How do you remove a broken spark plug on a 93 volvo 850?

To remove a broken spark plug from a 1993 Volvo 850, first, ensure the engine is cool and disconnect the battery. Use a spark plug extraction tool or a left-handed drill bit to carefully drill into the center of the broken plug. Once you have created a hole, you can use an easy-out tool to grip and twist out the broken piece. If the plug is severely damaged, you may need to use a tap to clean the threads before installing a new spark plug.