Used BMW X3 Door Sensor Switch

All used BMW X3 Door Sensor Switch listed on Breakeryard.com are tested, original (OEM) manufacturer parts and come with a 14 day money back guarantee. Breakeryard.com listed used car parts for BMW X3 are from premium breaker yards from across the UK, saving you up to 80% compared to main dealer prices.

About Door Sensor Switch

The X3 BMW door sensor switch is a simple yet clever sensor which detects when the door is opened or closed.

The door sensor switch is usually linked to the car’s alarm and security system, so if the sensor switch detects unauthorised entry, by the car door being opened without the use of a key, the car alarm is activated. 

This type of sensor usually works with a magnetically operated switch called a reed switch. The door sensor switch is hidden in the door frame and a magnet is placed on the other side of the door and this is all connected to an electrical circuit. When the car door is opened this moves the switch and the magnet apart, which makes the electrical connectors come together which sets the alarm off. The door sensor switch also activates the internal light/s in the car when the door is opened and the light/s are switched off when the door is shut again. 

Faulty door sensor switches can mean the sensor will not detect an intrusion which jeopardises the safety of the vehicle. It can also lead to problems with the car’s central locking system and can cause the internal lights to either not come on when the door is opened or to stay on when the door is closed. These type of sensors will wear out over time. Damage to the wiring or to the sensor itself will mean you’ll need to replace this part. Buying a X3 BMW door sensor switch will ensure you’ll get the right part for the make and model of your vehicle.

BMW trivia

  • It might not be the accessory that everyone needs, but for BMW drivers in South Africa who were worried about carjackers, the 'Blaster' was a flamethrower that shot huge flames from either side of the car. Not currently available in the UK…
  • Everyone knows what the BMW logo looks like, but do you know what it represents? Most people think it's inspired by propellers (because of BMW's aviation history), but it's really just the same colour scheme as the Bavarian flag and was designed to showcase Bavaria.
  • The BMW 3.0CSL was sold in the 70s and had the unusual addition of a spoiler that was kept in the boot. The owner could install it if they wanted to, but BMW couldn't sell the car with the spoiler attached because of road laws!
  • The BMW company was founded way back in 1916 and originally manufactured engines for planes. High demand for plane engines during WWI was good news for BMW, but they carried on making plane engines right up until 1945.
  • The main headquarters for BMW in Munich is designed and shaped to look like car parts. There was a whole new 'four-cylinder' building added on in 1973, and there's definitely the look of an engine about the architecture.