I have a 2007 GS450h. I went to get the tires replaced and when I got it back, pretty soon I got a bunch of warnings - "Check Hybrid system, Check VSC and Check ECB". Looking at these forums, I thought it might have to do with the 12V battery, but it seems to be okay. The car basically ran fine for a couple of weeks, but twice in the past week, the engine refused to respond to the accelerator and I had to coast to a stop. But I was able to get it going again after turning it off and back on again. I then got the OBD2 dongle and installed TechStream via VM on the Mac and was able to connect it up.

Is the battery caput? Why did that happen soon after I replaced the tires - was it a coincidence? Any advice on what to do next? Should I go to the dealer or a local (San Jose area) hybrid battery expert? I am happy to reconnect the cable and get any more info from TechStream that might be relevant.

 

I have a 2007 GS450h. Hybrid battery is done but I want to know if it makes sense to purchase brand new battery ($4300) or buy a used battery. Mechanic says do not buy refurbished or aftermarket battery.

Could someone on here provide viable feedback.

Thanks

 

I've read some decent reviews from people buying aftermarket batteries, and it comes with 2-3 year warranty, so its not too bad. Unless you're willing to shell out oem price lol. I would go the aftermarket route in my situation in the future, but that's just me.

 

You can also change individual battery packs with used ones bought online. I've seen a few do it themselves on the forum. You can also have a qualified mechanic swap them out.