Also known as

Engine Control Unit

ECU

Powertrain Control Module

PCM

DME

Digital Motor Electronics

What this part does

The Engine Control Module acts as the central brain for the engine management system. Mounted under the cowl panel in the engine bay, it continuously processes input from various engine sensors to adjust fuel injection duration, ignition timing, and emission controls. It precisely regulates the variable valve timing and the electronic throttle body to maintain optimal air-fuel ratios for the 3.6L VR6.

When this module begins to fail, the vehicle often exhibits a crank-but-no-start condition, random stalling at operating temperature, or multiple unexplained misfire codes. A completely failed unit will typically lose all communication with an OBD2 diagnostic scanner and prevent the fuel pump from priming.

Fits these vehicles

OEM and interchange numbers

03H906023A

03H-906-023-A

03H 906 023 A

Before you order

This module is tied to the vehicle's immobilizer system. It will not start the vehicle simply by plugging it in. It requires specialized programming, adaptation, or cloning by a qualified shop using dealer-level diagnostic tools (such as PIWIS or ODIS) to sync with your existing ignition keys and instrument cluster.

Water intrusion from clogged cowl drains is a common cause of failure for computers in this location. Thoroughly inspect your vehicle's wiring harness connectors for green corrosion or moisture, and clear out any debris in the cowl area before installing the replacement to prevent damaging the new unit. Always verify that your original part number exactly matches 03H906023A.