The belt drives the vehicle’s alternator, air conditioning compressor, power steering pump, and water pump. On some vehicles, it can also drive the cooling fan. The belt is a critical component of your vehicle’s maintenance. If your vehicle’s belt is beginning to show signs of wear such as cracking or grooves, it may be time for replacement. At Express Lube Greenbriar, our trained technicians can detect and replace worn belts. Express Lube Greenbriar recommends replacing your vehicle’s serpentine belt every 100,000 miles.