Repair Service: 1992-1996 Lexus SC300 SC400 ECU Engine Computer Rebuild

(15 customer reviews)

From: $199.99

* terms & conditions for purchasing a repair service
Please select a shipping insurance option.
Our outbound UPS shipments are insured up to $100 at no additional cost. If you would like to be covered beyond this amount, it is the customer’s responsibility to add additional insurance to cover your part should it get lost or damaged in transit. If you use our inbound UPS portal you can add extra inbound insurance.

This service covers the repair and rebuild of your 1992-1996 Lexus SC300 or SC400 engine control unit (ECU) or engine control module (ECM).

You will notice we have a drop down for models and corresponding problems. What this means is the longer you wait to rebuild your ECU the more damage is happening. Once so much damage occurs the ECU will no longer work at all, the car won’t start, the check engine light won’t turn on, and there will be significant physical damage. This can double or triple the amount of work and labor needed to bring your computer back to life.

Pricing effective 6/1/2024
1992-1996 SC300 all issues, $199
1992-1996 SC400 car runs and starts, minimal issues, check engine light works correctly, $249
1992-1996 SC400 car does not run, does not start, does not have a check engine light, has fuel pump related issues, or other severe problems, $299

This Lexus ECU & ECM repair includes replacing bad capacitors, jumping or repairing traces, and board cleaning. We rebuild ECU’s only using the highest quality Japanese Nichicon, Panasonic, Chemi-con, and Rubycon low-ESR capacitors. We purchase our capacitors directly from USA suppliers such as Digi-Key or Mouser. We do not use Ebay capacitors or cheap generic capacitors.

There is a very small chance, less than 10% of the time that your Lexus ECU cannot be repaired due to extensive damage or needing repairs that would exceed the repair price in labor time and effort.  If we spend significant time trying to repair or diagnose your ECU we will also charge the standard diagnosis fee. We will not do this without your approval. If you choose to purchase a replacement Lexus ECU if your ECU is not repairable we will also apply any repair service payment you already made towards the price of a replacement ECU.

Why choose Tanin Auto Electronix?

We have actual SC300 and SC400 test vehicles on site that we use to test your ECU. The first thing we do is plug your ECU into our vehicle and document exactly what issues we are seeing. Then we compare these issues to your work order and described problems. We complete all repairs and then plug your ECU back into our SC300 or SC400. We ensure it passes all tests, starts, idles, and shifts through the gears correctly without triggering any check engine lights.

Ask other companies if they actually plug your ECU into a vehicle to ensure it runs and functions the way it should. They do not. This is a gamble and a potential waste of time for you because if they forget a wire, trace, or problem in your ECU they are relying on YOU to QC their work. This is not how we do business.

The part numbers that this repair service covers is as follows:
89661-24320 CA emissions, M/T 1992-1994 SC300
89661-24380 CA emissions, M/T 1994-1995 SC300
89661-24300 Federal Emissions, M/T, 1992-1994 SC300
89661-24312, 89661-24310, 89661-24311, 89661-24313 Federal Emissions, A/T, 1992-1994 SC300
89661-24320, 89661-24321, 89661-24322 CA Emissions, M/T, 1992-1994 SC300
89661-24333, 89661-24330, 89661-24332, 89661-24331 CA Emissions, A/T, 1992-1994 SC300
89661-24350 Federal Emissions, A/T, 1994-1995 SC300
89661-24360 Federal Emissions, M/T, 1994-1995 SC300
89661-24370 CA Emissions, A/T, 1994-1995 SC300

89661-24231, 89661-24230 Federal Emissions, A/T, 1992-1994 SC400
89661-24240 CA Emissions, A/T, 1992-1994 SC400
89661-24410, 89661-24411 A/T SC400

Let us know if we missed a part number or yours is not listed.

Removal Video




Pick your model and symptoms

SC300 any issues, SC400 starts and runs, check engine light works, SC400 no start or no check engine light


The components we replace come with a lifetime warranty.

Please visit our warranty page for more details.

Service Disclaimer

When you send us your used part and explain your issues, we will diagnose your REPORTED issues. We can make additional recommendations to replace common wear items that frequently fail, but we do not/can not test every aspect of your used part. If something else fails (not related to your original issue or the repairs we performed), we are not responsible and these issues are not covered under your repair’s warranty.

What Happens Next?

Simply print & fill out our repair work order and ship your item to Tanin Auto Electronix!

View our shipping page for more detailed instructions and current turnaround times.


Lexus SC300 1992, 1993, 1994, 1995, 1996
Lexus SC400, 1992, 1993, 1994, 1995, 1996

15 reviews for Repair Service: 1992-1996 Lexus SC300 SC400 ECU Engine Computer Rebuild

  1. Jorge Salinas (verified owner)

    Service was done on a very short amount of time and I am extremely satisfied. Highly recommend the service especially as the first to do when buying an SC300/400!!!

  2. EDGAR L. (verified owner)

    I highly recommend this business to rebuild your ECU. My car runs smooth like new again, 1995 Lexus SC300.
    Great communication and fast turn around.
    Price is very competitive.
    Thank you!

  3. Avdian P. (verified owner)

    Fast simple easy, and great price. Saved another SC400!

  4. Joseph Jenkins (verified owner)

    No check engine light anymore. Did a great job.

  5. Dan M. (verified owner)

    Excellent job! Very satisfied and will be trusting Tanin for all my electronic needs. Thanks so much!

  6. Ernest S. (verified owner)

    Alittle slow on response of problem, but made up for it with Great Customer service and resolve of issues.

  7. LaMar Marable (verified owner)

    Completely satisfied.

  8. John OFlaherty (verified owner)

    Great job and fast turnaround. Thanks—my SC300 drives like a dream again

  9. Siew B. (verified owner)

    This Company Serviced my ECU where it is working fine. The turn around time was pretty fast where I got it back within a week. The only future suggestion is that you should let the customer know what was wrong with the device that was serviced such as Capacitor issue, board issue etc.

  10. Paul N. (verified owner)

    Fast turnaround runs great

  11. Larry K. (verified owner)

    Very happy with the service. I sent them my ECU from my 1992 Lexus SC400 because i was getting confusing diagnostic codes due to an intermittant engine misfire. They examined and tested the ECU and said that it is working properly and there is no need to perform any repairs on it (turns out the problem was a misfiring ignition coil). They then charged me only the diagnostic fee and refunded the additional funds that i had paid for a full service. They could have easily done some form of repair in order to keep the full $149 but they are obviously an honest shop and they do what they say they will do. Cant expect anymore than that from any business.

  12. Mark G. (verified owner)

    Prompt communication when I had questions. Repaired ECU is working fine. I chose your shop over others because you test in actual car before shipping out. Thank you!

  13. Mason (verified owner)

    Capacitors fixed up just fine.

  14. Kent H. (verified owner)

    My ECU was un-repairable but they were able to help me get a replacment and it worked like a charm. Will be doing business with again.

  15. Carey DeRousse

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