8638758

BMW G20 G30 520D B47D20B. Oil Level Sensor 8638758 is an original part from the Oil Pans group, designed for precise monitoring of oil quantity in BMW diesel engines. Thanks to its factory design, it ensures a reliable oil level reading, supporting safe operation of the powertrain and reducing the risk of running with too low lubrication levels.

Specifications and technical data

• SKU: 8638758
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 8638758
• Substitutable numbers: 8638758, 12618638758
• Category: Oil Sumps

Purpose and Function of the Oil Level Sensor

The oil level sensor in the B47D20B engine is responsible for continuously measuring the amount of lubricant in the oil pan and transmitting information to the engine control unit and the dashboard information system. A properly functioning component allows you to:

• maintain a safe oil level in the powertrain,
• detect oil level drops early,
• minimize the risk of engine seizure or accelerated wear,
• ensure stable operation of the lubrication system in daily use.

For users of BMW 5 and 3 Series with the B47D20B engine, replacing a faulty sensor with an original part from the same construction group is crucial for maintaining safe engine operating parameters.

Compatibility with BMW G20 and G30 520D

The presented sensor has been specifically designed for the B47D20B unit used in BMW G20 and G30 models in the 520D version. This means that the geometry, mounting method, and electrical connector are adapted to the manufacturer's factory solutions, which facilitates installation and reduces the need for additional modifications.

Thanks to this, the part can be used both for standard replacement of a worn sensor and for repairs related to the lubrication system, e.g., after intervention in the oil pan or after service work on the lower part of the engine.

Product Characteristics and Application Benefits

The offered BMW oil level sensor belongs to the group of OEM parts, which translates into maintaining compliance with the factory operating parameters of the powertrain. In practice, this means:

• correct cooperation with engine control electronics,
• appropriate sensitivity of oil level measurement,
• stable operation under typical operating conditions,
• no need for software adaptation for an aftermarket part.

As a part from the Oil Pans category, the sensor is mounted in the lower part of the engine, in direct contact with the oil. Therefore, when replacing it, it is worth paying attention to the tightness of the connection and the correct routing of the cable to ensure uninterrupted oil level reading and protection against mechanical damage.

Product Condition and Service Application

The product is offered as a used part, allowing for economical repair of the lubrication system while maintaining the original BMW specification. This type of solution is particularly beneficial in cases of:

• post-accident repairs in the lower engine area,
• mechanical damage to the oil pan and accessories,
• diagnostics of errors related to incorrect oil level readings.

Choosing an original oil level sensor from the same construction group helps maintain the consistency of powertrain operating parameters and reduces the risk of communication problems within the engine's electrical system.

Lubrication System Expansion and Related Parts

If you are planning a comprehensive repair or upgrade of the engine area in your BMW and need other parts from the same group, such as the oil pan body, seals, or additional mounting elements, check the available parts in the BMW Oil Pans category.

For those interested in a broader approach to modifying and servicing cars of this brand, including the use of used components to improve performance and car characteristics, an article describing the possibilities of upgrading MINI models may be helpful – you can find it here: MINI John Cooper Works – what sets it apart and how to improve your MINI?.