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Originally Posted by simsimi1004
its a 2008 g35x, the only mod i did is LEDs like a year ago or more. Ive had the car for 1.5 years. LEDs i can switch back to OEM. and its unlikely that they can drain a whole battery?
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It doesn't have to drain the whole battery, if the battery is discharged to a point that it doesn't have enough amps for the starter to crank, it won't start. Hence sometimes just taking a battery to test can be misleading, because they usually only measure the how much amps it can take. The problem is if the battery discharge quickly.. it doesn't matter if it can hold 637Amps like you had said. eg it discharges say 2Amps every minute (when there is no amps).. then chances are when you get home the battery won't work.
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If it is a loose belt, alternator, parasite drain, bad diode, shouldnt everything be covered under warranty?
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Yes it should, however again electrical system is such a general system. However I think you should be okay, since most dealerships want to keep their repeat customers.
Oh alternator clutches are usually disengaged during the warm up phase on most modern cars to save on emissions.
And for the vent, can't you just pop your hood to find out?