2008 Nissan Frontier - Balance Shaft Belt
The balance shaft belt connects the vehicle's balance shafts to synchronize their timing to the crankshaft and counteract engine vibrations caused by the combustion cycle. The balance shaft is a rotating shaft powered by the crankshaft and is used to reduce engine vibration. A balance shaft belt is made of rubber, and it is typically located near the front of the engine block or behind the timing cover.