Alternator 56044380AJ 12V 150A Jeep Commander Grand Cherokee
Applicable models:JEEP Commander,JEEP Gand Cherokee
Reference part number:56044380AA 56044380AB 56044380AC， 56044380AD 56044380AE 56044380AF， 56044380AG 56044380AH 56044380AJ 56044380AI， 2100805 12984 4210000660 421000550，4210000551，4210000552，4210000550 56044380
| Rated output : | 12V 150A |
| Pulley : | 6PK |
| Size : | 24*18*17 single unit inner box |
| Weight : | net weight：5.7KG gross weight：6.0KG |
| Packaging : | Neutral kraft paper packaging |
| Spot/Pre sale : | Spot goods |
| Warranty : | 1 year |
| Product number : |
| Type : | ACgenerator Alternator |
| Specification : | 12V 150A |
| Pulley : | 6PK |
| Brand : | nuojin |
| Number : | 56044380AJ |
| Quality : | new |
| Delivery time : | 10 day |
Product Attributes
| Rated output | 12V 150A |
| Pulley | 6PK |
| Size | 24*18*17 CM single unit inner box |
| Weight | net weight: 5.7KG gross weight: 6.0KG |
| Packaging | Neutral kraft paper packaging |
| Spot/Pre sale | Spot goods |
| Warranty | 1 year |
Product Details
| Type | AC generator Alternator |
| Specification | 12V 150A |
| Pulley | 6PK |
| Brand | nuojin |
| Part Number | 56044380AJ |
| Quality | new |
| Delivery time | 10 days |
Product Overview
The 56044380AJ is a Jeep OE-spec replacement alternator delivering 12V 150A output with a 6-rib (6PK) pulley, engineered for the Jeep Commander and Grand Cherokee III with the 5.7 HEMI V8 and 6.1 SRT8 V8 engines. This aftermarket unit matches the original charging-system specification of these Mopar family SUVs.
Fitted with internal regulator design, this brand-new alternator is stocked in-house with a 1-year warranty and 10-day dispatch lead-time. The 150-amp rating is factory-correct for the stock electrical load of these SUVs, supporting climate control, heated and powered accessories, infotainment and the battery-charge management strategy.
Key physical specs: net weight 5.7 kg, gross weight 6.0 kg, overall dimensions 240 x 180 x 170 mm, supplied inside neutral kraft inner carton.
The HEMI V8 Platform and 150A Charging System
The Jeep Commander (XK, XH) and Grand Cherokee III (WH, WK) share the Mopar full-size SUV architecture with the 5.7 HEMI V8 (engine code EZB, 5654 cc, 240 kW) and the 6.1 SRT8 V8 (engine code ESF, 6059 cc, 313 kW). These engines carry a substantial factory electrical load from climate control, seating and infotainment systems.
This unit is specified as 12V 150A, matching the factory charging-system specification of these platforms. The 6-rib pulley matches the original accessory-belt layout, driving alternator, water pump and power-steering pump. Installing a pulley with the wrong rib count will cause belt mis-tracking, slippage, premature belt wear and charging faults. Always cross-check against your old alternator before ordering.
Technical Specifications
| Parameter | Specification |
|---|---|
| Jeep OE numbers | 56044380AJ, 56044380AA, 56044380AB, 56044380AC, 56044380AD, 56044380AE, 56044380AF, 56044380AG, 56044380AH, 56044380AI |
| Reference/OEM cross | 2100805, 12984, 4210000660, 421000550, 421000551, 421000552, 4210000550 |
| Voltage | 12V |
| Amperage | 150A |
| Pulley | 6-rib fixed pulley (6PK) |
| Regulator | Internal |
| Engine | 5.7 HEMI V8 (EZB) / 6.1 SRT8 V8 (ESF) |
| Quality | NEW |
| Warranty | 1 year |
| Net Weight | 5.7kg |
| Gross Weight | 6.0kg |
| Dimensions | 240 x 180 x 170mm |
| Packaging | Neutral kraft box |
| Lead Time | 10 days, in stock |
Engine Compatibility and Cross Reference
This alternator fits the Jeep Commander and Grand Cherokee III with the 5.7 HEMI V8 (EZB) and 6.1 SRT8 V8 (ESF). The fitment table lists Commander 2005-2010 and Grand Cherokee 2005-2010, with the SRT8 from 2006-2010. Do not rely solely on vehicle model name for fitment validation; always verify engine code, old-part OE number, pulley rib-count and amp label on your original alternator.
