Q. Is it really necessary to replace my timing belt at the manufacturer recommended interval?

The vehicles timing belt or timing chain is a critical part of the engine that controls the synchronizes the rotation of the crankshaft and the camshaft(s) so that the engine's valves open and close at the proper times during each cylinder's intake and exhaust strokes

YES. The failure of a timing belt or chain in many cars can result in major engine damage. The cost of repairing an engine with a broken timing belt is much greater than the cost of a timing belt replacement. Typically this is replaced every 100k KM service, however check your vehicle's manufacturers manual for log book.