Nowadays, there is a growing number of companies that manufacture defective auto parts. They lure buyers with cheap prices, use much cheaper, lower strength materials, and sell defective auto parts that have not even been tested for safety. Using such auto parts may not cause problems at first, but one day it may suddenly cause problems while driving, seriously endangering the safety of drivers. To weed out these rogue manufacturers, you should be suspicious of auto parts that are sold at too low a price, and look for official markings, including safety inspection marks, on legitimate companies that follow the regulations for manufacturing auto parts.