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2001 2002 2003 Toyota Highlander ECM Repair Service

2001 2002 2003 Toyota Highlander ECM Repair Service

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Warranty: 24 months

Ships until: 1 business day*

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* Business days that will approximately pass before this item can be dispatched.
[Updated on April 14, 2017]

This is a REPAIR AND RETURN service. You send your faulty ECM to our location, it is repaired, reprogrammed and tested and then it is rushed back to you through any of the services we have available from USPS and FedEx. Shipping (return shipment) is done worldwide. We offer FREE USPS Priority Mail shipping (5-7 business days) to all 50 USA States and to Puerto Rico, USA Virgin Islands, Guam and other US Protectorates.

International locations (outside USA) are served by FedEx, except Canada, which can be served by both, FedEx (recommended) and USPS.


The 2001, 2002 and 2003 Toyota Highlander models are commonly having issues with the automatic transmission with symptoms like the known issues with the 2001-2005 Rav4. In these models, the problem is also a failing ECM (Engine Control Module) and we can succesfully fix it, as usual, at a very affordable price.

This ECM module controls the engine and the automatic transmission of your Toyota Highlander. Our professional solution is backed up by a 2-year warranty.


Q: Why sending it to us?

A: It is simple, because we go further than all our competitors to make sure that you will have the best experience with us and to make sure that this issue will not happen again to your vehicle. We do not only repair the problem, but we reprogram the ECM, fix minor issues that the customer might not even be aware of and finally, we rebuild the complete unit.

How it works?

After you complete the order, you would need to uninstall (remove) your ECM from your vehicle (easily done, no mechanic needed), and mail it to our location. We repair, rebuild and reprogram the ECM and then it is returned to you and you will be ready to enjoy your car again in a way that you probably did not before.

Further below you will find a drawing with the location of the ECM

The following are the most common symptoms, but there are more symptoms not listed here:

-Hesitation or harsh shifting, specially in 3rd gear
-Shifting erratically
-Harsh engagement in reverse, often slamming into the gear
-Sometimes it feels like it is braking by itself
-One day it magically works ok and the other day, all the issues are back
-Issues show up only when cold or only when hot
-When stopping in a red traffic light and start moving again, it feels very heavy or sluggish
-Check engine is not turning on in some cases

This issue will affect:

The 2001, 2002 and 2003 Toyota Highlander, all 4WD (4x4) or 2WD, either the 4-cylinder model or any of the 6-cylinder models.

As with other Toyota models, servicing the ECM (a,k.a. ECU) of these models is something to be treated with urge to avoid damaging a ($$$) transmission! Once the ECM starts failing, the automatic transmission starts to be in high risk of getting damaged by this failure.

Below is a partial list of the Toyota part numbers affected. This number is shown in the label of the ECM.



Below is a picture showing the location of the ECM in the 2001, 2002 and 2003 Toyota Highlander:

Toyota Highlander ECM location


The included warranty is shown at the top of this page, near the picture and title.


Our TAT is only one business day. This may extend to 2 business days when work load is high.

Having 2001 2002 or 2003 Toyota Highlander transmission problems or issues? Transmission shifting problems or shifting hard? We can help!

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