1998-2000 Lexus SC300 ECU to Key Programming Service
1998-2000 Lexus SC300 ECU to Key Programming Service
How our process works (Service)

1998-2000 Lexus SC300 ECU to Key Programming Service | Engine Computer Immoblizer


This service will program a new 4C transponder master key to your original ECU.

Compatible with Lexus SC300 1998, 1999, 2000.

Available for all engine sizes, transmissions and trims.

(See description below for more details)

SKU SC300-33470-ECU-PROGRAMMING Categories , , ,


Lost your SC300 key?

Security light flashing when trying to start the vehicle?  

Want to avoid spending $1000’s of dollars at the dealership? 

We can help! 

Simply send us your original ECU (Engine control unit) and we will program a new master key to the unit for you!  (See how below)

Our key programming service is a cheaper alternative to a locksmith or replacing the ECU, saving you money and allowing you to keep your original parts.


A hassle free 2-year warranty and 24 -48-hour turnaround time is included with every service.

The entire process from start to finish typically takes 5 to 7 business days including transit times. (From your door to ours, back to yours.)

Our service only includes return shipping. (You would pay to ship the unit to us, we do not include a shipping label.)

To ship your unit, we recommend using a USPS Priority Flat Rate Envelope. Average transit times are about 2 business days for around $8.00 but you may use any carrier you like.

The key we provide will be programmed directly to the ECU, no programming on your end is required, just have the key we provide cut to fit your ignition.

We do not cut keys; you will have to have the key cut to fit your ignition by a locksmith or dealer.

Having the key cut typically costs around $40 and can done using your VIN along with proof of ownership. The vehicle will not need to be present.

Remote keys will include a battery and come assembled.

You will receive the same key show in photos.

To send your unit in for service please follow these steps;

  1. Remove the ECU from vehicle.
  2. Purchase the service by clicking the Buy Now button Above. (Pre-paying for the service will speed up handling times)
  3. Include the same name used to place the order on or inside the package. That name is your receipt.
  4. Using any shipping service, ship the unit to

Module Mechanics
6732 W. Coal Mine Ave
STE 511
Littleton, CO 80123

✓ That’s it, you’re done!

When we receive the unit, we will complete the service and ship it back within 24-48 hours.

A tracking will be emailed to your inbox as soon as the service has been completed.

Re-install and start the car using the key we provided, no additional programming or calibration needed.

Technician’s notes:

Between the years 1998 to around 2005, Lexus and Toyota immobilizer systems were a big issue. The vehicle came with 2 master keys and a valet key. If for any reason you lost all your master keys, you were unable to program more keys to the ECU making only a new and very costly ECU replacement from the dealer the only option to have new keys programmed. It wasn’t until the later models they fixed this problem.

To this day most Lexus and Toyota dealers do not have a way to program a key to the old engine computer making a new replacement the only option if all the master keys have been lost. This can cost upwards of $3000 on some models!

Don’t let a lost key send your vehicle to the junk yard prematurely, let us program a key for you at a fraction of what the dealer would charge.

We understand for some, a vehicle is a part of the family. That’s why our mission is to get your vehicle back on the road by offering quick and cost-effective solutions.

Don’t hesitate to reach out if you have any other questions, we are always here to help!

-Module Mechanics

Additional information


1998, 1999, 2000





Part Number

89661-24570, 89661-3A350, 89661-24551, 89661-24550, 89661-24581, 89661-24580

Other Number

8966124570, 896613A350, 8966124551, 8966124550, 8966124581, 8966124580

Lexus Key Options

1 Master Key, 1 Master Key with Lexus Logo, 2 Master Keys, 2 Master Keys with Lexus Logo

  • 2 Year Money Back Guarantee

  • 2 year warranty included with purchase, optional 5 year available.
  • Warranty will begin on the day tracking confirms delivery.
  • We do not reimburse for shipping and/or labor costs.
  • Return shipping labels are not currently provided.
  • Some units may not be repairable due to age, wear, symptoms or previous repair attempts.
  • For simplicity and fairness, we will not impose a diagnosis fee for unrepairable units.
  • Warranty work may not be available for some units & a refund will be offered instead.
  • Buyer assumes all responsibility confirming part function after installation & during road use.
  Having an issue? We’re here to help! Email us: support@modulemechanics.com


Our mission is providing unique and cost saving solutions to combat the automotive industries problematic electronic issues, keeping you in your car, not your wallet. 

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Our Shipping Address

Module Mechanics

6732 W. Coal Mine Ave, STE 511, Littleton, CO 80123

*Please include your name or order number with the shipment

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If you have any question, please contact us at info@modulemechanics.com
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