Cummins ISX12 High-Pressure Fuel Pump – 4395485RX / 439548RX (2010–2016) | Remanufactured

Condition: Fully Remanufactured & Tested
Brand: ACS – Automobile Computer Solutions
Engine: Cummins ISX12
Years: 2010–2016
Core Charge: $800.00 (Refundable)
Availability: Contact ACS for current availability

Product Description

Restore the performance, reliability, and fuel efficiency of your Cummins ISX12 diesel engine with this fully remanufactured high-pressure common-rail fuel pump from ACS – Automobile Computer Solutions.

Designed for Cummins ISX12 engines (2010–2016), this high-pressure fuel pump is professionally rebuilt, inspected, bench-tested, and calibrated to applicable OEM specifications for fuel pressure and delivery.

The high-pressure fuel pump is an essential component of your diesel engine's common-rail fuel injection system. It supplies the high-pressure fuel needed for precise injection, efficient combustion, and dependable engine operation.

A worn or failing fuel pump can contribute to hard starting, reduced engine power, low fuel rail pressure, poor acceleration, and engine derate conditions.

Our remanufactured fuel pump is designed to restore proper fuel delivery and provide a dependable, cost-effective alternative to purchasing a new OEM unit.

OEM Part Numbers & Cross-References

This fuel pump is listed under the following Cummins part numbers and potential cross-references:

• 4395485RX

• 439548RX

• 4395485

• 4384387

• 4384387RX

• 4307700

• 4307049

Important: Part numbers may vary by engine configuration and application. Not all listed references are necessarily interchangeable. Please verify compatibility using your engine serial number (ESN) before purchasing.

Compatible Engines

• Cummins ISX12 – 2010–2016

• Cummins ISX12 EPA10 configurations

• Cummins ISX12 EPA13 configurations

Compatible Truck Manufacturers

Common applications include trucks equipped with compatible Cummins ISX12 engines from:

• Freightliner

• Peterbilt

• Kenworth

• International

• Mack

• Volvo

Common Applications

• Heavy-duty commercial trucks

• Regional hauling trucks

• Vocational trucks

• Refuse and waste collection trucks

• Construction equipment

• Emergency and municipal vehicles

• Industrial diesel applications

Fitment depends on the specific engine serial number and fuel system configuration, not solely on the truck manufacturer or model year.

Why Choose an ACS Remanufactured Fuel Pump?

Fully Remanufactured

Each pump is professionally rebuilt to restore proper mechanical operation and fuel delivery performance.

Inspected and Bench-Tested

Fuel pumps undergo inspection and bench testing to evaluate operation, pressure delivery, and performance.

OEM-Level Performance

Rebuilt and calibrated to meet applicable OEM Cummins fuel system specifications.

Reliable Fuel Delivery

Designed to provide consistent high-pressure fuel delivery for proper common-rail injection system operation.

Cost-Effective Replacement

An economical alternative to purchasing a new OEM high-pressure fuel pump.

Built for Heavy-Duty Applications

Suitable for demanding commercial diesel applications when properly matched to the engine.

Common Symptoms of a Failing High-Pressure Fuel Pump

A failing Cummins ISX12 high-pressure fuel pump may cause:

• Hard starting or extended cranking

• Low fuel rail pressure

• Loss of engine power

• Poor acceleration

• Engine derate or reduced-power conditions

• Rough running or inconsistent performance

• Fuel pressure-related diagnostic trouble codes

• Engine stalling or difficulty maintaining fuel pressure

Note: These symptoms can also be caused by other fuel system components. Proper diagnosis is recommended before replacing the pump.

Core Charge & Refund Policy

Refundable Core Charge: $800.00

This remanufactured Cummins ISX12 high-pressure fuel pump requires an additional $800 core charge.

The core charge is collected at the time of purchase and is separate from the fuel pump selling price.

How the Core Refund Works

1. Purchase your remanufactured fuel pump and pay the applicable $800 core charge.

2. Remove your old fuel pump from the engine.

3. Return the original fuel pump to ACS according to the provided core return instructions.

4. Our team will inspect the returned core for eligibility.

5. Once the core is approved, your $800 core refund will be processed.

Core refunds are subject to the condition and eligibility of the returned pump.

Total Purchase Amount = Fuel Pump Selling Price + $800 Refundable Core Charge

Contact ACS for complete core return requirements and eligibility details.

Shipping & Customer Support

ACS – Automobile Computer Solutions is committed to providing dependable remanufactured diesel components and knowledgeable customer assistance.

Contact our team for product availability, shipping options, core return instructions, and compatibility verification.

Need Help Confirming Fitment?

Not sure whether this high-pressure fuel pump fits your Cummins ISX12 engine?

Our team can help confirm compatibility using your Cummins Engine Serial Number (ESN).

Call ACS – Automobile Computer Solutions

Phone: (305) 456-0505

Providing your ESN before ordering helps ensure you receive the correct high-pressure fuel pump for your engine.

Order Your Cummins ISX12 Fuel Pump Today

Get your Cummins ISX12 diesel engine back to work with a professionally remanufactured and tested high-pressure common-rail fuel pump from ACS – Automobile Computer Solutions.

OEM Reference: 4395485RX / 439548RX
Engine Years: 2010–2016
Refundable Core Charge: $800.00

Contact ACS today to confirm fitment and place your order!