Buy Ignition Coil (3.7L, 4.7L) (56028138AF)

The Ignition Coil (3.7L, 4.7L) (56028138AF) is a hcrucial component of the ignition system used in

several Jeep, Dodge, and Chrysler vehicles equipped with the 3.7-liter V6 and 4.7-liter V8 engines. It is

designed to transform the low voltage from the vehicle’s hbattery into the high voltage necessary to create a

spark at the spark plugs. This spark ignites the air-fuel mixture inside the engine cylinders, enabling

combustion and allowing the engine to operate efficiently. Vehicles commonly using this ignition coil

include the Jeep Grand Cherokee WJ, Jeep Liberty KJ, Dodge Dakota, and certain Ram 1500 models with compatible engines.

Each ignition coil, including the 56028138AF, is typically mounted directly on or near the spark plugs in

a “coil-on-plug” configuration. This design eliminates the need for traditional spark plug wires and

improves ignition reliability by delivering voltage directly to the plug. The coil contains two windings: a

primary coil that receives low-voltage current from the battery and a secondary coil that generates the high

voltage required to jump the spark plug gap. When the ignition control module or engine control module

(ECM) signals the coil, it rapidly releases this stored energy, producing a spark at precisely the right moment for optimal combustion.

Moment for optimal combustion

The 56028138AF ignition coil is built from durable materials that can withstand high temperatures,

vibration, and the harsh environment of the engine compartment. It features a high-quality insulation

system to prevent voltage leakage and corrosion-resistant connectors for reliable electrical connections. Its

design ensures long-term durability and consistent performance, which is critical for smooth engine operation, fuel efficiency, and reduced emissions.

Symptoms of a failing ignition coil include engine misfires, rough idling, difficulty starting, reduced power,

poor fuel economy, or illumination of the check engine light. In some cases, the ECM may trigger a “limp mode” to protect the engine when multiple cylinders are misfiring.

Replacing a faulty Ignition Coil (3.7L, 4.7L) (56028138AF) restores proper spark delivery, improves engine performance, and prevents further damage to the ignition system. Regular maintenance and timely replacement of defective coils ensure reliable engine operation and longevity, making this component vital for vehicle performance and drivability.