Choose a front-only dash cam if you mainly want a record of the road ahead while driving; choose front-and-rear recording if events behind the car matter too. For unattended-car evidence, confirm the exact camera’s parking mode, compatible power supply and battery-protection settings before buying. A parking mode that starts after an impact does not provide the same footage as continuous recording.
If you regularly leave your car in a public or shared parking area, check whether the exact camera can record while the vehicle is off, how it gets power and when that power supply cuts out. Garmin’s Parking Guard, for example, requires constant power.
If an event behind the car matters as much as one ahead, a dedicated rear camera adds another view. VIOFO describes its dual-channel systems as recording the road ahead and behind simultaneously; check the channels and modes of the particular system you choose.
If your main concern is the road ahead while driving, a front-only camera avoids rear-camera cable routing. Accept that it provides no dedicated rear view, and do not assume a plug-in setup will keep recording after you switch off the car.
Decide which direction you need to record, then whether recording must continue when the car is unattended. Parking coverage is a separate choice from front-and-rear coverage: a camera may offer either, both or neither, depending on the model and installation.
| Concern | What to check | Who this matters to |
|---|---|---|
| Parked-car recording and power | Confirm the exact parking mode, compatible constant-power cable or kit, and cutoff or timer settings. | If I leave my car unattended, I need to know whether a bump will be captured after the ignition is off. Around 36% of consumers put dependable parked-car recording and its power arrangement first. |
| Front-and-rear coverage | Check whether a rear camera is included and whether both channels record in the modes you intend to use. | When an event happens behind my car, a forward view alone will miss that perspective. For roughly 29% of consumers, recording both directions is the primary concern. |
| Footage and file retention | Compare each channel’s recording specification, compatible microSD card requirements and handling of protected event files. | I want to retrieve the relevant clip and judge what it shows, including in difficult light. About 21% of consumers place footage detail and retention ahead of the other concerns. |
| Simple driving-only setup | Check the outlet’s power behaviour and plan a mount and cable route that leave the driver’s view clear. | If I only need a forward record during a journey, I would rather avoid routing a rear cable or installing a parking-power accessory. Around 14% of consumers prioritise that simpler setup. |
Parking modes retain different amounts of footage. Garmin describes an impact-triggered clip for Parking Guard, while Nextbase describes a protected file recorded after a detected bump or movement on its Series 2 models. Neither description promises a continuous record of everything before an event.
Check the exact model’s trigger, what it captures before and after an event, whether the rear channel also operates, and the power accessory it requires.
A camera cannot keep recording on a supply that switches off with the ignition unless its supported setup provides another way to power parking mode. Garmin says Parking Guard requires constant power.
Check the vehicle outlet and the camera’s compatible power options together, rather than relying on the cable’s connector type.
You may need a separate compatible constant-power cable or hardwire kit and a more involved installation.
Department for Transport and Driver and Vehicle Standards Agency guidance says items on a vehicle’s windows must not block the driver’s view.
Plan the camera position and cable route before fitting them, keeping the assembly clear of the area you need to see through while driving.
The Information Commissioner’s Office distinguishes purely personal or household activity from professional or commercial processing. Its guidance says organisations using surveillance that processes identifiable people’s data need to comply with the UK GDPR and Data Protection Act 2018.
If the camera is used for work or another non-personal purpose, check the applicable ICO guidance for your use, including transparency, retention and secure handling of footage.
Relevant if you are considering an impact-triggered parking feature and compatible camera accessories.
Relevant if you want to examine a documented parking mode alongside compatible constant-power accessories.
Relevant if you are comparing single- and multi-channel recording, including dedicated front-and-rear systems.
Not necessarily: you need a power source that stays available after the car is switched off and that the exact camera supports for parking mode. Garmin says Parking Guard requires constant power and identifies compatible cable options and an always-on 12V outlet as possible arrangements; an ignition-switched outlet may stop recording.
Only if you can follow the instructions for both the camera and vehicle safely. Garmin strongly recommends an experienced installer for its parking cable and warns that incorrect wiring can damage the vehicle or battery or cause injury. Check the supported fuse connection, cable compatibility and routing before arranging installation.
Mount it where the camera, mount and cable do not obstruct your view. Department for Transport and Driver and Vehicle Standards Agency guidance says items placed on vehicle windows must not block the driver’s view; check the proposed position from the driving seat before fixing the camera in place.
The purpose of the recording matters. The Information Commissioner’s Office says purely personal or household processing with no professional or commercial connection falls outside the UK GDPR’s scope. If an organisation uses a dash cam to process footage of identifiable people, the ICO says the UK GDPR and Data Protection Act 2018 apply; check the guidance for the specific use before recording for work.