In-depth guide

How to Install a Dash Cam — Step-by-Step UK Guide

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Installing a dash cam is simpler than most drivers expect. A basic front-only setup takes around 20 minutes. You do not need specialist tools, and you will not need to remove any interior panels for the standard method.

This guide covers four installation methods, from the simplest plug-in setup to a hardwired parking mode installation.

What You Need Before You Start

For a basic installation:

  • Your dash cam and its mount (supplied in the box)
  • The USB power cable supplied with the cam
  • A pry tool or trim removal tool (a flat-head screwdriver wrapped in tape works)
  • Microfibre cloth to clean the windscreen

For a hardwire installation:

  • Hardwire kit (sold separately — must be compatible with your dash cam brand)
  • Fuse tap (usually included with the hardwire kit)
  • Multimeter (optional, to identify live and ignition fuses)

Check your dash cam’s mounting type before you start. Most cameras come with either a suction cup mount or an adhesive mount. Suction cup mounts are removable and easier to reposition. Adhesive mounts are more permanent and better for motorway driving.

How to Fit a Dash Cam — Basic Front Setup

This method powers the dash cam from your 12V/USB socket. The camera records when the ignition is on and stops when you switch off.

Step 1 — Clean the windscreen Wipe the area where you will mount the camera with a microfibre cloth. The adhesive or suction cup will not hold on a dusty or greasy surface. Mount position: behind the rear-view mirror, top-centre of the windscreen, within the wiper sweep area.

Step 2 — Attach the mount For suction cups: press firmly and lock the lever. For adhesive mounts: peel the backing, press against the glass for 30 seconds, and leave for at least 10 minutes before attaching the camera. In cold weather, warm the glass with a cloth first.

Step 3 — Attach the camera to the mount Slide or clip the dash cam onto the mount. Check you can still see clearly through the windscreen — the camera must not obstruct your view of the road. In the UK, legal placement is low on the passenger side or behind the rear-view mirror.

Step 4 — Route the cable to the 12V socket Run the USB cable from the camera along the top of the windscreen (tuck it under the rubber seal at the top), then down the A-pillar trim (the vertical trim between windscreen and driver’s door), and along the bottom of the dash to the 12V socket.

Do not let the cable hang across the driver’s line of sight.

Step 5 — Tuck the cable into the trim Use a trim pry tool or your fingernail to tuck the cable under the rubber windscreen seal and behind the A-pillar trim. No clips or cutting required — the cable sits neatly behind the existing trim.

Step 6 — Plug in and power on Plug the USB end into your dash cam’s 12V adapter and insert it into the socket. Start the engine. The camera should power on automatically and begin recording.

Step 7 — Adjust the angle With the car running, check the camera’s live view. Aim for the horizon centred in the frame, with approximately 60% road and 40% sky. Tighten the mount.

How to Hide Dash Cam Wires Properly

A trailing cable is the main reason dash cam installs look unprofessional. Hiding the wires takes an extra 10 minutes but makes a significant difference.

The standard route:

  1. Cable runs along the top of the windscreen (tucked under the rubber seal)
  2. Down behind the A-pillar trim — press the trim away slightly and feed the cable behind it
  3. Along the bottom of the dash, inside the footwell trim
  4. To the 12V socket or fuse box

Tools that help: A plastic pry tool (£3–5 from Amazon) prevents scratching the trim. Do not force the trim — A-pillar trims on modern cars clip rather than screw.

Cable clips: Most dash cams include small adhesive cable clips. Use these to secure any exposed sections before they reach the trim. Route the cable away from the airbag deployment path (check your vehicle handbook).

How to Install a Front and Rear Dash Cam

A rear camera connects to the front unit via a cable that runs around the inside of the car. Budget around 60–90 minutes for this.

Step 1 — Install the front camera first (see above)

Step 2 — Mount the rear camera The rear camera mounts on the inside of the rear windscreen. Most rear cameras use adhesive mounts. Position it centrally, within the wiper sweep if the rear has a wiper, avoiding the heated element lines if possible. Do not block your view in the rear-view mirror.

Step 3 — Route the rear cable From the front camera, run the connecting cable:

  • Across the headlining (the fabric roof lining) — tuck it under the edge trim
  • Down the B-pillar (between front and rear door) — the rubber door seal clips away to hide the cable
  • Down the C-pillar (behind the rear door) to the rear windscreen

This route keeps all wiring hidden inside the car’s existing trim. No drilling required.

Step 4 — Connect and test Plug the rear camera cable into the front unit. Power on and check both camera views are recording correctly.

Tip: Vans and SUVs need a longer rear cable — check the cable length before buying. Nextbase and Viofo both sell extended rear camera cables separately.

How to Hardwire a Dash Cam

Hardwiring connects the dash cam directly to the fuse box. This enables parking mode — the camera continues recording when the engine is off, capturing incidents in car parks and on the street.

