High Output Alternator for RAM ProMaster City (2015-2022) 2.4L

High-Amp 300A Alternator for 2015-2022 RAM ProMaster City (VM)

What it Does: The 300A high-output alternator replaces the factory charging unit on the 2015-2022 RAM ProMaster City to supply continuous amperage for auxiliary electrical loads and eliminate system voltage drops at idle.

The Stock RAM ProMaster City Charging Deficiencies

The factory 160-amp alternator on the VM chassis struggles under sustained commercial and aftermarket electrical demands. Heavy accessory draws—such as commercial inverter setups, auxiliary refrigeration units, high-draw work lighting, or aftermarket audio amplifiers—exceed the stock stator capacity. Under sustained thermal stress, the OEM diode bridge suffers heat soak, creating voltage ripple and dropping system voltage below 12.8V at idle. This leads to premature battery sulfation, slow starter cranking, flickering instrumentation, and parasitic drain on the 2.4L Tigershark MultiAir II powertrain electronics.

The Engineering Solution

Engineered for sustained heavy-duty duty cycles, this 300-amp replacement delivers high-output performance directly through hair-pin style, heavy-gauge copper stator windings and a precision-balanced rotor. Low-friction sealed bearings prevent axial play and front-drive belt squeal under high load. An upgraded internal solid-state voltage regulator manages thermal compensation dynamically, maintaining a consistent 13.5V to 14.5V output band across operating temperatures. It utilizes the factory mounting architecture, OE-spec pulley diameter, and standard harness plug to directly supersede factory units like OEM part 56029624AB and Mitsubishi interchange A002TX3581ZC with zero bracket modification.

What's Included

• 1 High Output 300-Amp Alternator (Part # 11554)

Technical Specifications

Compatibility

• 2015-2022 RAM ProMaster City Tradesman Cargo Van 2.4L I4
• 2015-2022 RAM ProMaster City Tradesman SLT Cargo Van 2.4L I4
• 2015-2022 RAM ProMaster City Wagon Passenger Van 2.4L I4
• 2015-2022 RAM ProMaster City Wagon SLT Passenger Van 2.4L I4

Frequently Asked Questions & Fitment Warnings

Does this fit the VM ProMaster City?

Yes, this is a direct fit for the 2015-2022 RAM ProMaster City equipped with the 2.4L Tigershark engine.

Do I need to upgrade the main charging cables during installation?

While this unit functions with the OEM harness, a Big 3 wiring upgrade using 1/0 AWG power and ground cables is strongly recommended to achieve full 300-amp throughput without thermal resistance.

The RAM Work-Ready Standard

Built to handle continuous commercial fleet duty, heavy payload cycling, and commercial auxiliary draws, this high-output alternator delivers dependable charging integrity under extreme engine-bay heat.