I bought a CPO 2012 G37 back in 2015 with about 19K miles on it and currently have about 49K. I replaced the battery this past January with a Costco Interstate one. The past week or so, I noticed that the trip meter and display unit between the odometer was being reset, meaning power was lost sometime during the day when I was not around. What I noticed the past few days is that I usually start up with no issues (no weird noises either), drives fine (maybe a little sluggish?), but sometimes once I hit the ignition off button, the car loses complete power immediately. This lasts for about 5 to 10 minutes and then the car regains juice.

When I went to Advance Auto earlier in the week, the reader said 'Replace Battery'. I went yesterday to another store and it said the battery was OK (image attached), but the employee said that the alternator or starter was a little off. Has anyone dealt with something like this before?

Thanks in advance!

EDIT: Whoops, sorry, I guess I should have posted in General Tech. I can't delete the thread now.

 

check the Battery leads..the negative lead may have become stretched or the terminal on the replacement battery may be a hair smaller than before causing an intermittent contact...It may just need to be reseated and tightened down.