
Continue scheduling. Generally, you can schedule the Subject 4 test after passing the Subject 3 test. Here is some additional information: 1. Reasons for unavailability: First, there may be too many people scheduling at the same time, and if your priority is lower than others, you might be bumped off the list. Second, system issues—sometimes the system is under too much pressure, leading to some students being unable to schedule, and you can only wait for the system to be fixed. 2. Subject 4: Subject 4, also known as the Subject 4 theory test or driver theory test, is part of the motor vehicle driver's license examination. The Subject 3 test consists of two parts: the road test and an additional safety and civility knowledge test, commonly referred to as "Subject 4," which assesses "driving ethics." Since this test is conducted after Subject 3, it is commonly called the Subject 4 test. However, there is no official term "Subject 4" in the regulations.

I was also desperate when I couldn't book the Subject 4 test, but later found a trick: open the 12123 App around 3-4 AM every day to refresh, as the system often quietly releases new slots during this time—don't sleep in and miss it. After failing to book during peak times several times, I chose a less crowded test center nearby and got a slot immediately—the test content is the same anyway. Remember to stay logged into the App to avoid disconnection, check if your personal info is correct, and confirm your Subject 3 results are approved. If all else fails, wait patiently for a week or two; slots will be released gradually—don't stress too much. Many people face this issue with Subject 4 bookings—it's not a big deal, so don't let it affect your driving mood; safety comes first. After about a week, I successfully booked and took the test promptly.

If you're having trouble scheduling your Subject 4 exam, I recommend frequently refreshing the Driving Test App or 12123 App manually. The system's available slots often change, so it's a matter of luck. Personally, I checked every half hour and eventually found an open slot. Also, consider trying different test centers, as some areas may have more availability, especially during weekdays or afternoon sessions when there are fewer people. Don't too much on automatic queuing tools—they're unsafe and against the rules. Additionally, make sure your Subject 3 exam is genuinely passed by checking the backend status. You can also ask your instructor; they sometimes have insider information and can notify you in advance. Not being able to schedule now doesn't mean it's forever—opportunities will come. Stay positive, keep practicing the theoretical exam points, and try booking during less popular times for easier scheduling.

From my experience in handling such matters, first check the basic reasons, such as whether the subject three results have been recorded to avoid wasted effort. The system has limited slots, and it's normal not to get one during peak hours—don't force it. Instead, consider other test centers or early/late time slots for better chances. Contact your instructor for help; they are experienced and familiar with the process, which might help arrange an earlier slot. Wait patiently for system updates and avoid frequently reloading the page, as it may cause errors or freeze your account. Ensure a stable internet connection and avoid refreshing in areas with poor signal. Don't give up—it usually takes about one to two weeks to resolve, and it won't affect the subsequent steps of getting your license. What's important is to complete the safety test successfully.

Back when I was stuck trying to book the Subject 4 test, I realized it's totally normal for slots to fill up fast—it gets crowded a month before major exams. My advice is to avoid peak times; don't rush at the start of the month. Wait until mid or late month when slots free up and become easier to book. When using the app, double-check your ID number and driving school info—any mistakes mean instant rejection. Keep your or laptop charged to avoid losing progress mid-booking. If slots are tight, try multiple times without panic; the system releases slots periodically. The test content stays the same, so prepare thoroughly without rushing. Master the driving theory to pass in one go once booked—saves hassle and effort.

I was quite frustrated when I couldn't schedule the subject four test. Later, I figured out a method: first check if my subject three test was successfully passed through the system to avoid wasting time. Then, focus on refreshing the official App 12123, as it often updates available slots around 8-9 AM or 8 PM—try these time slots. Don't just focus on one test center; consider nearby cities or farther locations where there are more slots available. Avoid trusting unofficial booking services—they're unsafe. It's more reliable to manually refresh the app yourself with a stable connection. If you can't book a slot, don't panic; wait a few days as new slots will be released. Meanwhile, review safe driving knowledge and prepare for the subject four test in advance to ensure passing it on the first try for greater efficiency.


