Registered to see if ANYONE can help! My Mom's 2002 ES300 with 55,870 miles starts in the morning and is driven three miles to Target. Return to car and battery is dead. AAA jumps and off she goes to get her hair done. Hair is done and car starts fine and she is off to Costco. Returns to car and battery is dead. AAA jumps and she goes home. Next day no problems. Next day no problems. Next morning battery is dead. And on and on. Sometimes the car works fine for a month or two and then WHAM it is back to the dead battery routine.
This has been happening for two years. In November 2008 Lexus repair does a parasitic drain test and no anomalies are found. In January 2009 Firestone believes the alternator is bad and replaces it and the battery. Seven days later battery is dead again and Firestone replaces batter for free. So far 3 new batteries from Firestone and about to go get fourth. July 7, 2010 I took it to an auto electrical specialists and they do a drain test for 36 hours and find nothing irregular. I pick up car, starts fine, go to a store and return and car starts fine and go to lunch and return and battery is dead! Return to auto electrical specialists and they do another drain test for 24 hours as well as test alternator and starter. Everything checks out. Drive car home and no less than one hour later my Mom goes out to start it and...the battery is dead!!! Other than that the car is perfect! Does ANYONE have ANY ideas as to why this happens.
