BMW E60 E61 M5 E63 E64 M6 S85 Petrol Fuel Injector Valve 7834893

BMW E60 M5 E63 M6 S85 Fuel Injector 7839098 is an original gasoline injector nozzle designed for the high-revving S85 engine in BMW M series models. This component ensures precise fuel delivery, stable engine operation, and maintains the characteristic dynamics of BMW's sporty versions.

Specifications and technical data

• SKU: 7839098
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7839098
• Substitutable numbers: 13647839098, 7839098, 13647834893, 7834893
• Fuel type: Petrol
• Category: Fuel Injectors

Purpose and Technical Characteristics

The presented fuel injector for BMW E60 M5 and E63 M6 with S85 engine belongs to the Injector Nozzles category and has been specifically designed for the demands of the naturally aspirated V10 unit. Its gasoline-compatible design allows for precise fuel spray formation, which translates to proper combustion across the entire RPM range – from idle to track conditions.

Original BMW OE origin means factory flow parameters are maintained, along with appropriate operating pressure and compatibility with the stock engine control system. This allows the injector to work with ECU maps without requiring additional software modifications.

Benefits of Using an Original Injector Nozzle

Using an original injector in the S85 engine brings a number of tangible operational benefits:

• Stable Engine Operation – uniform gasoline delivery to each cylinder minimizes misfires and rough idling.
• Optimal Dynamics – proper fuel atomization supports achieving full power and torque across the entire RPM range.
• Improved Driving Refinement – correct fuel-air mixture formation reduces vibrations and improves throttle response.
• Support for Emission Control System – accurate fuel metering helps maintain the efficiency of catalytic converters and lambda sensors.
• Consistency with Factory Calibration – no need for engine control unit adaptation after replacing with an OEM specification part.

Condition, Verification, and Service Application

The injector is a used component, which translates to an attractive compromise between repair cost and maintaining original BMW OE quality. This type of part is ideal for:

• Diagnosing gasoline operation issues – as a test replacement part when searching for the cause of rough engine running, jerking, or increased fuel consumption,
• Individual repairs – when a single injector is damaged and there's no need to replace the entire set,
• S85 engine rebuilds – during major overhauls or cylinder head replacements, where restoring proper gasoline supply is required.

Before installation, standard service procedures are recommended: leak testing, spray pattern verification, and cleaning of the pre-filter, in accordance with workshop practices for gasoline injector nozzles.

Importance of Proper Gasoline Injection in the S85 Engine

The S85 engine in the BMW M5 E60 and M6 E63 operates at high RPMs and requires precise fuel delivery control. Faulty or worn injector nozzles can lead to:

• Uneven engine operation – especially when cold or under partial load,
• Power loss – resulting from incorrect mixture composition,
• Increased fuel consumption – due to corrections made by the engine control unit,
• Accelerated engine component wear – with excessively lean or rich mixtures.

Therefore, at the first signs of gasoline supply problems, it is advisable to include injector nozzle inspection in the diagnostic plan. For comparison with typical symptoms of high-pressure system failures, you can refer to the guide on diesel injector faults, their symptoms, and the consequences of neglect, which helps understand the importance of functional injection in all engine types.

Other BMW Injector Nozzles

If you are looking for other BMW injector nozzles for different models or engine variants, check out our dedicated category: BMW Injector Nozzles. There you will find a wide selection of original parts that will help maintain the fuel supply system at the proper technical level.