BMW 1 Series E81 E87 LCI 118d N47 Diesel Sensor Oil Pressure 7801987

BMW 1 Series E81 E87 LCI 118d N47 Diesel Sensor Oil Pressure is an original lubrication system component designed for the N47 diesel engine in the facelifted 1 Series. It ensures precise oil pressure monitoring, which has a direct impact on the safety of the power unit and the correct operation of the engine control unit. This used OEM component is a sensible choice for professional repair or diagnostics of the lubrication system in a BMW 118d.

Specifications and technical data

• SKU: 7801987
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7801987
• Substitutable numbers: 13537801987, 7801987, EM
• Fuel type: Diesel
• Category: Other Engine Parts

Purpose and function of the oil pressure sensor

The presented sensor is a component of the oil pressure control system in the N47 diesel engine used in the facelifted BMW 1 Series E81/E87. Its task is to convert the current oil pressure into an electrical signal that is sent to the engine control unit and the instrument cluster. This enables real-time monitoring of lubrication parameters and quick reaction in the event of a pressure drop, which reduces the risk of serious damage to the power unit.

The original oil sensor works with the factory electrical installation and control unit software, which facilitates installation and minimizes the risk of diagnostic errors. This is particularly important in modern diesel engines, where correct oil pressure values are crucial for the durability of the timing chain, turbocharger, and other lubricated components.

Benefits of using an original BMW sensor

Using an original oil pressure sensor in a BMW 118d N47 brings a number of practical benefits:

• maintaining compliance with factory diesel engine operating parameters,
• stable cooperation with the diagnostic system and the dashboard warning system,
• reducing the risk of false errors and incorrect pressure readings,
• easier diagnostics of potential lubrication system faults.

For workshops and private users, this means a more predictable repair process and the ability to maintain consistency with the factory BMW specification without the need for quality compromises.

Condition, installation, and application in a diesel engine

The offered sensor is a used part, which allows for an economical repair while maintaining the original BMW design. The component is intended for a diesel engine, so its operating characteristics are matched to the higher loads and specifics of N47 units. Installation involves mechanically screwing the sensor into the appropriate oil channel and connecting the factory wiring harness, which in most cases does not require additional modifications.

Before installation, it is recommended to perform a standard check of the socket, seal, and the condition of the electrical installation to ensure a correct signal reading and avoid leaks in the lubrication system. A properly functioning oil pressure sensor is an important element of service prevention in diesel engines, especially in vehicles used intensively or with higher mileage.

Integration with other BMW components and part selection

When working on the lubrication system or performing broader maintenance on the N47 engine, it is worth paying attention to the consistency of the components used. The original oil pressure sensor works well with factory filters, oil lines, and the engine control unit, which makes it easier to maintain stable operating parameters. This allows for more informed service planning and reduces the risk of unforeseen failures resulting from incorrect oil pressure monitoring.

If you are planning a comprehensive repair or upgrade of the engine area in your BMW and need other elements from the same group, such as sensors, lines, or additional modules, check the available parts in the Other BMW category.

Technical support and knowledge about sports drivetrains

For those interested in comparing solutions used in different brands and engine versions, material discussing the construction of high-power units, braking systems, and chassis may be helpful. In this context, it is worth reading the article Audi RS vs other models – what is hidden under the hood and chassis?, which shows how manufacturers design key components in high-performance cars.