Cummins 3.9L High Pressure Fuel Rail 2015-2018: OEM 4899337
CUMMINS 3.9L HIGH PRESSURE FUEL RAIL 2015-2018: OEM 4899337
ORDERS PLACED BEFORE 3PM EST WILL SHIP SAME DAY
WARRANTY
1M MILES OR 1 YEAR
PRODUCT DESCRIPTION
This is a Genuine New, Bosch High Pressure Fuel Rail, Bosch part number 4899337-OE ( OEM Part Number 4899337 ).This part is primarily made for a Cummins 3.9L, production years 2015-2018, and comes with a One Million Miles or One Year Warranty.
OEM NUMBERS
| Primary OEM | 4899337 |
| Additional OEM | 4899337 |
ADDITIONAL DETAILS
| CONDITION | Genuine New |
| UPC / Barcode | 00840490558083 |
| WEIGHT | 8.00 LBS |
SHIPPING OPTIONS
Ship Weight : 8.00 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 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, 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 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.
"This Product Doesn't Have a Core"
Provide consistent high-pressure fuel distribution with this Cummins 3.9L High Pressure Fuel Rail for 2015–2018 applications. OEM 4899337 stores and distributes pressurized fuel to the injectors, supporting precise fuel delivery and steady engine operation. This fuel rail offers a reliable replacement for a worn, leaking, or damaged unit in compatible Cummins 3.9L engines.
FITMENT CHART
| YEAR | MAKE | ENGINE(S) | ||||
|---|---|---|---|---|---|---|
| 2015 | Cummins | 3.9L | ||||
| 2016 | Cummins | 3.9L | ||||
| 2017 | Cummins | 3.9L | ||||
| 2018 | Cummins | 3.9L | ||||
PEOPLE ALSO ASKS | BLOG(S)
Consistent fuel distribution is a key function of a common-rail diesel injection system. The Cummins 3.9L High Pressure Fuel Rail 2015-2018: OEM 4899337 acts as a central fuel reservoir, receiving pressurized fuel and supplying it to the injectors through dedicated connections for controlled delivery across the engine.
- OEM 4899337 is intended for compatible 2015-2018 Cummins 3.9L diesel applications.
- Stores pressurized fuel temporarily before it is distributed to the individual fuel injectors.
- Multiple injector connections provide dedicated fuel pathways from the rail to the injection system.
- Rigid metal construction is suited for the demanding pressures found in a diesel common-rail fuel system.
- Precision-machined ports help provide secure connections with compatible high-pressure fuel components.
- Centralized fuel distribution allows the injectors to draw from a shared source of pressurized diesel fuel.
- Application-specific shape and mounting points help position the rail correctly within compatible Cummins 3.9L fuel systems.
- Direct replacement configuration makes OEM 4899337 suitable when the original rail is damaged, leaking, or otherwise requires replacement.
The Cummins 3.9L High Pressure Fuel Rail OEM 4899337 provides a durable pathway for storing and distributing high-pressure fuel throughout the common-rail injection system. For customers searching for a Cummins 3.9L fuel rail, high-pressure common rail, diesel injector fuel rail, common rail fuel system component, or OEM 4899337 replacement, this component offers application-specific fitment for compatible 2015-2018 engines.
Accurate testing of High Pressure Fuel Rail pressure helps determine whether a common rail diesel fuel system is supplying the pressure required for starting and normal engine operation. Because these systems operate at extremely high pressures, testing should be performed with approved diagnostic equipment and according to the engine manufacturer’s procedures.
- Scan for fault codes: Check for fuel rail pressure, Fuel Injector, pressure sensor, or fuel delivery-related diagnostic trouble codes.
- Monitor live rail pressure: Use a compatible diagnostic scan tool to view actual High Pressure Fuel Rail pressure reported by the sensor.
- Compare commanded and actual pressure: Evaluate whether measured rail pressure follows the pressure requested by the ECM.
- Check pressure during cranking: Insufficient rail pressure while starting may indicate a fuel supply, pump, injector, or pressure-control problem.
- Test under operating conditions: Compare pressure readings at idle and other manufacturer-specified engine speeds or loads.
- Inspect related components: Check fuel filters, supply lines, the high-pressure pump, pressure control components, and Fuel Injectors when readings are outside specifications.
- Follow high-pressure safety procedures: Never loosen a High Pressure Fuel Rail, injector line, or fitting while the system is pressurized, as high-pressure diesel fuel can cause serious injury.
High Pressure Fuel Rail testing should rely on manufacturer specifications rather than a single universal pressure value. Comparing commanded and actual pressure while evaluating the complete fuel system can help identify whether the problem involves the rail, sensor, pump, injectors, or pressure-control components.
A fuel leak can prevent the system from maintaining the required rail pressure and may contribute to hard starting, reduced power, or pressure-related faults. High-pressure fuel leaks are also a serious safety concern.
Damaged fittings or sealing surfaces can allow high-pressure fuel to escape. Cummins service guidance recommends inspecting rail connections and high-pressure line sealing surfaces for leaks, cracks, scratches, or other damage.
The engine may experience extended cranking, reduced power, unstable operation, or a no-start condition. Low rail pressure can also trigger diagnostic fault codes.
Fuel demand increases as engine load rises, requiring the common rail system to maintain adequate pressure while supplying more fuel. A fuel-system problem may therefore become more noticeable under heavier loads.
Cummins High Pressure Fuel Rails
