Fiat Doblo Stilo Fuel Injector Diesel 1.9 JTD Injection Unit 55187290

Fiat Doblo Stilo Fuel Injector Diesel 1.9 JTD is an original injector nozzle from the Fiat group, designed for 1.9 JTD diesel engines. This component allows for precise dosing of diesel fuel, which translates to stable engine operation and proper functioning of the injection system.

Specifications and technical data

• SKU: 55187290
• Mark: Fiat
• Condition: Used
• OEM Part Number: 55187290
• Substitutable numbers: 55187290
• Fuel type: Diesel
• Category: Fuel Injectors

Purpose and Role of the Injector in the 1.9 JTD Engine

The injector nozzle in a diesel engine is responsible for atomizing fuel under high pressure directly into the combustion chamber. In 1.9 JTD units, the use of the correct injector is crucial for:

• maintaining smooth engine operation across the entire RPM range,
• stable cold starts and starts with a warm engine,
• reducing exhaust smoke and improving mixture composition,
• efficient diesel fuel utilization while maintaining factory engine parameters.

Selecting the correct injector nozzle for a Fiat Doblo or Stilo with a 1.9 JTD engine is important for both the durability of the engine and the economy of operation.

Benefits of Using an Original Fiat Injector Nozzle

The offered Diesel Fuel Injector for 1.9 JTD comes from the Fiat parts line, meaning it maintains the factory operating characteristics of the injection system. In practice, this translates to:

• correct fuel pressure and spray pattern in line with the engine manufacturer's specifications,
• compatibility with the factory engine control unit and injection maps,
• proper mechanical fit to the cylinder head seat and fuel lines,
• reduced risk of diagnostic errors related to incorrect injector operation.

For diesel engines, the use of the correct injector directly impacts the smoothness of operation, noise levels, and throttle response.

Technical and Fuel Characteristics

The presented component belongs to the Injector Nozzles category and is designed for diesel-powered systems. The injector's construction is adapted to the operating parameters of diesel engines, where:

• fuel is supplied under high pressure in multiple injection phases,
• precision dosing is important in short intervals,
• proper fuel atomization is crucial for complete and even combustion.

A correctly selected injector nozzle helps reduce fuel consumption and supports stable idle speed, which is important both in city driving and on longer journeys.

Component Condition and Service Application

The injector is offered as a used part, which is an attractive service solution for users seeking a compromise between repair cost and maintaining original manufacturer specifications. This type of component can be used for, among other things:

• repairing individual cylinders when one injector has been damaged,
• comparative diagnostics (test swap of injectors),
• restoring engine functionality in intensively used vehicles, e.g., in commercial applications.

Before installation, the standard workshop procedure is recommended, including verification of the injector's operating parameters on a diagnostic bench and checking the fuel system for leaks.

Diagnostics and Prevention of the Injection System

To better understand the symptoms of wear or damage to injectors in diesel engines, it is worth reading the guide: Diesel Injector Faults – How to Recognize Them and What Their Neglect Entails. The article discusses typical symptoms, possible consequences of neglect, and basic diagnostic methods, making it easier to decide on replacing the component.

Selecting Fiat Injector Nozzles and Additional Information

If you are looking for other Fiat injector nozzles for your vehicle, check the available assortment in the category: Fiat injector nozzles. This will allow you to easily compare different injector variants in terms of their application in a specific model and engine version.

If you are considering purchasing used parts instead of new ones, the guide: New or Used? Comparing the Costs and Quality of Car Parts may also be helpful. It discusses the differences between new and used components, along with practical examples of their use in vehicle repairs.