This service covers the repair of your 2004-2005 Lexus LS430 engine control unit (ECU) or engine control module (ECM). 2006 year ECU’s did not have issues so it’s unlikely you will need repair. If you have a 2005 with this VIN number or PRIOR you will need this repair:  JTHBN36F*5005700. If your VIN is after this sequence then it is similar to the 2006 model which will not need any type of repair or recalibration.

We repair, replace, and resolve on board component problems with this board. We take this service a step farther and include complimentary Toyota ECU software programming. We update your ECU to the newest software calibration. The recalibration along with our component repairs ensure your Lexus LS430 will shift and downshift smoothly again. 

This service will not resolve check engine error codes. You would need to determine what the codes are and then resolve those codes. This service is for 2004 and some 2005 LS430’s that don’t have any check engine lights, but exhibit rough low speed shifting and rough downshifts, usually from 3 to 2 and 2 to 1st gear. 

Even if you DO NOT have rough shifting problems it is still wise to get the new software calibration installed on your ECU and preventatively complete these repairs. 

If you are installing a used ECU into your LS430 we can also program your new VIN number into the used ECU. You will have a P0630 if this is not done.

Models eligible for this service include:

2004-2005 model year ECU’s that are affected: 89661-50690, 89661-50691, 89661-50692, 89661-50693

2006 model year ECU’s that are not affected: 89661-50870, 89661-50871, 89661-50872