Is Your 2002 Chrysler 300M Running Rough? The ECM Might Be the Culprit.
If you’re experiencing frustrating and unpredictable issues with your 2002 Chrysler 300M, Concorde, or Intrepid, the root cause might be something you haven’t considered: a failing Engine Control Module (ECM). The ECM is the central computer of your vehicle, responsible for managing everything from fuel injection and ignition timing to transmission shifting and emissions control. When it starts to fail, it can create a cascade of problems that are often misdiagnosed, leading to costly and unnecessary repairs. This replacement engine computer, part number 04606873AA, is the definitive solution to restore your vehicle’s performance and reliability.
A few months back, a 2002 Intrepid R/T with the 3.5L engine was towed in. The owner was at his wit’s end. He had replaced the spark plugs, ignition coils, and even the fuel pump, but the car would still stall randomly at stoplights and hesitate badly on acceleration. The check engine light was on, but the codes were intermittent and pointed to multiple, unrelated sensors. After checking all the wiring and grounds, we hooked up our advanced scanner and monitored the live data from the ECM. We saw erratic signals and data dropouts that confirmed our suspicion: the main processor in the ECM was failing. We installed one of these pre-programmed units, and the car immediately fired up and ran perfectly. It’s a classic case where the ‘brain’ was the problem, not the ‘body’.
Common Symptoms of a Failing Engine Computer
- ✔ Check Engine Light: The light is on, or it flashes intermittently with no clear cause.
- ✔ Engine Stalling or Misfiring: Your vehicle may stall unexpectedly while driving or at idle, and you might feel random engine misfires or hesitation.
- ✔ Poor Performance & Fuel Economy: A noticeable drop in power, sluggish acceleration, and a significant decrease in your miles per gallon (MPG).
- ✔ Starting Issues: The engine cranks but refuses to start, or it takes multiple attempts to get it running, even with a good battery and starter.
- ✔ Inconsistent Shifting: If your vehicle has an automatic transmission, you may experience harsh, delayed, or erratic shifting as the ECM fails to communicate properly with the transmission controller.
- ✔ No Communication with Scan Tools: A clear sign of a major internal failure is when a diagnostic scan tool cannot connect to the ECM at all.
Why Choose Our Programmed 2002 300M Engine Computer?
Getting your vehicle back on the road shouldn’t be a complicated ordeal. That’s why we offer a true plug-and-play solution. Unlike a generic module from a parts store or a salvage yard, this 2002 300M Engine Computer is specifically prepared for your vehicle. When you place your order, we use the Vehicle Identification Number (VIN) you provide to flash the module with the correct factory software and programming. This critical step ensures that the computer recognizes your car’s specific configuration, including the anti-theft system (SKIM) and other integrated electronics. The result is a seamless installation process that requires no additional programming or expensive trips to the dealership.
Guaranteed Compatibility and Fitment
This module is a direct replacement for several part numbers, ensuring a perfect match for your vehicle. It is fully compatible with the following part numbers:
- 04606873AA
- 04606873AB
- 04606873AC
It is designed to fit the following vehicles equipped with the 3.5L engine (VIN G):
- 2002 Chrysler 300M (excluding Special models)
- 2002 Chrysler Concorde (Limited models)
- 2002 Dodge Intrepid (R/T and ES models)
Located in the LH front of the engine compartment, swapping out the old module is a straightforward job for any DIY mechanic with basic tools. Simply disconnect the battery, unplug the electrical connectors from the old ECM, unbolt it, and install the new one in its place. Reconnect everything, and you’re ready to go. Restore the precision engineering and smooth operation of your Chrysler or Dodge with a reliable, correctly programmed 2002 300M Engine Computer.
Frequently Asked Questions
Is this engine computer truly plug-and-play?
Yes. We program the module using your vehicle’s VIN before it ships. This ensures it has the correct software and security information, allowing you to install it without needing any additional programming from a dealer or specialized mechanic.
Where do I find my vehicle’s VIN?
Your 17-digit VIN can be found on your vehicle’s registration, your insurance card, or on the driver’s side of the dashboard, visible through the windshield. It is also typically located on a sticker inside the driver’s door jamb.
What is the difference between part numbers 04606873AA, AB, and AC?
The letters at the end (AA, AB, AC) typically indicate minor revisions or software updates from the manufacturer over time. Our modules are programmed with the latest compatible software, making this unit a proper replacement for any of these part numbers.
Will this fix my check engine light?
If the check engine light and the associated diagnostic trouble codes (DTCs) are being caused by a faulty ECM, then this part will resolve the issue. However, it’s important to ensure that the codes are not being caused by a separate faulty sensor or wiring problem. This module fixes the computer itself, not external vehicle issues.
Do I need to do anything after installation?
No special procedures are required. After installing the module and reconnecting the battery, you can start the car and drive it. The computer will perform its own self-tests and begin operating normally. It’s always a good practice to clear any old fault codes with a basic scanner after the installation is complete.