Posted on 3rd December 2020 in the categories: Magnetics, Automotive Industry

Where Can Magnets Be Used in Cars?

Where Can Magnets Be Used in Cars_

Magnets can be found in most things and we do not even realise it. From the device you are reading this post on, to the speaker in your room, magnets are exceedingly versatile. Magnets are used extensively in the automotive industry, from the production line right through to the final product. We take a look at some of the main ways in which magnets are used in cars.

Seat belt detection

In recent years, cars detect if a seat belt is clipped in and will sound an irritating noise if not. These systems use reed switches that change the flow of electricity depending on the presence of a magnet and the type of reed switch.

Door positioning

Modern day cars contain alarms that are built in to alert the driver when the doors are not shut properly. This is a similar system to the one used for seat belt detection, whereby the doors operate on a reed switch system where  the flow of electricity to the alarm depends on whether the magnet inside the door is in contact with the reed switch. If it does not detect the magnet, it will sound and alert you to the opened door.

ABS braking system

Anti-lock braking systems were designed to help prevent accidents by allowing vehicles to stop quicker while also allowing drivers to steer as the car slows down. Magnets are used in ABS systems to help attach them to the car and keep them in place. The magnetism is permanent, unlike that of electromagnets where an electrical source is required.

Production line

In the automotive industry, magnets are used from the very beginning, from the production line right through to the end product. During production, parts must be held in place. Therefore, manufacturers install heavy duty magnets to lift large components onto the vehicle, such as the outer shells and doors. This proves helpful when putting the vehicle together, keeping the parts still for fitting.

Car roof magnets

One of the most recognisable examples of magnets in the automotive industry is car roof magnets, more commonly known as ‘Taxi Magnets’ due to their extensive use of holding taxi signs to the roofs of cars. The magnets used in this application are clamping magnets, where they are used to attach the sign to the roof of a car without damaging the car and preventing the sign from sliding off.

Tracking systems 

Magnets are used in cars tracking systems. When a car moves along any surface, some parts of the car move around. It is important that the tracking systems sits in place so that it functions correctly. Therefore, Neodymium magnets are used to keep the racking system secure and in place to avoid any damage to its functionality.

Goudsmit UK

As an established permanent magnet manufacturer, we offer a wealth of experience in not only the automotive industry, but also in the medical, aerospace, renewable energy and oil and gas sectors. Our extensive range of solutions can help you improve output quality, productivity, and the lifespan of your machines. Should you have a special requirement, our team of design engineers will be happy to create a custom solution. All magnetic products manufactured by Goudsmit UK also meet or exceed ISO 9001, AS 9120B and IATF 16949 quality standards.

Contact our team on (+44) 02890 271 001 or email us at

Download our products and services brochure here.

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