Temperature sensors

Temperature sensors are essential components in modern vehicles, monitoring the temperature of key systems such as the cooling system, air conditioning, engine, and exhaust system. Their precise readings allow control systems to optimize vehicle performance, improving efficiency, safety, and comfort. At Global Parts, you'll find a wide selection of used car parts, including temperature sensors, perfectly suited to brands like BMW, Audi , Mercedes, Volkswagen, Mini, and more . The engine temperature sensor is a measuring element that typically operates in a range of approximately -40°C to as much as 140°C, transmitting data directly to the engine control unit (ECU). Based on this information, the on-board computer regulates, among other things, fuel delivery, ignition timing, and radiator fan operation. In models such as the BMW E90, the engine temperature sensor is also responsible for ensuring the engine transitions properly from the starting phase to its optimal operating temperature, typically between 90–105°C .

What functions do temperature sensors perform?

Temperature sensors play a key role in various vehicle systems:

• Coolant Temperature Monitoring – Informs the control system of the engine temperature, preventing overheating.
• Climate Controls – Senses indoor and outdoor temperatures to regulate air conditioning operation.
• Exhaust gas temperature control – Protects the exhaust system and particulate filter from damage.
• Cooperation with safety systems – Enables optimal operation of ABS, ESP and other control systems. In practice, temperature sensors interact with other components, such as the thermostat, radiator fan, and injection system . Precise temperature measurement helps maintain stable engine operating parameters both in city traffic and on the highway. In modern BMW and Audi engines, a single sensor can simultaneously control the dashboard gauge and ECU control algorithms.

Why is it worth taking care of temperature sensors ?

Malfunctioning temperature sensors can lead to serious problems with vehicle systems and reduce performance. Typical symptoms include:

• Dashboard Errors – Check engine or cooling system lights may indicate sensor problems.
• Air conditioning malfunction – The system does not respond appropriately to temperature changes.
• Engine Overheating or Underheating – A faulty sensor can affect fan operation or fuel delivery.
• Increased fuel consumption – Incorrect temperature readings can interfere with the injection system. If you need a replacement, you'll find the right used car parts at Global Parts that will restore full functionality to your vehicle.

How to choose the right temperature sensors ?

When selecting temperature sensors, there are several key aspects to consider:

• Vehicle-specific fit – Each system has its own specific technical requirements. At Global Parts, you'll find temperature sensors perfectly matched to BMW, Audi, Mercedes, Volkswagen, Mini , and more .
• Technical condition – The sensors used should be fully functional, free from mechanical and electrical damage.
• Sensor Type – Make sure the selected sensor is compatible with the system in which it will operate (e.g. coolant sensor, air conditioning sensor). For example, the BMW E90 engine temperature sensor comes in several variants depending on the engine type (petrol or diesel) and engine generation. Proper sensor matching ensures proper operation with the thermostat and stable operating temperatures, which directly impacts engine performance and fuel consumption.

Table - types of temperature sensors

Sensor type	Place of installation	Function
Engine temperature sensor	Engine head or block	Control of the operating temperature of the drive unit
Coolant sensor	Cooling system	Fan control and data transfer to the ECU
Exhaust gas temperature sensor	Exhaust system	Protection of the DPF filter and catalytic converter against overheating
Outside temperature sensor	Bumper or mirror housing	Adjusting the operation of air conditioning and comfort systems

Why choose used temperature sensors ?

Used car parts, such as temperature sensors used, is an economical solution that allows you to save money while maintaining high quality. By choosing used control system components, you gain:

• Lower costs – Used sensors are much cheaper than new ones, but offer equally high quality.
• Ecology – Recycling parts supports environmental protection and reduces waste.
• A wide range – In our store you will find used temperature sensors for the most popular car brands.

How to take care of temperature sensors ?

To ensure that temperature sensors function reliably for a long time, it is worth following a few rules:

• Regular inspection – Check the condition of sensors during technical inspections of vehicle systems.
• Avoid engine overheating – Keep your cooling system working properly to prevent damage to your sensors.
• Cleaning Electrical Connectors – Ensure proper signal conduction by removing corrosion and dirt.
• Replace on time – Damaged or worn sensors should be replaced to avoid problems with the control systems. When you need a replacement, Global Parts has the right used car parts to ensure the durability and efficiency of your vehicle.

FAQ - Frequently asked questions about temperature sensors in cars

Question	Answer
What is an engine temperature sensor?	This is a measuring element that monitors the engine operating temperature and transmits data to the ECU.
How does the engine temperature sensor work?	It works by changing resistance with temperature, which allows the ECU to accurately determine the engine's operating conditions.
What is the correct operating temperature for an engine?	In most vehicles it is in the range of 90 to 105°C, depending on the design of the drive unit.
Does the temperature sensor affect fuel consumption?	Yes, because based on its signal the controller regulates the fuel dose and the ignition timing.
What makes the BMW E90 engine temperature sensor unique?	The BMW E90 uses different sensor variants depending on the engine version, which affects compatibility and installation.
Can one sensor support multiple systems?	Yes, in modern cars one sensor can simultaneously power the temperature gauge and the engine control unit.

Summary: Temperature Sensors at Global Parts Automotive Store

Temperature sensors are essential components that support the optimal operation of the engine, cooling system, air conditioning, and other systems. By maintaining their technical condition, you can improve your vehicle's performance and avoid costly repairs. The Global Parts automotive store invites you to browse our wide selection of genuine used car parts . Whether you're looking for car parts for BMW , Audi , Volkswagen , Mercedes, Mini , or others, you'll find them at competitive prices. We strive to ensure every customer finds the right parts for their car, and if you have any questions or concerns about selecting the right components, we're happy to help! Please contact us – we're here to help! For more information and interesting facts, visit our automotive blog .