What is the reason for not being able to shift into first gear?

[McEmery]

The reasons for not being able to shift into first gear: 1. Clutch cable failure: Some manual transmission cars still use cables to control the clutch. The outer sheath of the cable is prone to cracking, leading to difficulty in shifting gears due to no clutch engagement. This issue is relatively simple to fix—just replace the cable. 2. Clutch master cylinder failure: The clutch hydraulic master cylinder may experience pressure loss or oil leakage during use, resulting in the inability to shift gears when pressing the clutch pedal. In this case, the clutch master cylinder needs to be replaced at a repair shop, followed by a bleeding operation. 3. Transmission failure: Issues such as insufficient transmission fluid, stuck transmission shift mechanism, or failure of a specific gear or fork can all cause difficulty in shifting gears or the inability to engage a gear. For transmission-related problems, it is necessary to have the vehicle inspected at a professional repair shop.