HeenaM

Wow! That sounds amazing. I'm glad it worked and continued to work for so long. 🙂

Thanks for explaining. I agree. I would have liked to know but I already paid £130 to find out there's a parasitic drain from the onboard body control module and that the body control module also powers the audio module which is another item that can sometimes have this parasitic drain problem. I would have had to pay nearly £200 for Lexus to investigate it further or take it out of London for a (non-Lexus) specialist to check it out and THEN pay to fix it. You're right. It was a headache and I'm so glad it's over and done with. 🙂

Hi. The discharge rate was 0.4 amps. I don;t really know what that means but we had the car about 4 years and it wasn't an issue before. The drain was so 'strong' that a new battery was reduced to 43% of its life within 2 months. Not using the car for a day or more resulted in the battery being so flat that we couldn't even lock the car with the button on the key, but had to do so manually. We have now sold the car. We got less for it because we declared the fault but that's only fair. 🙂

We've got the same problem with our 2008 IS250. The battery and alternator are fine, so we had an electric specialist come and have a look. We learned that there's a parasitic drain from the onboard body control module which is discharging the vehicle when it's switched off. The body control module also powers the audio module which is another item that can sometimes have this parasitic drain problem. Either way it needs repairing or replacing and 'regular' garages don't seem to have the software or coding skills needed to fix it. So it will have to go to Lexus & that's going to cost a lot! 😞 Has anyone managed to remedy the problem? If so, how and how much did it cost?

We've got the same problem with our 2008 IS250. The battery and alternator are fine, so we had an electric specialist come and have a look. We learned that there's a parasitic drain from the onboard body control module which is discharging the vehicle when it's switched off. The body control module also powers the audio module which is another item that can sometimes have this parasitic drain problem. Either way it needs repairing or replacing and 'regular' garages don't seem to have the software or coding skills needed to fix it. So it will have to go to Lexus & that's going to cost a lot! 😞 Has anyone managed to remedy the problem? If so, how and how much did it cost?