Why is there no rearview mirror after installing a dash cam?

[RemingtonDella]

Installing a dash cam without a rearview mirror is because the dash cam is not connected to the vehicle. The dash cam is not connected to the vehicle: If the dash cam is powered by a battery and not connected to the vehicle, the rearview function of the dash cam cannot be activated. In this case, the dash cam needs to be connected to the car, and the rearview function must be properly set up for it to display normally. The installed dash cam must be mounted on the rearview mirror. When the screen is turned off, this type of dash cam can be used as a rearview mirror, but the screen must be turned off. Turning off the screen does not affect the normal recording function of the dash cam. Damaged camera: If the rear camera of the vehicle is damaged, the dash cam will not be able to display the rear view. There are many reasons for camera damage, and it is necessary to have it inspected and repaired by professionals at a repair shop. When the car is not started, the dash cam has no power. Only after starting the car and the dash cam is properly powered can the rearview function be used normally.

[Ian]

I noticed you installed a dash cam but found it doesn't have a rearview mirror, which is quite common. Dash cams are primarily designed to record driving scenes, like a small camera mounted on the windshield. They aren't built with rearview mirror functionality because rearview mirrors are original equipment that comes standard with vehicles—keeping them separate is simpler and more practical. Integrating both would increase product costs, complicate installation, and potentially distract drivers, compromising safety. With years of driving experience, I've found it best to let dash cams and rearview mirrors serve their respective purposes: one focuses on recording evidence in case of accidents, while the other assists with real-time road visibility. Although there are a few integrated streaming rearview mirror dash cams on the market, they're expensive, power-dependent, and prone to malfunctions. It's better to use them separately—cost-effective and reliable. After installing a regular dash cam, simply adjust the original rearview mirror manually. Don't expect it to replace the mirror's function.

[ReidRose]

From a technical perspective, it makes sense that dash cams and rearview mirrors aren't integrated. Their core functions differ fundamentally - a dash cam is essentially a camera with memory storage for recording video evidence, while a rearview mirror is an optical reflector that must provide instant, clear visibility while driving. Forced integration would increase electronic complexity and costs, requiring additional wiring for power redundancy to prevent failures. Moreover, if the electronic screen fails, there's no backup. Having tested various car accessories, I've found this separate design prevents interference with original safety systems, and regulations actually mandate that rearview mirrors remain independently reliable. If you truly want a 2-in-1 solution, look for premium-brand streaming rearview mirror models - though they're expensive and complex to install. Most users still prefer separate installations for peace of mind, as simplicity often equals elegance.

[DiGraham]

Safety should always be the top priority, so the dash cam and rearview mirror must be kept separate. The core function of a dash cam is recording, not serving as a mirror. Its screen may be small, have low resolution, or exhibit lag, making it completely incapable of replacing the real-time reflection of a standard rearview mirror. The rearview mirror is a mandatory safety device—if the dash cam fails or crashes while driving, you lose visibility of what's behind you, increasing collision risks. I've tried integrated products, but relying solely on the screen to check behind during sharp turns can easily cause dizziness. Insist on using the original rearview mirror independently to ensure clarity and safety, letting the dash cam solely play its recording role.