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RX - 2nd Gen (2004-2009) Discussion topics related to the 2004 -2009 RX330, RX350 and RX400H models

Key broke lost 3 button module with chip inside ...help

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Old Mar 24, 2025 | 01:10 AM
  #16  
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An sorry for the delay .am I appreciate any an all help thank you
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Old Mar 24, 2025 | 05:54 AM
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2 questions
#1- you do not have the metal blade portion to a "master" key correct?
#2 - do you have access to either Tech stream or equivalent high end obdII tool and knowledge of how to use it?

If the answer is yes to both them purchase a proper key from Noble, the dealership, or a known reputable source NOT eBay. If the answer is no then it will require a locksmith to program it (I'd still purchase the key separately to be sure it is high quality not a Chinese fake, I bought a fake one learned my lesson. Contrary to some rumors a master key is not necessary keys get lost all the time and a decent roadside locksmith will have no problem pairing it. A new key will also require the metal blade to be cut, Noble or similar locksmith can do it they'll require either your key number (either found in your owners manual sometimes, the dealership ( they will charge you a lot just to give you the key#at least mine here in Boise did), or they can do it by good pics of your metal blade as they did mine.
The remnants you have left there are not worth keeping, not even the battery the only thing of value could be the metal blade if still around if not you will need to source the key number locksmiths can laser cut it with the number or sharp pics. It won't be too expensive unless you go to the dealerships ( key and programming runs >$325 at mine) I did it for <$50 but I have Tech stream (that was under $30) and I did have the metal blade needed. My key was cut and arrived in a couple days, took maybe 5 mins from start to finish to program. This does not require a new immobilizer simply a proper key and proper programming. Our cars are capable of having up to 5 keys programmed to them, if you are trying to program a new key and all 5 slots are filled you can simply remove one or all the unknown keys takes all of a few seconds to do

Last edited by Leeper; Mar 24, 2025 at 06:18 AM.
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Old Mar 24, 2025 | 10:41 AM
  #18  
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I have the metal part of the master key
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Old Mar 24, 2025 | 10:53 AM
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Originally Posted by vicrodd00
I have the metal part of the master key
You're good then... grab a good quality key (not eBay key), have it programmed either by yourself with Techstream or equivalent or find a reputable locksmith (I called local guys here they said $40 for programming). You should be able to replace the old metal blade into a new key (make sure the new key includes the black plastic outside, the blade, and all the electronics inside many do not they are only the black plastic and blade).

Just over a year ago my black plastic on my key was crumbling/failing so I bought new plastic from eBay, despite very low usage the new one was extremely brittle lasted maybe 4 mos before faling apart. I also tried ordering the electronics inside the key from eBay was not able to get it to pair to my car thoguht Techstream was the issue... once the new key from Noble arrived it paired in minutes so the one from eBay was clearly not functional... lesson learned.

Good luck
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Old Mar 24, 2025 | 11:37 AM
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@vicrodd00 can you turn the car on? Like.. does the gauges light up when u move your broken key to “on” position?
If it does turn on then techstream may work.

Take a look at the video below starting at ~10:50 mark. Looks like if you can get into techstream, you can program/reset the I’mmobilizer and program new keys/chip.
I’ve had good luck with eBay key and chip from a seller named 1010keys or something similar for $35 for a flip key cut and ready to program.

Last edited by joedaddy1; Mar 24, 2025 at 11:39 AM.
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