AFTER ABOUT 90 DAYS OF INSTALLING A NEW BATTERY POWER IS DRAINED.
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2001 Lexus GS430 Question: BATTERY LOSE CHARGE AFTER APPROX 90 DAYS
Answer #1patrick mannion from Greg Solow's Engine Room, April 27, 2010, 01:33Master
The GS430 has a lot of on board computers that require memory and do draw on the battery. You need to place an inductive amp meter arround the battery cable the draw should be less than .025 Amps otherwise you have to investigate the source of a parasitic draw.