Need help with new keys - Lexus IS Forum
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post #1 of 2 (permalink) Old 09-21-2018, 09:58 PM Thread Starter
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Need help with new keys

Hello,

A few months back I bought my first is300. It's a 2001. It came with a broken key and a, what I'm assuming a valet key. So, I had no master key. I bought a couple of 3 button keys for the car online. I took them to a local locksmith and had them cut. Then I sent in the ECU to be flashed and 1 key was programmed to it. I put it back in the car, and it starts and runs fine. But, no matter which "program" I try, I can not get the car into program mode. I can't set another master key, even though it's the same as the one programmed and working. Plus, I can not get it to program mode to program the 3 button remote fob. I've searched the www and have tried all routines I've come across. Please, I need help, this is so frustrating. Thank you in advance!
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post #2 of 2 (permalink) Old 09-22-2018, 06:33 AM
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I had a the same issue with 2001 models. I ended up going to a buddy at the dealership and he added and changed everything through the ECU log in.
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