dead while driving. Everything stopped - no power, no lights, no brakes, no nothing. he could not even put his windows down. he was lucky the traffic light was green (he could not have stopped, no brakes!) and he could go past it, slowly steer it to the side of the road and wait for help. a cop appeared, and told him he needed to get off the road because the shoulder was not big enough; when told of the problem, he offered to push this car with his own as long as bro could steer it. well, his 'push' wasn't gentle enough, and this car kept rolling, and the cop had to be told to go gentle... just shows how bad it was. anyway, he got it towed it home (was late at night, dealer not available); the next morning, the car started! he drove it to the dealer, who did not believe that a car could die out like that, and then start without a fuss. Still, after a couple of hours of tinkering around, the dealer gives his car back to him saying the car should be fine now, he has recharged the battery and he can't see anything wrong. later, brother took the car for a comprehensive checkup at an Infinity dealer, but nothing turns up there, other than a comment that the car is fine, maybe the alternator needs replaced. yesterday, brother is driving on a freeway, and the same thing happens again - total shutdown. he panics, but manages to put the hazard lights on, and steers the car (using its own momentum) to the shoulder. this time (once he overcomes his fright) he calls the dealer who sends his mechanic. the mechanic changed the battery with one he had brought, and the car started. now the dealer has given my brother a loaner car while he tests the G20 for 2 days. my query is, has anybody seen this before? is this a battery / alternator problem? i am pushing my brother to try and return the car and get another from the same dealer. since the one-month warranty period offered by the dealer is still in force, he should be okay replacing with another from his own stable, right? any ideas? is this a lemon? are there lemon laws in AZ? personally, i felt this has potential for a dangerous situation, being in a car on the road with no brakes or anything. i mean, what if the next time it shuts down is in the way of traffic going across?