What are the reasons for not being able to book the subject 4 exam on 12123?
3 Answers
The reasons for not being able to book the subject 4 exam on 12123: Insufficient or invalid study hours: To book the subject 4 exam, you must complete 10 study hours, with no more than 4 hours per day. Invalid study hours may occur if you are simultaneously training for multiple subjects, such as studying theory for subject 1 and subject 4 at the same time, or training for subject 1 and subject 2 concurrently. It is recommended not to study different subjects on the same day. Photo discrepancies can also lead to invalid study hours. If the photo taken during training differs significantly from the one submitted during registration due to pose, angle, or makeup, the system may flag it as a mismatch. Not meeting the exam cycle: Typically, after passing subject 3, you must wait for an exam cycle before booking subject 4. The duration of this cycle varies by region, usually around 10 days, depending on local administrative efficiency. The success of booking the exam also depends on factors such as the number of applicants, exam capacity, and your registration ranking, so there is no precise timeframe for when you can take the subject 4 exam.
I recently encountered this reservation issue as well, and I feel it’s mainly due to the 12123 App occasionally malfunctioning, possibly due to server congestion or backend errors. Unstable network signals, especially during peak hours when many people are trying, make it hard to secure a spot. The limited number of slots for the Subject 4 exam and delayed updates showing them as full when they might not have released slots yet add to the problem. My advice is to refresh the APP as early as 8 a.m. to check for the latest slots or try a slightly more remote test center. Reinstalling the App and ensuring it’s updated to the latest version solved my issue before. Also, keep an eye on official notices, as sometimes the system undergoes maintenance and temporarily closes reservations. Contacting online customer service with screenshots can help them quickly troubleshoot—don’t worry, you’ll eventually get a slot.
It's quite common to be unable to book the Subject 4 test, mostly because the exam slots are full. The 12123 platform has limited slots, and everyone is competing for them, making it especially difficult before weekends or holidays. Try refreshing the page at 9 AM on a weekday at the vehicle management office, as this is when new slots are more likely to be released. If you see an error message, it might be due to unsynchronized personal information, such as data not being uploaded promptly after passing Subject 3. Check if your account's bound phone number and ID card match. If all else fails, go directly to the local vehicle management office's service window to book an appointment—it saves time and hassle. Meanwhile, keep studying the safe driving knowledge for Subject 4, and don't let this delay your learning progress.
