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Detroit DD15 High Pressure Fuel Rail 2016-2021: OEM A4720780545

DETROIT DD15 HIGH PRESSURE FUEL RAIL 2016-2021: OEM A4720780545

Shipping ICON

ORDERS PLACED BEFORE 3PM EST WILL SHIP SAME DAY

WARRANTY ICON

WARRANTY
1M MILES OR 1 YEAR

$695.00

CORE CHARGE:

$250.00
iCORE DISCLAIMER: The CORE charge is a 30 day hold and will not be processed as long as the CORE is returned within 30 days. If you do not have a CORE or fail to return the CORE within 30 days, the CORE charge hold amount will be processed at that time.

AVAILABILITY IN STOCK
OEM NUMBERA4720780545
PART TYPEHigh Pressure Fuel Rail
BRANDTamerx Diesel Products
ENGINE MAKEDetroit
ENGINE TYPEDD15
YEAR2016-2021
PART NUMBERA4720780545RM

PRODUCT DESCRIPTION

This is a Remanufactured Tamerx High Pressure Fuel Rail, Tamerx part number A4720780545RM ( OEM Part Number A4720780545 ). All parts are proudly remanufactured in the U.S.A. to the highest of OEM standards, and improvements are often applied to the original design in the remanufacturing process. This part is primarily made for a Detroit DD15, production years 2016-2021, and comes with a One Million Miles or One Year Warranty. For additional warranty info Click Here

OEM NUMBERS

Primary OEMA4720780545
Additional OEMA4720780545

ADDITIONAL DETAILS

CONDITIONRemanufactured
UPC / Barcode
WEIGHT18.00 LBS

SHIPPING OPTIONS

Ship Weight : 18.00 LBS
UPS Ground, 2nd Day Air, Next Day Air

SHIPPING POLICY

Tamerx Diesel Products ships via UPS Ground. Next day air shipping can be arranged for a reasonable price of anywhere from $50.00 - $100.00 depending on the weight of the product and your location. We will do everything we can to make sure that you get the service you need. We understand how important it is to receive your order as quickly as possible.
In most cases Tamerx Diesel Products only needs one address, as long as your product is shipping to the same location as your billing information. In order to eliminate credit card fraud, your billing information must match the credit card you provide.

The terms, conditions, and details of our warranty vary from product to product. Specific warranty details can be found below.

Tamerx Diesel Products provides a replacement warranty on all of our parts. The duration and mileage limitations of the warranty vary by product and are specified on the product's detail page/item listing.

Please note that the warranty covers replacement of the part and the cost of shipping the replacement part to you only. It does not cover any shop, labor, towing, or any similar or related costs. This is not a "money back guarantee".

If you experience a problem with your part or it is not functioning properly, the correct warranty procedure is to call us at (510) 257-1777 (8:00 AM - 5:00 PM ET Monday through Friday). Be sure to have your order number and/or other relevant order information ready so we can easily locate your order and resolve your issue as quickly as possible. From that point, we will review with you any troubleshooting steps that may need to be taken and other areas or systems that can be checked to rule out external problems contributing to your part's issue. If a replacement is determined to be necessary, we will then arrange for your replacement part to ship out ASAP and issue any necessary return shipping labels and/or documents.

As is the case for the majority of the diesel products sold on Tamerx Diesel Products, your part's warranty is active as soon as you install it. In some other cases, warranty activation is contingent upon you sending us your core (i.e., your old part). Tamerx Diesel Products will provide you a return shipping label for parts that have a warranty with a core return condition. When we have received your core return, the part's warranty coverage begins. We reserve the right to void the product warranty if your core is not received within the allotted time, or if it isn't received at all. If the warranty for the diesel part you are purchasing has a core return requirement, it will be clearly noted on the product detail page/item listing.

What is a Core Charge?

A core charge (also called "core deposit") is similar to the deposit you might pay for a can or bottle of soda and is a standard requirement in the auto parts industry. For example, in many states, to promote recycling, you pay a deposit when you purchase a can of soda and receive your deposit back when you return the empty can. Many automotive parts have a core charge, or core price, that works in essentially the same way as a soda can deposit.

30 Day Core Charge Hold

You authorize Tamerx Diesel Products, to hold your credit card for the specified core charge amount and that you agree to return your core with 30 days of receiving the purchased part. When we have received your core return, the hold is released and the core charge payment is canceled.

The customer, or parts buyer, is responsible for any shipping costs associated with core returns unless otherwise specified in the product listing/detail page. Tamerx Diesel Products offers prepaid UPS shipping labels (SKU numbers UPS-CR1 and UPS-CR2) for use in returning your core that are available for purchase on our website during your shopping/order process.

The shipping label you will need to use for the core return is dependent upon what part you are purchasing. UPS-CR1 is good for cores weighing up to 20 pounds. UPS-CR2 is appropriate for shipping cores weighing 21 pounds or more. You must include enough information with the core return that clearly identifies it as a.) a Core Return, and b.) contains enough information we can use to clearly associate the core return with your order. Including a copy of the invoice or packing slip that came with the original shipment, clearly marked "Core Return", is ideal. Alternately, you can include a note marked as "Core Return" that includes your order number, full name and address, and phone number or other contact information. Failure to include this information with your returned core will most likely delay any due core credit being issued and/or delay any applicable warranty activation. Core returns need to be for the exact part purchased and cannot be damaged. Substituting another part in place of the part you have purchased is not acceptable.

