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John Deere 4TNV86 High Pressure Fuel Rail 2014-2021: OEM MIA882019

JOHN DEERE 4TNV86 HIGH PRESSURE FUEL RAIL 2014-2021: OEM MIA882019

Shipping ICON

ORDERS PLACED BEFORE 3PM EST WILL SHIP SAME DAY

WARRANTY ICON

WARRANTY
1M MILES OR 1 YEAR

$1,195.00

CORE CHARGE:

$150.00
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 NUMBERMIA882019
PART TYPEHigh Pressure Fuel Rail
BRANDBosch
ENGINE MAKEJohn Deere
ENGINE TYPE4TNV86
YEAR2014-2021
PART NUMBER129C00-57000
APPLICATION NOTESTier 4 Final

PRODUCT DESCRIPTION

This is a New, Bosch High Pressure Fuel Rail, Bosch part number 129C00-57000 ( OEM Part Number MIA882019 ).This part is primarily made for a John Deere 4TNV86, production years 2014-2021, and comes with a One Million Miles or One Year Warranty. For additional warranty info Click Here

OEM NUMBERS

Primary OEMMIA882019
Additional OEM129C-57000, MIA882019

ADDITIONAL DETAILS

CONDITIONNew
UPC / Barcode00840490542396
WEIGHT5.00 LBS

SHIPPING OPTIONS

Ship Weight : 5.00 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.


Built for efficiency and precision, the John Deere 4TNV86 High Pressure Fuel Rail OEM MIA882019 ensures reliable fuel delivery and pressure regulation in engines manufactured between 2014 and 2021. This genuine OEM component distributes fuel evenly to the injectors, supporting consistent combustion, smooth operation, and optimal engine performance. Manufactured to John Deere’s strict factory specifications, it provides precise fitment and dependable functionality in agricultural, industrial, and construction equipment. Its rugged design is engineered to withstand high-pressure conditions and heavy-duty workloads, ensuring long-lasting durability. For operators and service professionals, this fuel rail delivers OEM-certified quality and trusted reliability to keep John Deere engines performing at their best.

FITMENT CHART

YEARMAKEENGINE(S)
2014John Deere 4TNV86
2015John Deere 4TNV86
2016John Deere 4TNV86
2017John Deere 4TNV86
2018John Deere 4TNV86
2019John Deere 4TNV86
2020John Deere 4TNV86
2021John Deere 4TNV86

PEOPLE ALSO ASKS | BLOG(S)

The high-pressure fuel rail is a critical part of the common-rail injection system. It sits between the high-pressure fuel pump and the injectors, acting as a reservoir and distributor of fuel under high pressure. Below are the typical internal and interface components of that rail.

Key Components

  • Fuel Rail Body / Manifold
    • The central metal block or tube that holds fuel under pressure and routes it to each injector.
  • Fuel Inlet / Supply Port
    • The connection point through which pressurized fuel is fed into the rail from the fuel pump.
  • Injector Outlets / Ports
    • Individual passages leading from the rail body to each injector, delivering precise high-pressure fuel.
  • Pressure Relief / Bypass Valve
    • A valve built into or mounted on the rail to release excess pressure or protect the system from overpressure.
  • Pressure Sensor / Transducer
    • A sensor mounted on the rail to measure and report the fuel pressure to the engine control module (ECM).
  • Seals, Gaskets & O-Rings
    • Elastomeric seals around ports and interfaces to prevent fuel leakage under high pressure.
  • Mounting Flanges / Brackets
    • Structural features that secure the rail assembly to the engine block or subframe.
  • Internal Passages / Pass-Throughs
    • Machined channels within the rail body that guide fuel from the inlet to each injector port.

These components work together to maintain a stable, high-pressure fuel supply to the injectors, provide pressure feedback, and protect the system from overpressure or leakage.

The high-pressure fuel rail is a vital part of modern fuel injection systems. It distributes pressurized fuel from the pump to the injectors, ensuring precise fuel delivery for efficient combustion. Because it operates under extreme pressure and temperature, its lifespan depends on the quality of fuel, maintenance practices, and operating conditions.

Average Lifespan of a High-Pressure Fuel Rail

A well-maintained high-pressure fuel rail typically lasts 100,000 to 150,000 miles — and often much longer in vehicles that use clean fuel and undergo regular maintenance. However, harsh environments, poor fuel quality, or system contamination can shorten its life significantly.

Factors That Affect Longevity:

  • Fuel Quality
    • Dirty or contaminated fuel introduces debris and moisture that cause corrosion or clogging.
  • Fuel Filter Maintenance
    • Neglecting filter changes allows contaminants to reach the rail and injectors.
  • Operating Pressure
    • Excessive fuel pressure from a faulty pump or regulator stresses the rail.
  • Corrosion and Moisture
    • Exposure to water or condensation promotes internal rust.
  • Driving Conditions
    • Heavy-duty operation or long idling periods accelerate wear.

How to Extend Fuel Rail Lifespan

To maximize the life of your high-pressure fuel rail:

  • Always use high-quality fuel and trusted stations.
  • Replace fuel filters according to manufacturer guidelines.
  • Keep the fuel system sealed to prevent air and moisture intrusion.
  • Address fuel leaks or pressure irregularities immediately.

The typical lifespan of a high-pressure fuel rail is around 100,000 to 150,000 miles, depending on maintenance and fuel quality. With proper care and preventive maintenance, your fuel system can perform reliably for many years — ensuring consistent power and efficiency.

Yes, contamination or debris can restrict flow and cause injector misfires or fault codes.

Use only clean diesel fuel and replace filters regularly to prevent contamination.

Yes, a faulty or leaking fuel rail can cause irregular fuel delivery and reduce efficiency.

It’s best to have it installed by a qualified technician to ensure correct torque and cleanliness.

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