ringtone Posted November 7, 2012 Share Posted November 7, 2012 My car is a 2007 RX400h. It has always had a starting problem if left for more than a few days. I bought this car used 3 years ago. Early in that time Lexus replaced my car battery free. In April I brought my car into Lexus overnight to check the electrical system. After $100+, I was told there was no problem. Today I tried to start my car after 1 week of sitting in my garage. I saw light, but it would not start. There was nothing left on the last week. Any ideas? Quote Link to comment Share on other sites More sharing options...
maseace Posted November 7, 2012 Share Posted November 7, 2012 Mine can do that after sitting for a week. You will need to charge or jump the 12V battery. It seems to drain quickly in this car when sitting. Quote Link to comment Share on other sites More sharing options...
ringtone Posted November 7, 2012 Author Share Posted November 7, 2012 Is this normal? Do I need a different car battery? Quote Link to comment Share on other sites More sharing options...
RX400h Posted November 8, 2012 Share Posted November 8, 2012 1 week and a no start is NOT normal in my book. You might want to have a current draw test done to see if the draw your battery is seeing is above normal. If it is normal, perhaps look into buying a battery that is rated by Consumer Reports as having excellent reserve capacity. Those include: Interstate Megatron Plus MTP-24 Diehard Gold Napa Legend Premium Duralast Gold Autocraft Gold in that order. Those who live in the South should also look at The Walmart Everstart Maxx. Quote Link to comment Share on other sites More sharing options...
James Horning Posted November 8, 2012 Share Posted November 8, 2012 Install a battery buddy , it's a 12volt charger that supplies 2Amps of current on a needed basis , you wire a pig tail to the battery , up through the cowl so you can plug in while you are gone . Also don't leave a set of keys in the vicinity of the vehicle , it may keep some of the ECM s awake causing s draw on the battery . Quote Link to comment Share on other sites More sharing options...
lemon Posted November 9, 2012 Share Posted November 9, 2012 Three years out of the ridiculously small battery (as in CCA and reserve capacity) that Lexus specs for the 400h is about average. I replaced the one in my 2006 in 2009. I believe other owners have experienced about the same lifespan.I would suggest just throwing in a new battery. Too late now, but I would have spent the $100 on the Lexus diagnosis on the battery instead. Quote Link to comment Share on other sites More sharing options...
lenore Posted November 9, 2012 Share Posted November 9, 2012 Also check the little lamps in the trunk area to make sure they are not turned on. they can go un-noticed quite easily....But other wise get a non lexus battery replacement.... Quote Link to comment Share on other sites More sharing options...
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