BMW 3 5 X3 X5 7 Series E39 E46 E60 E65 E53 E36 Temperature Sensor Switch 1741900

BMW E46 E60 E53 X5 Coolant Temperature Sensor is an original BMW cooling system component designed for precise measurement of the engine coolant temperature. Thanks to its factory operating characteristics, it ensures stable integration with the vehicle's electronics and maintains optimal engine performance parameters.

Specifications and technical data

• SKU: 1741900
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 1741900
• Substitutable numbers: 12521741900, 1741900, 12631286024, 1286024
• Category: Other Interior Parts & Accessories

Purpose and Function of the BMW Coolant Temperature Sensor

The coolant temperature sensor in BMW 3 Series E46, 5 Series E60, and BMW X5 E53 models is responsible for transmitting information about the current coolant temperature to the engine control unit. Based on this data, the control system adjusts fuel injection, ignition timing, fan operation strategy, and other parameters that affect engine smoothness and thermal safety. A functional sensor reduces the risk of overheating, rough cold starts, and increased fuel consumption.

Why Choose an Original BMW Sensor from the "Other Parts" Category

The offered component comes from the Other Parts group, but it is a part specifically designed to work with the factory BMW installation. This means:

• correct resistance characteristics across the entire operating temperature range,
• proper fit for the cooling system housing,
• accurate compatibility with the stock engine control unit and dashboard indicators.

This ensures installation without the need for wiring modifications, and engine operating parameters remain consistent with the manufacturer's specifications. This is particularly important in modern engines, where even minor deviations in the sensor signal can lead to control unit errors or incorrect temperature readings.

Used Condition – Practical Benefits for the User

The presented sensor is in used condition, which helps reduce repair costs while maintaining the original BMW part specifications. For many users, this is a sensible compromise between price and quality, especially for older vehicle generations like the E46, E60, or X5 E53. By choosing a salvaged part, you get the factory design and fit, avoiding problems typical of cheap aftermarket replacements with uncertain parameters.

Typical Symptoms of a Faulty Coolant Temperature Sensor

Replacement of the BMW coolant temperature sensor is recommended when symptoms such as the following appear:

• incorrect temperature readings on the gauges or erratic fluctuations,
• increased fuel consumption and cold start issues,
• engine control unit error codes related to coolant temperature,
• improper radiator fan operation (premature or delayed activation).

In such cases, installing a functional, original sensor helps restore the cooling system's correct operation and stable engine performance.

Selection and Integration with BMW's Electronic System

The BMW coolant temperature sensor works directly with the factory engine control unit and the vehicle's electrical system. When selecting a part, it is crucial to ensure compatibility with the specific model generation (E46, E60, E53 X5) and the wiring harness. In practice, this means:

• no need for modifications to connectors or wires,
• preservation of original engine control maps,
• correct operation of temperature indicators and engine protection functions.

This makes sensor replacement a service task that can be performed quickly and without interfering with the vehicle's software.

Other Products and Technical Knowledge

If you are looking for other items from the BMW Other Parts category, check out our offer, where you will find a wide selection of components such as BMW Other Parts. This is a convenient way to select additional parts for your BMW car in one place.

To compare the characteristics of sports powertrains with solutions used in standard versions, it is worth reading the article describing the differences in engine, brake, and chassis construction – you can find it here: Audi RS vs. Other Models – What Lies Under the Hood and Chassis?.

If you are interested in a broader context of using salvaged parts in modern BMW 3 and 5 Series, including in the area of electronics and onboard systems, the following guide may also be helpful: Years of Driving Pleasure – How to Care for iDrive Systems and Electronic Modules in BMW 3 and 5 Series Models.

Summary

The BMW E46 E60 E53 X5 Coolant Temperature Sensor is a practical solution for users who want to restore the proper functioning of the cooling and engine control system, using original BMW construction at a reasonable price. A properly selected and functional sensor supports stable engine operation, improves driving comfort, and reduces the risk of costly failures due to engine overheating.