Where is the sensor located on the BMW 4 Series?
2 Answers
The sensor on the BMW 4 Series is installed at the position where the circulating water returns to the radiator in the engine. Function of the coolant temperature sensor: The function of the coolant temperature sensor is to convert the coolant temperature into an electrical signal and input it to the ECU. It adjusts the fuel injection quantity by increasing it during low temperatures, modifies the ignition timing advance angle by increasing it during low temperatures and delaying it during high temperatures to prevent knocking, and affects the idle control valve. During low temperatures, the ECU controls the idle control valve based on the coolant temperature sensor signal to increase the idle speed. Structure of the coolant temperature sensor: The coolant level and temperature sensor consists of a temperature control section and a water level control section. It is also equipped with a pressure reduction device before the electric valve and a rotary muffler heater for heating.
I've been driving a BMW 4 Series and often tinker with the car myself. The sensor locations are quite scattered. For example, the parking sensors are on the front and rear bumpers, marked by those small round dots—they beep when driving or reversing. Then there's the ABS sensor, installed near the wheels, close to the braking system; if the car skids uncontrollably, it might be dirty or damaged. Under the hood, there are quite a few sensors too—the mass airflow sensor is at the air intake, and the engine temperature sensor is above the engine. Inside the car, some sensors are in the central control area, and the driver-assistance cameras might be near the windows. Location matters because if a sensor gets dirty or displaced, the dashboard will alert you. It's best to clean dust regularly, especially after long drives, as buildup can cause issues and delay your trip.
