What are the reasons for a car not being able to engage reverse gear?

[Bustamante]

The reasons for not being able to engage reverse gear include the clutch not being fully depressed, the gear teeth aligning exactly, or issues with the car's transmission. Clutch not fully depressed: For manual transmission cars, some require the clutch pedal to be fully depressed to engage gears. Solution: Simply press the clutch pedal deeper to resolve this issue. Gear teeth aligning exactly: Many cars do not have synchronizers installed for reverse gear, so when attempting to engage reverse, the teeth of the two gears may align exactly, causing the gear to jam and preventing engagement. Solution: Shift into a forward gear first, then try engaging reverse again. Issues with the car's transmission: When shifting from a higher gear to a lower gear, it's easy to cause impact between the gear teeth or spline teeth. The synchronizer's role is to prevent such impacts. The main components of a synchronizer include the engaging sleeve and synchronizer ring, achieving synchronization primarily through friction. Solution: It is recommended to visit a 4S shop for repair. The required repair costs may be relatively high, and the repair time may be lengthy.