This method requires a compatible hardwire kit (usually £15–30). Do not attempt this without the correct kit for your dash cam.

What you need:

  • Hardwire kit specific to your dash cam (e.g., Nextbase Hardwire Kit, Viofo HK3)
  • Fuse tap (usually included)
  • Trim pry tools
  • Basic multimeter (optional)

Step 1 — Find your fuse box Most UK cars have the fuse box under the dashboard on the driver’s side. Your vehicle handbook identifies the fuse locations.

Step 2 — Identify the correct fuses You need two fuse slots:

  • Ignition/accessory circuit (powers on with the engine — orange or red wire from hardwire kit)
  • Constant/always-on circuit (battery-backed for parking mode — yellow wire)

Common ignition fuses: radio, heated seats, interior lights. Common constant fuses: clock, OBD port. Use a fuse tap tester to confirm which is which, or refer to your vehicle handbook.

Step 3 — Install the fuse taps Fuse taps replace the existing fuse and add a second slot for the hardwire kit cable. Insert the fuse tap into the correct slot, then run the cables up to the dash cam location following the same cable routing as the basic install.

Step 4 — Ground the kit The black (earth) wire connects to a bare metal bolt on the car’s chassis. Under the dash there is usually a grounding point — a bolt going through the floor or firewall.

Step 5 — Connect and configure Connect the hardwire kit to the dash cam. In the camera’s settings, enable parking mode. Set the voltage cutoff (typically 11.6–12V for 12V vehicles) so the kit shuts off before draining the car battery.

Step 6 — Test Start the car, confirm normal recording. Switch off the engine — the camera should switch to parking mode. Motion or impact should trigger a parking recording.

If you are not confident working near the fuse box, a professional dash cam fitting service typically charges £80–120 for a hardwire installation.

Some cameras are significantly easier to self-install than others. Cameras with a separate GPS module, multiple power cable types, or very short power cables complicate the install.

Best for straightforward DIY installation:

  • Nextbase 522GW — Magnetic click-and-go mount attaches in seconds. Clear cable routing. Widely available at Halfords if you need in-store help.

  • Viofo A229 Plus — Adhesive mount, compact body, straightforward rear camera integration.

  • Nextbase iQ — Cloud-connected, single-cable USB-C power, no SD card management required.

See our full best dash cams UK guide for current recommendations across all budgets.

Professional Fitting vs DIY

For most drivers, a basic front installation is well within DIY capability. The steps above require no special tools, no cutting, and no permanent modifications to the vehicle.

Consider professional fitting if:

  • You want a hardwire installation and are not comfortable near the fuse box
  • You are installing a front and rear system in a vehicle with complex trim (some SUVs, prestige vehicles)
  • You want a guaranteed clean cable hide that retains warranty implications

Halfords dash cam fitting starts at approximately £49.99 for a front camera. Independent specialists typically charge £40–80 for a standard fit. Find a fitter in your area on our dash cam fitting near me page.

Does Fitting a Dash Cam Affect Your Insurance?

Self-fitting a dash cam does not void your car insurance. The camera is a removable accessory and does not modify the vehicle.

Some insurers offer a discount for dash cam use — see our guide on whether a dash cam lowers your insurance for a breakdown of UK insurer policies.

Frequently Asked Questions

How long does it take to fit a dash cam? A basic front-only installation with the USB cable routed into the 12V socket takes 20–30 minutes. A front and rear setup takes 60–90 minutes. A hardwire installation takes 60–90 minutes and requires more confidence near the fuse box.

Do I need to remove any panels to fit a dash cam? For a basic installation, no. The cable tucks behind the A-pillar trim by pressing it gently — no removal needed. For a front and rear installation, you will need to press the headlining trim and door seals away from the bodywork slightly.

Where should a dash cam be mounted on the windscreen? Behind the rear-view mirror is the most common position. In the UK, the Highway Code requires that nothing obstructs the driver’s view. The camera must sit within the windscreen wiper sweep area and not block any sensors (forward collision, lane assist) which are often positioned at the top of the windscreen.

Can I fit a dash cam in a leased car? Yes. A dash cam using a suction cup or non-permanent adhesive mount does not permanently modify the vehicle. Remove it and clean the glass before returning the car. Avoid drilling or permanent mounting in a leased vehicle.

What is a hardwire kit and do I need one? A hardwire kit connects your dash cam to the car’s fuse box so it receives power directly from the battery. This enables parking mode — the camera records when the engine is off. Without a hardwire kit, the camera only records while the engine is running. If you park on a street or use a car park, parking mode is worth having.

Will fitting a dash cam drain my car battery? A correctly configured hardwire kit will not drain your battery. The kit includes a voltage cutoff — when the battery voltage drops to a set level (typically 11.6–12V), the kit cuts power to the camera. Always use the cutoff feature. Cameras in parking mode draw approximately 200–300mA, which on a standard 60Ah battery gives 6–8 hours of recording before the cutoff activates.

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