Years of exposure to UV rays affects the plastic of your turn signals. UV rays break the chemical bonds of the polymer. This process leads to discoloration, cracks and loss of mechanical properties.
Maintaining perfect turn indicator glass is therefore only possible for cars that have been exposed to very little sunlight, most of which will start to most of them will start to show defects, discoloration being the first and, right after, cracks will be the reason why a replacement is necessary.
Useful information from Paruzzi magazine and from our YouTube channel :
Look for more technical articles on the page Paruzzi Magazine