BMW 5 7 Series E38 E39 Air Conditioning Evaporator Temperature Sensor 8391387

The BMW 5 7 Series E38 E39 Air Conditioning Evaporator Temperature Sensor is an original air conditioning evaporator temperature sensor designed for the air conditioning systems in BMW 5 Series E39 and 7 Series E38 models. This component is responsible for precise temperature measurement in the evaporator area, allowing the air conditioning control unit to maintain set operating parameters stably. By using a factory BMW solution, you ensure compatibility with the vehicle's installation and predictable performance of the air conditioning system.

Specifications and technical data

• SKU: 8391387
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 8391387
• Substitutable numbers: 64118391387, 8391387, EM
• Category: Other Air Conditioning & Heating

Function and Role of the Evaporator Temperature Sensor

The evaporator temperature sensor in BMW E38/E39 air conditioning monitors the thermal conditions within the evaporator housing and sends a signal to the control module. Based on this, the system regulates the operation of the compressor and expansion valve, reducing the risk of evaporator icing and ensuring stable cooling performance. A properly functioning sensor helps maintain comfortable cabin temperature while supporting optimal energy consumption of the air conditioning system.

Compatibility with BMW Air Conditioning System

The BMW 5 7 Series E38 E39 Air Conditioning Evaporator Temperature Sensor is designed to work with the factory air conditioning control in these BMW generations. This means matched electrical characteristics, appropriate measurement range, and correct mounting geometry within the evaporator housing. Using an original BMW solution minimizes the risk of control unit errors, incorrect temperature readings, or unforeseen reactions of the air conditioning system.

Benefits of Using an Original BMW Part

Choosing an evaporator temperature sensor from the BMW OE parts group primarily offers:

• maintenance of the factory air conditioning control logic without the need for installation modifications,
• consistency with other system components such as the evaporator, compressor, or control module,
• predictable system behavior under various operating conditions,
• easier diagnostics in case of potential faults, due to the use of components compliant with BMW service documentation.

A part from this group is particularly useful for professional air conditioning system repairs when you want to maintain original operating characteristics and avoid compatibility issues with aftermarket replacements.

Product Condition and Service Application

The offered sensor is in used condition, allowing for economical repair of the air conditioning system while maintaining the original BMW specification. This type of component is suitable for both replacing a damaged sensor and during comprehensive air conditioning service when verification and potential replacement of temperature measurement components are necessary. A used OEM part is a sensible choice when the cost-to-functionality ratio is important and maintaining the factory manufacturing standard is desired.

System Expansion and Related Components

If you are planning a comprehensive repair or upgrade of the air conditioning zone in your BMW and need other parts from the same group, such as temperature sensors, air conditioning hoses, or control elements, check the available parts in the Other BMW category.

To compare the characteristics of advanced powertrain and braking systems in higher-class cars, you can read an article discussing the structural differences between sports and standard versions, available here: Audi RS vs. Other Models – What Lies Under the Hood and Chassis?.