If it's the same as 'cincha de trincaje', then tie-down strap/ratchet strap might be right.

https://www.tarifafunworks.com/surf/23/accesorios/1151/cinch...

Have you been working on tying down your cargos? If so, then you may be looking for an effective tying material that can hold the equipment effectively. What you need are ratchet straps from Damar Webbing Solutions.

https://slingsandstraps.co.uk/collections/ratchet-straps

Cinchas de trincaje amarre interior frigorífico EN 1295-2

https://www.recambiosdelcamion.com/tienda/carga-seguridad/si...

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Note added at 3 hrs (2019-11-29 18:27:12 GMT)
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The reference below is used in horse-riding, not cars, but I thought it was interesting!

A girth, sometimes called a cinch (Western riding), is a piece of equipment used to keep the saddle in place on a horse or other animal. It passes under the barrel of the equine, usually attached to the saddle on both sides by two or three leather straps called billets.

https://en.wikipedia.org/wiki/Girth_(tack)

Trincaje es la acción necesaria de sujetar, inmovilizando firmemente mediante los materiales o elementos necesarios y adecuados, todo tipo de bultos, cajas, palets, máquinas y en general, todo tipo de mercancías que sean transportadas con medios marítimos, terrestres o aéreos, con la finalidad de prevenir y evitar posibles daños por golpes, rozaduras, desplazamientos o vuelcos en su contenido, continente y medio de transporte, mejorando también la seguridad de los mismos.

http://www.sea-trincajes.com/Que es el trincaje.html