Canadian Tire Auto Service at 700 Lawrence Avenue West, Toronto, potentially could have endangered our lives with two serious errors! 1) A flat tire was poorly repaired and went flat again within a few hours. 2) That flat tire was repaired by plug and patch, even though the puncture was on the shoulder of the tire, contrary to industry standards and guidelines. A new tire should have been recommended. Three independent tire experts who saw the repaired tire confirmed that it was an unsafe repair and very dangerous.