Location of the BMW 3 Series Outside Temperature Sensor?
2 Answers
The location of the BMW 3 Series outside temperature sensor is at the front left side of the vehicle body. Below is relevant information about temperature sensors: 1. Contact Temperature Sensors: Contact temperature sensors have their detection part in good contact with the measured object, also known as thermometers. Thermometers achieve thermal equilibrium through conduction or convection, allowing the thermometer's reading to directly indicate the temperature of the measured object. Generally, they offer high measurement accuracy. Within a certain temperature measurement range, thermometers can also measure the internal temperature distribution of objects. 2. Non-Contact Temperature Sensors: Their sensitive elements do not come into contact with the measured object, also known as non-contact temperature measurement instruments. These instruments can be used to measure the surface temperature of moving objects, small targets, objects with small heat capacity, or objects with rapidly changing (transient) temperatures, as well as the temperature distribution of temperature fields. The advantage of non-contact temperature measurement is that the upper measurement limit is not restricted by the temperature resistance of the sensing element, so in principle, there is no limit to the highest measurable temperature. For temperatures above 1800°C, non-contact temperature measurement methods are primarily used. With the development of infrared technology, radiation temperature measurement has gradually expanded from visible light to infrared, covering temperatures below 700°C down to room temperature, with high resolution.
I've been driving a BMW 3 Series for years. The ambient temperature sensor is mounted on the inner side of the front bumper, near the license plate or the lower edge of the front grille. It's intentionally positioned away from the engine to avoid heat interference with temperature readings, ensuring accurate dashboard display. If the sensor malfunctions, such as providing incorrect temperature readings, the air conditioning system may act up, making it difficult to get cold air in summer. When I inspect it myself, I have to crouch down and use a flashlight to look under the bumper, where there's a small probe protected by a plastic cover. Removing the cover is simple, but avoid pulling it forcefully to prevent damage. The exposed location makes it susceptible to road debris or water splashes, so I always clean this area during car washes. I advise new owners not to overlook this small component—regular checks can prevent malfunctions and ensure driving safety. If you notice inaccurate temperature readings, get it repaired immediately; don't wait until the air conditioning fails.
