Can I use a ECM off a 2005-2007 in my 2003 - Toyota Nation Forum : Toyota Car and Truck Forums

rainking1978 · 10-20-2009, 02:40 PM

Can I use a ECM off a 2005-2007 in my 2003? Are they all the same from 2003-2008? I need my ECM flashed but might be cheaper to get a new ECM if it will work. Thanks.

TrdSpeed140 · 10-20-2009, 06:15 PM

no, i don't think so. there were a few changes between the 2003/2004s and the 2005 and ups. im sure another member can elaborate on it for you.

Exage · 10-20-2009, 08:43 PM

I think the switch to a drive by wire ECM might cause problems... so I wouldn't bet they're compatible.

dorman68 · 10-21-2009, 05:22 AM

They are not interchangeable. The 2007-05 model years use a transponder key, therfore the pcm will be looking for a matching chip key to allow the vehicle to start. I would stick with the reflashing.

rainking1978 · 10-21-2009, 06:54 AM

OK, thanks guys!

fishexpo101 · 10-21-2009, 03:31 PM

I didn't thing that the Toyota ECMs were completely flashable - or at least to the extent of other manufacturers. I know that you can burn-in a new configuration for certain parameters (emissions, shift logic, etc.) but must be done through a Toyota scan tool. I have not seen any aftermarket alternatives as of yet. Just curious, what are your plans for the OEM ECM?

rainking1978 · 10-21-2009, 06:30 PM

I need to get this done.

http://corollatoys.org/service/files/EG028-04.pdf