key won't turn in ignition

Hi, my name is Devin. I am an auto repair expert with the Car Genius team here at RepairPal. I'm sorry to hear you're having trouble with your GX470. If your key won't turn in the ignition and you've recently replaced the keys, it's likely the ignition cylinder is wearing out. Over time, the internal components of the ignition lock can become misaligned. Replacing the ignition cylinder might be necessary if it continues to worsen. Lubricating the ignition with a graphite-based lubricant might help temporarily. If you need more advice, have any other questions about your vehicle, or would like to get connected to a RepairPal Certified shop near you, we have you covered. Give us a call at 877-913-1554, and we will happily help you out!