The VW Volkswagen Polo MK5 1.2 TDI Diesel Injector Nozzle is a factory-spec injector nozzle designed for the 1.2 TDI diesel engine in the fifth-generation Polo. This component ensures precise diesel fuel metering, contributing to stable engine operation and proper combustion quality.
Specifications and technical data
- SKU: 03P130277
- Mark: Volkswagen
- Condition: Used
- OEM Part Number: 03P130277
- Substitutable numbers: 03P130277
- Fuel type: Diesel
- Category: Fuel Injectors
Intended Use and Function in the Injection System
The injector nozzle in the 1.2 TDI engine is responsible for accurate fuel atomization within the combustion chamber, maintaining the correct injection pressure and timing. A properly functioning injector supports:
- smooth engine operation at idle and under load,
- efficient engine starting in both low and high temperatures,
- maintaining optimal fuel consumption in daily use,
- reducing smoke and excessive exhaust emissions.
For diesel engines, the quality of injector nozzle performance directly impacts the powertrain's dynamics, flexibility, and overall reliability.
Benefits of Using an Original Injector Nozzle
Using an original injector nozzle in the Polo MK5 1.2 TDI allows you to maintain the performance parameters specified by the vehicle manufacturer. Key advantages include:
- factory fit for the cylinder head and fuel system – no modifications or adaptations required,
- preservation of correct injection characteristics (timing, quantity, spray pattern),
- stable operation at low and high RPMs, without jerking or misfires,
- reduced risk of overloading other system components, such as the high-pressure fuel pump or diesel particulate filter.
For the user, this translates to more predictable vehicle behavior, better throttle response, and fewer costly repairs resulting from incorrect fuel delivery.
Component Condition and Installation Recommendations
The offered injector nozzle is a used part, allowing for an economical restoration of the injection system's functionality in the VW Polo MK5 1.2 TDI. Before installation, it is recommended to:
- check the fuel system for leaks and the condition of the lines,
- verify injection parameters on a diagnostic bench after installation,
- use new sealing washers in accordance with the vehicle manufacturer's recommendations.
Professional installation and subsequent adaptation in the engine control unit (if required by the system) help to fully utilize the potential of the installed injector nozzle.
Injection System Diagnostics and Prevention
Malfunctioning injector nozzles in diesel engines can cause a range of symptoms – from power loss and increased fuel consumption to starting problems. It is worth familiarizing yourself with material describing typical symptoms and verification methods, available in the article Diesel Injector Faults – How to Recognize Them and What Neglecting Them Entails. Informed diagnostics allow for quicker decisions regarding component replacement or repair.
Volkswagen Injector Nozzles – Selection and Alternatives
If you are looking for other Volkswagen injector nozzles for different models of this brand or are considering alternative solutions for your Polo, check the full offer in the category Volkswagen Injector Nozzles. This will allow you to select a component tailored to the specific engine version and vehicle year.
When choosing between new and used parts, the guide Car Parts – New or Used? Comparing Costs, Quality, and Durability may also be helpful. It discusses the differences in costs, durability, and availability of components, including those of the injection system.
