Cardone 79-7421 Engine Control Module

Engine Control Module for 1991 Dodge Shadow and Plymouth Sundance

Restore engine management performance with this remanufactured Cardone Engine Control Module, part number 79-7421. It is built for direct replacement use on select 1991 Dodge Shadow and Plymouth Sundance applications with California Emission System equipment and OE numbers 4557421 or 4686560.

Key Features

• Remanufactured Original Equipment-style ECM for a precise vehicle fit
• 1 rectangle connector with 60 male pin terminals
• Plastic housing with 2 mounting holes
• Factory pre-programmed for the listed application; no flash programming required
• Critical internal components are re-soldered or replaced during remanufacturing
• Computer tested for electrical function and reliability
• Earth-conscious remanufacturing process reduces raw material and energy use versus new part production

Product Details

Cardone Engine Control Module 79-7421 is a remanufactured ECM designed to meet OE fit and function for the listed Chrysler applications. The Cardone Engine Control Module line focuses on correcting common failure points found in original units, with reverse engineering used to identify design weaknesses and restore dependable operation. This part cross-references Dodge and Plymouth OE numbers 4557421 and 4686560 for the same application.

Fits 1991 Dodge Shadow, N/A, with California Emission System and OE numbers 4557421, 4686560. Fits 1991 Plymouth Sundance, N/A, with California Emission System and OE numbers 4557421, 4686560.

Common Problems This ECM Can Address

• No-start or intermittent start condition caused by a failed engine control module
• Driveability issues related to incorrect fuel or ignition control
• Check engine concerns traced to internal ECM failure
• Electrical faults caused by damaged solder joints or worn internal components
• Replacement needs after diagnosis confirms the original module has failed

Installation Notes and Tips

• Verify the OE number on the original module before ordering to confirm the correct Cardone 79-7421 replacement.
• Inspect power, ground, wiring harness condition, and related relays or solenoids before installing the new ECM.
• Confirm the vehicle has the California Emission System configuration listed in the fitment data.
• This unit is pre-programmed at the factory and does not require flash programming.
• Follow an OE service manual for diagnosis and installation procedures.

Quality Assurance

Each Cardone remanufactured ECM is computer tested after critical components are repaired or replaced. The remanufacturing process is performed at Cardone’s Philadelphia manufacturing plant and is intended to restore reliable operation for the listed 1991 Dodge Shadow and Plymouth Sundance applications.