yustle

I have a 2009 RX350 with 43,000 miles. (still under warranty) I've had to jump the car off four times in the past 3 weeks and have taken it to the dealer twice. Both times they said the battery checks out and can't find anything wrong. They suggested that maybe we left the key on ACC and that drained it. That's not the case. The battery is shot, I replaced it today and they agreed that the battery was bad. My question is that: 1) could something else be draining it? The dealer said that they couldn't find a parasitic drain or 2) Is Lexus service incompetent and dishonest? This is our first Lexus and so far, I'm totally unimpressed. Thanks.

Your dealership provided you with poor service. No doubt about that. Once you told them that you had to keep giving your battery a jump, they should've replaced your battery under warranty (battery is covered for four years). Once you jump a battery and drive around for a bit, the battery can test just fine. The issue is, can the battery hold a charge and that's something that can't be tested unless they hold your car overnight.

I had the same exact problem as you did back in November of 2010 on my 2008 RX350. It had about 42,000 miles (about three years). I had to jump it every time I wanted to drive it. When I took it to the dealership and explained the problem, they gave me a new battery under warranty quick and easy.

I've also googled this problem and it isn't as uncommon as you would hope. Other owners' batteries have also died at around the three year mark.

Someone stole one of my valve caps and I haven't been able to find a replacement online that is the same as the other three. Does anyone know where I can get one for the 2008 RX 350? I took a photo of one of the caps below.