All fluids must be drained.

If you have purchased a set or a parts package, you will need to return cores for all components of the set. For example, if you have purchaed a high pressure oil pump with an IPR valve, you will need to return both HPOP and IPR valve cores to receive proper credit. If you have purchased an EGR cooler/EGR valve package, your core return must consist of an EGR cooler core and an EGR valve core, or core credit will not be given.

Core Charges are often mandated by state legislature, and, as such, the actual core charge and taxes on the charge may vary depending on the state in which you buy your part. The Tamerx Diesel Products core charge presented to you online today with your item is representative of the most common core charge.


Deliver steady fuel flow and uncompromising performance with this High Pressure Fuel Rail for Detroit DD15 engines, OEM A4720780545, designed for 2016–2021 models. Engineered to distribute fuel evenly to each injector, this component supports efficient combustion, consistent power output, and reduced emissions under heavy-duty demands. Built to OEM specifications for a precise fit and long-term durability, it’s the ideal solution for keeping your fuel system performing flawlessly. Choose Tamerx for parts that keep your engine working as hard as you do.

FITMENT CHART

YEARMAKEENGINE(S)
2016Detroit DD15
2017Detroit DD15
2018Detroit DD15
2019Detroit DD15
2020Detroit DD15
2021Detroit DD15

PEOPLE ALSO ASKS | BLOG(S)

The high pressure fuel rail is a crucial part of the Detroit DD15 fuel system, ensuring that diesel is delivered evenly and at the correct pressure to each injector. When this component begins to fail, it can lead to serious driveability issues, increased fuel consumption, and engine error codes. The OEM A4720780545 Fuel Rail is designed specifically for 2016–2021 DD15 engines to restore proper fuel delivery and system integrity.

Common Symptoms of a Failing High Pressure Fuel Rail (OEM A4720780545):

  • Hard Starting or No Start – Inconsistent or low fuel pressure can prevent proper ignition.

  • Fuel Leaks – Visible signs of diesel around the rail or fittings can indicate cracks or seal failure.

  • Check Engine Light – Fault codes related to fuel pressure or injector performance.

  • Engine Misfires – Uneven fuel delivery causes rough running or loss of power.

  • Excessive Smoke – Improper fuel atomization can lead to black smoke and inefficient combustion.

Why Choose the OEM A4720780545 Fuel Rail:

  • Designed specifically for Detroit DD15 engines (2016–2021)

  • Maintains consistent high-pressure fuel flow to all injectors

  • Supports proper emissions control and combustion efficiency

  • Built to OEM durability standards for reliability in demanding applications

  • Direct replacement ensures quick, accurate installation

If your Detroit DD15 engine is experiencing fuel pressure issues or showing warning signs like hard starts or smoke, the high pressure fuel rail could be the cause. The OEM A4720780545 Fuel Rail is engineered to restore dependable fuel delivery and keep your engine running smoothly. Shop TamerX Diesel Parts for high-quality OEM components you can trust.

The high-pressure fuel rail plays a critical role in delivering fuel to the injectors with precision. If your engine is experiencing performance issues like misfires, poor acceleration, or hard starting, checking the fuel rail pressure is an important diagnostic step. Testing fuel rail pressure requires proper tools and safety precautions to avoid damage or injury.

Steps to Test High-Pressure Fuel Rail Pressure:

  • Use a Diagnostic Scan Tool – Most modern vehicles allow you to access live fuel rail pressure data through the OBD-II port using a compatible scan tool.

  • Check Manufacturer Specifications – Before testing, know the normal operating pressure range for your specific engine model.

  • Monitor Live Readings – With the engine running, compare the actual fuel rail pressure to the expected range at idle and under load.

  • Look for Pressure Drops – Rapid drops in pressure during acceleration or cranking may indicate a weak pump, leaking injector, or faulty regulator.

  • Inspect for Stored DTCs – Fault codes related to fuel pressure (such as P0087 or P0191) can help pinpoint issues.

  • Advanced Testing with Mechanical Gauge (if applicable) – Some systems allow the use of a high-pressure fuel gauge, but this is typically reserved for trained professionals due to safety risks.

  • Observe Fuel Trim and Engine Behavior – Inconsistent pressure may also reflect in long-term or short-term fuel trim values, helping to diagnose underlying causes.

Testing high-pressure fuel rail pressure is essential for diagnosing fuel delivery problems. Whether using a scan tool or mechanical gauge, always follow manufacturer guidelines and safety procedures. If you’re unsure or lack the proper equipment, consulting a professional technician is the safest and most effective approach.

 

Yes, if fuel pressure is erratic or low, the engine may struggle to start or run smoothly.

Common signs include injector misfires, check engine lights, or rough idling.

Internal cleaning is not recommended due to the precision design and risk of contamination.

Use clean fuel, change filters regularly, and avoid running the engine with known fuel issues.

Detroit High Pressure Fuel Rails

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