The symptoms of release bearing failure include: 1. The neutral gear sound is normal, and there is a rustling sound when stepping on the clutch; 2. When driving with gear, there is a sound like metal friction, which does not affect normal driving. If the release bearing is damaged, it will affect the normal operation of the engine, so replace it immediately after the release bearing is damaged. The release bearing is connected with the clutch pedal. After stepping on the clutch pedal, the release bearing will counter the diaphragm spring on the pressure plate. At this time, the diaphragm spring will jack up, so that the clutch plate can be separated, and the connection between the engine and the transmission may also be broken. When the clutch pedal is lifted, the release bearing will not hold against the diaphragm spring. At this time, the diaphragm spring will hold the clutch plate. The engine and transmission can be connected together, and the power of the engine can be transmitted to the wheels.