2001-2003 Toyota Highlander ECM repair service


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All orders are shipped within 1-3 business days.

Capacity: 12 orders


Brand: Toyota
Condition: Refurbished
Services Sold: 28
Lead Time: 1 business day
When in stock, this is the processing time in business days that this product takes from ordering to be actually shipped.

Some 2001, 2002 and 2003 Toyota Highlander models are commonly having issues with the automatic transmission too, showing symptoms like the known issues with the 2001-2005 Rav4. In many Highlander models, the problem is also a failing ECM (Engine Control Module) and we can successfully fix it for you.


This ECM module controls the engine and the automatic transmission of your Toyota Highlander. Our professional solution is backed up by a 1-year warranty.


PLEASE NOTE: This is a REPAIR AND RETURN service. After you order, you will need to send your faulty ECM to our location. As soon as it is repaired and reprogrammed, it would be shipped back to you through any of the services we have available for you to choose from (USPS and FedEx).


FREE USPS Priority Mail shipping (5-7 business days) is offered to all 48 USA States, Hawaii, Alaska, Puerto Rico, USA Virgin Islands, Guam, and US Samoa. For faster shipping, we included a rate calculator that can be accessed when adding the service to the cart.


Why sending it to us?


It is simple. Because we offer the most complete service for these units and go further than all of 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 ECM. We do not only repair the problem, but we reprogram the ECM and fix minor issues that the customer might not even be aware of. As with all other Toyota ECM services we provide, the ECM will be checked for having the latest software version. If it is outdated, we will install the latest update available from Toyota for your specific ECM.


How does it work?


After you complete the order, you would need to disconnect and remove your ECM from your vehicle and mail it to our location. We repair, rebuild and reprogram the ECM and then it is shipped back to you.


The following are the most common symptoms, but there could be other symptoms not listed here:


  • Hesitation or harsh shifting, especially 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 at a red traffic light and start moving again, it feels very heavy or sluggish
  • Check engine light does not turn on in many cases


This issue will affect:


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


Servicing the ECM of these models is something to be treated with an urge, to avoid damaging the automatic transmission once the symptoms start showing.


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


89661-48231 89661-48230 89661-48240 89661-48241
89661-48250 89661-48251 89661-48260 89661-48350
89661-48360 89661-48370 89661-48380 89661-48410
89661-48420 89661-48430 89661-48431 89661-48440



Where is the ECM located?


Below is a picture showing the location of the ECM in 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.


Turnaround Time


Our TAT is only one business day, plus shipping transit time.


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Weight 2 lbs
Dimensions 12 × 10 × 2 in
Product Type

ECM / ECU Repair service (Repair and Return)

Original ECM needed?


Turn Around Time

1 business day plus shipping transit time


The included warranty term (stated at the top of this page) covers the job done in the ECM and any parts replaced. In the rare event that the ECM fails again, showing either the same or similar problems as before, we will consult the customer about the symptoms and if the ECM is suspected to be the culprit, it will be taken back for service at no cost for the job or parts.

While the job would be done at no cost and needed parts would not be charged in the period covered by the warranty term, inbound and outbound shipping costs will depend on the case, as described below.


A. If a claim is filed anytime within the warranty period and the problem is caused by something we did wrong (errors or mistakes in the repair process), if it happens in the first 30 days of the warranty period, we will cover both ways shipping. If it happens after the first 30 days of the warranty period, then we would only cover return shipping (from our location to the customer’s location).

B. If the claim is filed within the warranty period and it was not our fault, for example, a different part or different circuit is damaged this time and it was not caused by our previous intervention with the ECM, or if the same part is damaged, but because of an external cause as defined below, then we will still cover the job and needed parts for servicing it again, but the customer would need to cover both ways shipping.


1. The ECM was soaked in water or any other liquid.

2. The ECM fell from a considerable height or was hit hard (ex. an accident), causing internal damages to the circuit.

3. Short circuit in the vehicle’s wiring or problems with the electrical system of the vehicle.

4. Battery polarity reversed.

5. The ECM was used in an application that the ECM is not intended for (different car, different make, model or different setup).

6. The ECM was tampered with, either by opening it or by connecting wires to the ECM’s terminals other than the ECM’s wiring harness.

7. The use of piggybacks – External modules connected to the ECM terminals in order to modify the received signals (mostly done for engine performance).

8. Broken warranty seals indicating tampering.

If the ECM fails again and the issue is not related to what we did, we can take a look at it and repair or correct the problem if possible at no charge to the customer, but shipping would need to be covered by the customer. We agree to correct any other problem that could appear in the module even if it is has nothing to do with our previous intervention or previous problem as long as it is possible and doable.

What other users are looking for:

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What other users are looking for:

2002 toyota highlander ecu programing 2003 TOYOTA ECM REPLACEMENT REPROGRAMMING How to program highlander 2002 ECU toyota highlander ecm location toyota highlander ecm problem what is an ECM in my toyota highlander 



Once we receive your ECM to be repaired or reprogrammed we will notify you and most of the time it will be serviced the same day.

After your ECM is completed, usually the next business day, we will also notify you and the unit will be shipped back.

The shipping details and a tracking number will be emailed to you as soon as shipping is done. You may also receive an SMS text message as an alternative way of letting you know in case the email fails to reach your inbox or in case it goes to the spam folder. For this, it is optional but recommended that you enter a mobile phone number when ordering, instead of entering a landline phone number.


There is a FREE shipping option (through USPS) for USA locations. The free option covers the USA mainland, Puerto Rico, Hawaii, Alaska, and US Virgin Islands.

Delivery time for the offered free shipping option to USA locations will be 3 to 5 business days. On the other hand, the paid USPS and FedEx Express options for USA locations will be next business day for FedEx Priority or 2-3 business days when USPS Express or FedEx Economy are used.

The only exception about using FedEx to the USA locations is if the shipping address is a PO Box or an APO (Army Post Office box). We do ship to PO Boxes and APOs, but in those cases, shipping will be done through USPS, which would be USPS Priority Mail for the free option or USPS Express (Priority Express) for the paid option. USPS options will take slightly longer transit times than FedEx.

Depending on the case, units in warranty could also be shipped through USPS Priority.


At this moment we, unfortunately, have no free options for international locations and we hope we can offer some kind of free international shipping in the near future.

Import Customs clearance in the destination country may add one or more days to the delivery time when shipping to international locations (out of USA).


You can calculate the exact shipping rates available for your location with the provided calculator, shown in your cart when you Add-to-Cart any product or service. There is no need to log in or have an account for doing this.

It is important that the Country and postal code are entered for getting accurate rates. Please note that the rate calculation will often be way off (higher or lower) than the actual rate if the needed information is not entered or is not accurate when using the rate calculator, specifically, Country, Postal Code if available or City if Postal Code is not available in your location.

We DO NOT profit from shipping. Any rate shown by the provided calculator is passed to you directly from USPS and FedEx through our API connection (Application Programming Interface) to our accounts with both Companies. Any time they do any changes in prices, it will be automatically reflected in our calculator.

Thank you!

What other users are looking for:

2002 toyota highlander ecu programing 2003 TOYOTA ECM REPLACEMENT REPROGRAMMING How to program highlander 2002 ECU toyota highlander ecm location toyota highlander ecm problem what is an ECM in my toyota highlander 


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