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IS - 1st Gen (2001-2005) Discussion about the IS models up to the 2005 model

‘01 Is300 - ‘03 ECU. Will it work??!?!!!!

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Old Jan 22, 2022 | 06:24 AM
  #1  
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LexAnita
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Default ‘01 Is300 - ‘03 ECU. Will it work??!?!!!!

I ended up with an ECU from an 03… can I put it in my 01?..
Can it be rewired??
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Old Jan 22, 2022 | 12:32 PM
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2001SolarY
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Not without entire harness change. Why do you want the 2003 ECU?
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Old Jan 22, 2022 | 11:05 PM
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Originally Posted by 2001SolarY
Not without entire harness change.
Any idea where I can find one?

Originally Posted by 2001SolarY
Why do you want the 2003 ECU?
I don’t necessarily.. I just had to get a new one bcuz I think mine’s kaputz. So I found someone on Facebook that was parting out their 01 and he had it complete with the cylinder and key and everything

I double checked that it was for an automatic but I didn’t think to verify that it was for an 01.. considering he was parting out his 01. Silly me. Anyways when I got it, I noticed the plugs don’t match.
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Old Jan 23, 2022 | 10:08 AM
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Not worth changing the whole harness. Just have your ECU repaired.
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Old Jan 31, 2022 | 12:11 PM
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it will not work even if you change out the harness, or make a patch harness.
01 uses a completely different commmunication to the chasis from the ecu.
you would have to change out all the chasis harnesses, computers, seats ect in order to make it work.


we can disable the immobilizer or pair a new key with the new ecu once you get it.

-Brandon Elzner-
www.quantum-auto.com
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