Programmed 2000-2002 Saturn S Series ECM | 21024986 | Plug & Play

End Your Saturn’s Running Problems

Tired of stalling, rough idling, or a persistent check engine light? Restore your Saturn’s reliability with this pre-programmed ECM. We flash it to your specific VIN, so you can simply plug it in and get back on the road with confidence. Stop worrying about your car and order your simple, effective solution today!

$149.95

+11.99 USPS Priority Shipping

Availability: In stock



Guaranteed Safe Checkout

Restore Your Saturn’s Dependability and Performance

Is your reliable Saturn S Series suddenly giving you trouble? Stalling at stoplights, running rough, or flashing a persistent check engine light can be incredibly frustrating. These are classic signs that your vehicle’s Engine Control Module (ECM), the central computer, is failing. Don’t let a faulty computer keep your car off the road. This pre-programmed ECM is the simple, effective, and affordable solution to get your Saturn running smoothly again, restoring the dependability you count on every day.

Common Symptoms & Your Solution

A failing ECM can cause a wide range of confusing issues. If you’re experiencing any of the following, this part is your definitive solution:

  • Check Engine Light: Often with codes like P0601, P0603, or P0606 indicating an internal computer fault.
  • No-Start or Hard Starting: The engine cranks but refuses to start, or only starts after many attempts.
  • Stalling and Rough Idle: The engine may stall unexpectedly while driving or idle erratically.
  • Poor Fuel Economy: A sudden and unexplained drop in your miles per gallon.
  • Erratic Automatic Transmission Shifting: Harsh shifts, slipping, or failure to shift into gear.

This unit is a direct-fit replacement, and our expert programming service makes the repair process straightforward. We take a quality, used OEM unit and flash it with the latest GM software updates specifically for your vehicle’s VIN. This ensures that when you receive your 2000-2002 Saturn S Series ECM, it’s ready for a true plug-and-play installation.

Features & Benefits

  • ✔ VIN-Programmed for Your Saturn: We flash the module with your specific vehicle information, eliminating the need for an expensive trip to the dealership for programming.
  • ✔ Plug-and-Play Installation: Once programmed, simply disconnect the old unit (located behind the battery) and plug this one in. No complex security relearn procedures are required.
  • ✔ Cost-Effective Repair: Get the reliability of an OEM part without the high cost of a new computer from the dealer.
  • ✔ Guaranteed Compatibility: This ECM is a direct replacement for part numbers 21025110, 21025128, 21009349, and 21024986.
  • ✔ Restored Performance: With the latest software updates, your engine and transmission will operate at peak efficiency and smoothness.
  • ✔ This unit is backed by our one-year replacement warranty.

Expert Insight: Why Programming is Non-Negotiable

From my 20 years of experience, I’ve seen countless Saturn owners buy a used computer from a salvage yard only to find their car still won’t start. That’s because the Saturn Vehicle Theft System (VTS) is tied directly to the original ECM. A mismatched computer will prevent the fuel injectors from firing. Our professional programming service not only loads your VIN but also correctly syncs the security information, making this 2000-2002 Saturn S Series ECM truly ready to install. It’s the critical step that saves you from a tow to the dealer and hundreds in diagnostic and programming fees.

Frequently Asked Questions

Is this ECM ready to install right out of the box?

Yes! After you place your order and provide us with your vehicle’s VIN, we will program the module. When it arrives, it is completely ready for a plug-and-play installation. No further programming is needed.

Where can I find my vehicle’s VIN?

Your 17-digit Vehicle Identification Number (VIN) can be found on a metal plate on the driver’s side of the dashboard (visible through the windshield), on the driver’s side door jamb sticker, or on your vehicle’s registration and insurance documents.

Will this fix my check engine light?

This ECM will resolve any check engine light and running issues directly caused by a faulty computer (like internal processor fault codes). However, if your vehicle has other mechanical or electrical problems, the check engine light may remain. Proper diagnosis is always recommended.

My original part number is different. Will this still work?

Absolutely. This module is a direct replacement for several part numbers, including 21025110, 21025128, 21009349, and 21024986. As long as your vehicle is a 2000-2002 Saturn S Series with an automatic transmission, this is the correct part for you.

What tools do I need for installation?

Installation is simple and typically only requires basic hand tools, such as a socket set to disconnect the battery and remove the bracket holding the ECM in place. The 2000-2002 Saturn S Series ECM is located in the engine compartment on the driver’s side, just behind the battery.

MPN

21025128

Year
Conditions & Options

Programmed to your VIN GM: 21025110 21025128 21009349 21024986

Genuine OEM

Yes

Condition

Refurbished

PartNumber

590

Model

SATURN S SERIES

Make

Year

2002

Brand

Saturn

Manufacturer Part Number

, , ,

Interchange part number

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