jerzy1209

Over the past several weeks I have taken my 2008 IS 350 to the dealership because it losses power and will not start in the mornings after sitting overnight in my driveway. I have replaced the battery and the dealership kept it for several days to monitor the vehicle and unable to find the issue. Once I jump the vehicle, I have power throughout the day and sometimes several days I do not loss power and have no issues. I am at my wits end and do not know what to do? Please help

KEMPROGERS

Alternator?

jerzy1209

That's been checked, over and over again but not the alternator ...

Tootsall

Have you tried your question in the IS forums? They might have a better idea.

jerzy1209

Yes, I posted there as well..Thanks

Nelexus88

You might try a different dealer or even a Toyota dealer who might have better diagnostic skills.

supaman1o1

I had the same problem with a 2009 Accord years ago. I replaced the battery, and it worked for a few months, but went back to being the same way. The alternator was tested and had no issues. When I brought it to Honda, they wanted to replace the battery cable for $700. I declined, because I had doubts. A few days later, the car did not start at all. It just made a click sound, with no cranking. In the end, the problem ended up being the starter. I took the car to a local shop and had the starter replaced. We gave the car to my in laws, and it is still running today with the same battery (after 4 years). Basically, the starter was defective and causing a parasitic drain overnight. Replacing the starter cost me about $600 (less than the battery cable). I hope this helps.

mandyfig

I did have a similar event happen to me on my Honda CRV. One day, car will not start. I used a Jumper, car still does not start. Battery was just a year+ old.

Called a friend Mechanic and at the end of the day, I ended up replacing the Starter and had the battery replaced (Costco) free. It was the starter. Knock on wood, everything's still OK. What I should have done is to have had the starter checked at the Auto Store, lesson learned.