BMW 1 3 5 7 Series E60 E61 E65 E70 E71 E83 E87 E90 Level Switch Coolant

BMW 1 3 5 7 Series E60 E61 E65 E70 E71 E83 E87 E90 Level Switch Coolant is an original cooling system component designed for 1 and 3 series models, ensuring precise control of engine operating parameters. Thanks to its factory-fit design for BMW installations, the sensor integrates with the vehicle's electronics without the need for modifications, which facilitates servicing and reduces the risk of installation errors. This is a practical solution for users who want to maintain consistency with factory specifications and stable cooling system operation.

Specifications and technical data

• SKU: 7553919
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7553919
• Substitutable numbers: 17137553919, 7553919, 17117526845, 7526845, 17110152373, 0152373, 17137800097, 7800097, 17137524812, 7524812, 17137532124, 7532124, 17117546548, 7546548, 17130409622, 0409622
• Category: Other Engine Cooling Components

Purpose and function in the cooling system

The coolant level switch in BMW E81, E87, E90 and E91 models is responsible for monitoring cooling system parameters and transmitting information to the engine control unit and instrument cluster. A properly functioning component allows for:

• maintaining a stable operating temperature of the power unit,
• early detection of irregularities in the fluid circulation,
• proper operation of warning functions on the dashboard.

Correct parameter reading from the sensor is crucial for protecting the engine from overheating and for maintaining the correct control strategy for fans and other cooling system components.

Compatibility and fit for BMW

The offered sensor has been designed specifically for the BMW E81, E87, E90 and E91 platforms, which translates into appropriate connectors, mounting geometry, and operating characteristics consistent with the manufacturer's requirements. As a result:

• it fits factory sockets in the cooling system without additional adapters,
• it works with the original BMW engine control unit,
• it reduces the risk of diagnostic errors associated with incorrect signals.

Such a fit is particularly important in modern units, where the engine control unit uses data from the sensor for dynamic temperature and load management.

Characteristics of the used component

The presented sensor comes from disassembly and is offered as a used part, which allows for reducing repair costs while maintaining the original BMW specification. This type of solution is often chosen when servicing older generations of the 1 and 3 series, where both technical compliance and operating economy are important. A used OEM component usually fits better into the existing system than random replacements with uncertain parameters.

Benefits of using an original BMW sensor

Using an original coolant level switch in BMW E81, E87, E90 and E91 models brings a number of practical benefits:

• Stable cooling system operation – correct input data for the engine control unit reduces the risk of overheating or underheating the unit.
• Consistency with the factory installation – no need to modify the electrical harness or radiator housing.
• Easier diagnostics – the sensor's operating parameters are consistent with the values expected by the BMW diagnostic system, which facilitates reading interpretation.
• Reduction of compatibility issues typical of random replacements.

Support for cooling system expansion and service

If you are planning a comprehensive repair or upgrade of the cooling system area in your BMW and need other components from the same group, such as additional sensors, hoses, or mounting elements, check out the available parts in the Other BMW category.

When planning broader service work or modifications, it is also worth checking out comparative materials regarding technical solutions in sports versions of German models – you will find them in the article Audi RS vs other models – what is hidden under the hood and chassis?, which discusses differences in engine, brake, and chassis construction using the RS series as an example.