BMW Z3 E36 1.8i 316i 318i M43 Petrol High Pressure Rail Fuel Injection 1247904

BMW Z3 E36 316i 318i M43 Fuel Rail from the Injector Nozzles category is an original gasoline fuel system component designed for M43 engines in BMW 3 Series E36 models and the Z3 roadster. This solution is engineered for stable fuel delivery and maintaining the factory operating parameters of the power unit.

Specifications and technical data

• SKU: 1247904
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 1247904
• Substitutable numbers: 13531247904, 1247904, KZ
• Fuel type: Petrol
• Category: Fuel Injectors

Purpose and Role in the Fuel System

The fuel rail in an M43 gasoline engine is responsible for evenly distributing fuel to individual injectors, which translates to stable idle operation, proper throttle response, and predictable fuel consumption. For BMW 316i and 318i E36 units and BMW Z3 models, a properly functioning fuel rail is crucial for maintaining the characteristic smoothness and flexibility of these models.

This component works with the gasoline injection system, maintaining appropriate fuel supply conditions for each cylinder. This allows the engine control unit to precisely meter fuel, which helps in maintaining the correct mixture and reducing the risk of knocking or uneven engine operation.

Benefits of Using an Original BMW Fuel Rail

Using a fuel rail from BMW ensures the preservation of factory geometry and fuel flow parameters. In practice, this means:

• secure fitment to the M43 engine in 316i, 318i, and Z3 models without the need for modifications to mounts or lines,
• compatibility with the factory injection system, which simplifies diagnostics and servicing,
• maintaining predictable performance and engine operating characteristics in line with manufacturer specifications.

This is particularly important for owners of BMW E36 and Z3 youngtimers – maintaining the original fuel system specification helps preserve the vehicle's value and reduces issues with aftermarket part compatibility.

Used Condition and Practical Installation Aspects

The presented fuel rail is a used component, offering a sensible compromise between cost and maintaining the original BMW design. In many cases, installing a functional used part from a dismantled vehicle allows for the restoration of correct engine operating parameters after a failure or wear of the existing component, without the need to invest in expensive replacements.

Before installation, the standard workshop procedure is recommended: checking the fuel system for leaks, verifying the condition of injectors and seals, and checking the correct mounting of lines. This approach increases the chances of trouble-free operation after replacement and reduces the risk of further interventions in the fuel system.

BMW Injector Nozzles – Selection and Diagnostics

When experiencing engine problems – such as jerking, difficulty starting when warm, power loss, or increased fuel consumption – a comprehensive diagnosis of the injection system is recommended. This includes the injectors themselves, as well as the fuel rail, fuel lines, and control components. For M43 gasoline units, the correct selection of a fuel rail for a specific engine version is important for maintaining proper pressure and fuel distribution throughout the system.

If you are interested in a broader context of injection system faults, it is worth familiarizing yourself with material discussing the symptoms and consequences of problems in high-pressure systems – you can find it in the article about diesel injector faults, their symptoms, and the consequences of neglect. Although it concerns diesel engines, many diagnostic and service principles remain similar.

BMW Injector Nozzles – Offer and Youngtimer Project Development

If you are looking for other BMW injector nozzles for your project or daily car, check out our dedicated category BMW Injector Nozzles, where you will find a wide selection of fuel system components for various models of this brand.

Owners of models from the late 90s and early 2000s may also be interested in a broader perspective on the restoration and modernization of older cars. See how used components help restore the functionality and character of classic BMWs in the article about the second life of youngtimers and the role of used parts in refreshing cars from 1998–2012. This is a practical source of knowledge on how to plan car work to combine reasonable costs with preserving the original character of the vehicle.