First you should know that it is a Gas Cap Cover, this instrument is a measure of prevention and blocking the entry of your vehicle's fuel tank. The increase in fuel thefts generated this new security measure will be created.
Remember that if your vehicle is of the latest models, this will be an unnecessary purchase. If your vehicle has a fuel lock cap there is no need to make the purchase as it will be fully protected.
We recommend buying in areas of frequent theft or if you travel constantly and leave your vehicle in the open.
You need a new fuel cap for damage or loss in the current one. While you should replace your fuel cap it would be best to do it with one of this type since the prices are similar but this has an extra benefit. Please note: the plug wears out after certain years and it is advisable to make changes every 4 years.