Why is there no alarm when the new car is hit after locking?

[OMila]

New car locked but no alarm when hit is due to a damaged alarm system. Here are the specific details about car alarms: 1. Definition: A car alarm is an alarm device installed in a vehicle. If someone hits, impacts, or moves the car, the sensor sends a signal to the controller indicating the vibration intensity. Depending on the vibration intensity, the controller will emit a warning sound or trigger a full alarm. This serves to deter thieves and alert the owner. 2. System composition: The most basic car alarm system generally consists of one or more sensors connected to an alarm device.

[Madeleine]

I recently encountered a similar issue with my new car – it didn't sound any alarm when someone bumped into it after locking. This is quite concerning. There are usually several reasons for this: First, the anti-theft system might not be properly set up. You might not have pressed the correct button on the key fob when locking, or the door might not have been fully closed, preventing the sensors from activating the alarm. Second, the sensor sensitivity might be set too low. If the factory default setting is relatively low, minor impacts won't trigger the alarm, which is common in parking lots. Third, there could be an electrical issue, such as a blown fuse or loose wiring, causing the alarm not to work. Sometimes this is also related to battery power – new cars might have insufficient battery charge during transportation. I suggest doing some basic checks first: After locking the car, try pulling the door handle to ensure it's locked, then gently tap the body. If there's no response, check the dashboard for any error messages inside the car. If that doesn't help, try resetting the system as per the car manual. If you still can't resolve it, take it to a 4S shop or professional repair shop immediately. Safety comes first – don't wait until something serious happens to regret it.

[DelDaisy]

As an enthusiast with over a decade of driving experience, I believe that a new car's anti-theft alarm not responding is mostly due to user error or system malfunction. Possible reasons include: the alarm system not activating after locking the car—check if you pressed the correct button on the remote key, as some cars require a long press or quick double-click; sensors like the shock sensor failing, being overly sensitive or insensitive can cause no response, and new cars might have lax factory testing; or low battery voltage affecting signal transmission. My advice is to manually test: after locking the car, gently kick the tire to see if the horn sounds. If there's no reaction, open the hood and check if any fuses in the fuse box are blown. Also, don’t overlook software—modern cars come with smart systems, so try updating settings or adjusting sensitivity via a connected app. If you can’t figure it out, take it to a professional shop to avoid theft risks.

[MacMaria]

Encountering a new car locking without an alarm is mainly caused by minor daily issues. The most common reasons are insufficient key battery or improper use, where the weak remote signal fails to trigger the system; another possibility is a stuck or misconfigured door lock sensor—check if all doors and the trunk are tightly closed. Don’t panic if this happens with a new car; troubleshoot it yourself: first lock the car, then gently tap different parts of the body to test the response. If that doesn’t work, try using a different key. A five-minute check should resolve the issue.

[MacNora]

It's really disheartening when something like this happens to a new car. I also felt frustrated last time when my car was hit without the alarm going off. Possible reasons include sensor placement issues or environmental interference, such as parking in a noisy area where the alarm might be suppressed; minor fuse problems that weren't detected before leaving the factory. Don't worry, check the manual for the anti-theft system section, restart the vehicle, or go to the 4S store for a free inspection. Address it promptly to prevent things from getting worse.