BMW E90 E92 E93 LCI M3 Fuel Rail Petrol Idle 7838260

The BMW E90 E92 E93 LCI M3 Idle Fuel Rail is an original gasoline fuel system component designed for the facelifted BMW 3 Series E90, E92, and E93 models in the M3 version. The precise design of the rail ensures stable fuel supply at idle, which translates to smooth engine operation and predictable engine response.

Specifications and technical data

• SKU: 7838260
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7838260
• Substitutable numbers: 13417838260, 7838260
• Fuel type: Petrol
• Category: Fuel Injectors

Purpose and Role in the Fuel System

The idle fuel rail in the M3 is responsible for uniform fuel distribution to the injectors under low engine load conditions. In high-performance gasoline engines like the M3, stable pressure and proper fuel distribution are crucial for:

• maintaining stable idle RPMs, without fluctuations or jerks,
• precise injector operation within the low fuel dosage range,
• reducing fuel consumption in city driving and during calm rides,
• minimizing the risk of misfires and improper engine operation when hot or cold.

Replacing a worn or leaking rail with a functional OEM part allows for the restoration of factory gasoline fuel system operating parameters.

Design and Fitment for BMW M3 E90/E92/E93 LCI

The BMW E90 E92 E93 LCI M3 Idle Fuel Rail has been specifically designed for the M3 engine bay geometry and the characteristics of its gasoline injection system. This means:

• factory mounting points – no need for modifications or adaptations,
• compatibility with original injectors used in this engine,
• proper routing of fuel lines, which reduces the risk of vibrations and micro-leaks,
• maintaining stock engine operating characteristics across the entire temperature range.

This makes the component suitable for both standard operation and after software modifications, as long as the stock gasoline injection system is retained.

Condition of the Part and Benefits of Using a Used OEM Part

The offered rail belongs to the category of injector nozzles, which are components that directly interact with fuel injection. As a used OEM part, it provides:

• original manufacturing quality in line with BMW standards,
• reliable fitment to the fuel system without the risk of installation issues,
• preservation of factory fuel flow geometry, which is important for precise dose control.

In many cases, using a tested, used OEM rail is a more advantageous solution than installing aftermarket parts with uncertain flow characteristics and material quality.

Diagnosing Fuel System Issues

Improper operation of the fuel rail or injectors can manifest as, among other things, fluctuating idle, jerking on a cold engine, or increased fuel consumption. Although the presented component relates to the gasoline system, many principles of injector diagnostics are similar to diesel solutions. For a better understanding of typical symptoms and the consequences of neglecting the fuel system, it is worth familiarizing yourself with the material: diesel injector faults – symptoms, consequences, and diagnostics. This will help you better assess when replacing fuel system components is justified.

Assistance with Selection and Additional Materials

If you are also looking for other components from the BMW injector nozzles category for your car, check out our offer: BMW injector nozzles. There you will find a wide selection of components that work with the injection system, making comprehensive engine servicing easier.

For owners of the 3 Series who want to better understand the specifics of their engines, we also recommend a practical guide: common BMW E90 engine problems – most frequent issues and repair costs. This is a helpful source of knowledge when planning maintenance and potential gasoline fuel system upgrades.