Is Your 2005-2006 Grand Cherokee Acting Up?
There’s nothing more frustrating than a vehicle you can’t rely on. If your Jeep Grand Cherokee is suddenly stalling, running rough, refusing to start, or flashing a persistent check engine light, a failing Engine Control Module (ECM) is a very likely culprit. As the brain of your 3.7L engine, when the ECM starts to go, it can cause a cascade of confusing and unpredictable problems, leaving you stranded and facing a costly trip to the dealership.
Over my 20+ years in the shop, I’ve seen countless WK-generation Grand Cherokees with these exact issues. The symptoms can range from poor fuel economy and hesitation to complete communication loss with the rest of the vehicle’s systems. The good news is, you don’t need a complicated and expensive dealership repair to solve the problem.
The Direct-Fit Solution for Your 3.7L 4×4
This Engine Control Module is the straightforward, reliable solution you’ve been looking for. It’s not just a replacement part; it’s a complete fix that arrives at your door ready for installation. We handle all the complex programming for you. Simply provide your vehicle’s VIN and current mileage during checkout, and our technicians will flash the module with your Jeep’s specific data. The result is a true plug-and-play component that restores your vehicle’s original performance and reliability.
Expert Pro Tip: Check Your Connections First
Before you swap the module, take a moment to inspect the wiring harness connectors that plug into the ECM. On these Grand Cherokees, the ECM is located in the right-hand rear of the engine compartment, where it can be exposed to moisture. Unplug the connectors and look for any signs of green or white corrosion on the pins. Cleaning them with a dedicated contact cleaner and a small brush can sometimes resolve intermittent issues and will ensure a perfect connection for your new module.
Common Symptoms of a Failing 2005-2006 Grand Cherokee ECM:
- โ Unexplained stalling or engine cutting out while driving
- โ Harsh or erratic automatic transmission shifting
- โ No-start condition where the engine cranks but won’t fire up
- โ Persistent Check Engine Light (CEL) with communication-related codes (like U-codes or P0601)
- โ Noticeable drop in fuel efficiency
- โ Misfires or rough idling that can’t be traced to spark plugs or coils
- โ Instrument cluster lights flickering or acting erratically
Plug-and-Play Installation: No Dealer Visit Required
You can get your Grand Cherokee back on the road yourself and save hundreds in labor and programming fees. The installation is simple and requires only basic hand tools.
- Safety First: Disconnect the negative terminal from your vehicle’s battery and wait at least 15 minutes for the system capacitors to discharge.
- Locate the ECM: Open the hood and find the Engine Control Module. It’s mounted in the right-hand (passenger side) rear corner of the engine compartment.
- Disconnect the Connectors: Carefully release the locking tabs on the wiring harness connectors and pull them straight out from the old module.
- Remove the Old Module: Unbolt the mounting hardware holding the original ECM in place and remove it from the vehicle.
- Install the New Module: Mount your new, pre-programmed ECM in the same location and secure it with the original hardware.
- Reconnect Everything: Firmly plug the wiring harness connectors into the new module until they click into place. Reconnect the negative battery terminal.
- Final Step: Start your engine! Your Jeep is now ready to drive with its brain fully restored.
Guaranteed Compatibility
This module is a direct replacement for 2005-2006 Jeep Grand Cherokee models equipped with the 3.7L engine and 4×4 drivetrain. It is fully compatible with the following original equipment part numbers:
05094895AB, 05094898AA, 05094898AB, 05094898AC, 05094898AD, 05094898AE, 05094898ZB, 56044742AC, 56044742AD, 05094898AF
By ordering this part, you are choosing a tested, reliable component that eliminates guesswork and gets you back to enjoying your Jeep the way it was meant to be driven.