| Make / Model | Engine Code | Displacement | Year |
|---|---|---|---|
| Jeep Commander (XK, XH) 5.7 HEMI V8 4x4 | EZB | 5654 cc, 240 kW | 2005-2010 |
| Jeep Grand Cherokee III (WH, WK) 5.7 V8 4x4 | EZB | 5654 cc, 240 kW | 2005-2010 |
| Jeep Grand Cherokee III (WH, WK) 6.1 SRT8 4x4 / RWD | ESF | 6059 cc, 313 kW | 2006-2010 |
Multiple Jeep and supplier OE numbers appear across production batches and regional market specifications for this same alternator family. If your original unit bears one of the listed cross-reference numbers, 56044380AJ serves as a direct drop-in replacement.
What to Look for in a Replacement
Follow these five verification steps before placing your order to avoid wrong-part returns:
1. Check the amperage label on your old alternator: confirm it is rated for 150A. Different amp ratings are not interchangeable.
2. Count pulley ribs: this unit requires 6PK (6-rib). Units with a different rib count are incompatible for this accessory drive setup.
3. Confirm the engine code (EZB 5.7 HEMI or ESF 6.1 SRT8) and production year of your vehicle.
4. Match against OE / reference part numbers stamped on your original housing.
5. Weight cross-check: genuine matching unit weighs approximately 5.7 kg net; significant weight difference indicates wrong assembly.
Application Scenarios
Independent repair shops and Mopar specialists servicing Commander and Grand Cherokee models across North America, Europe, Asia-Pacific, Latin-America and the Middle East.
Parts counters and jobbers stocking Jeep family replacement electrical components.
Vehicle owners restoring and maintaining original-spec HEMI-powered SUVs.
Workshops performing charging-system restoration on high-load Mopar platforms.
Owners with standard accessory loads who require a factory-spec charging system.
FAQ
Q: Which vehicles does this alternator fit?
A: It fits the Jeep Commander and Grand Cherokee III with the 5.7 HEMI V8 (EZB) and 6.1 SRT8 V8 (ESF). The fitment table lists Commander 2005-2010 and Grand Cherokee 2005-2010, with the SRT8 from 2006-2010. Always verify against the OE number, pulley and mounting layout of your original alternator before ordering.
Q: Is this alternator new?
A: Yes, this is a brand-new unit with a 1-year warranty and 10-day dispatch lead-time.
Q: My old alternator shows OE number 56044380AA or 4210000660, will 56044380AJ work?
A: Yes. These numbers belong to the same alternator family, differing only by production revision and market specification. It serves as a direct replacement.
Q: What is the normal charging voltage after installation?
A: With the engine running, output voltage should read 13.8V-14.5V; the 150A rating supports the full electrical load of these HEMI SUVs.
Q: What is your warranty and lead-time?
A: Goods are in stock with a 10-day dispatch lead-time. A 1-year warranty applies from installation date; warranty excludes damage caused by mis-installation, wrong belt tension, or vehicle-wiring faults.
In Practice
For technicians working on Mopar SUV platforms: Before removing the existing alternator, perform charging-system diagnostics. Measure battery terminal running voltage with a multimeter. Weak batteries, corroded ground connections or a faulty main harness can mimic alternator failure symptoms. Always disconnect the battery negative terminal before commencing removal work.
Take photos of wiring connectors and bolt positions during disassembly to avoid mis-routing during reassembly. Observe correct belt tension: 10-15 mm deflection when pressing the belt mid-span. Over-tightened belts accelerate alternator bearing wear; loose tension creates slipping and insufficient charging. Torque mounting bolts to Jeep workshop-manual specifications.
Inexperienced home mechanics are recommended to entrust replacement work to a qualified auto-electric repair shop. Incorrect wiring risks burning the alternator or vehicle-system components.
References
Vehicle applications are compiled from the original equipment fitment data for the 56044380AJ alternator family covering Jeep Commander (XK, XH) and Grand Cherokee III (WH, WK) with the 5.7 HEMI and 6.1 SRT8 V8 engines, verified against actual vehicle installation tests and after-sales maintenance experience.
