The hardwire kit
What a dash cam hardwire kit costs, and what fitting adds on top
A dash cam hardwire kit is the cheap part. What professional fitting adds on top depends entirely on who does the job. Some fitters treat wiring it in as part of a standard fit. Others charge it as separate labour. The parts-only price is below, sourced and dated like everything else on this page.
From there the spread is wide. Read every figure on its own receipt rather than trusting a single "typical cost" line, because the fitters themselves do not agree with each other. Last reviewed 9 July 2026.
Does hardwiring cost extra?
The kit is one price. Having someone wire it in is another, and it does not scale the way you might expect.
The kit itself is cheap, shown above. Whether a fitter charges more to wire it in properly depends entirely on them: the sourced figures below show a hardwire fit costing the same as some plug-in only jobs at one fitter, and a complex four hour job at another.
Halfords hardwired mine for £35 including the kitMoneySavingExpert forum (Birdman2015) ·
Halfords publishes no price. This figure conflicts with the £70 and £55/£80 figures below.
The only fixed, published, checkable fitting price we could find anywhere in the UK.
The high end. A difficult car, not a typical job.
Will a hardwired dash cam drain the battery?
Not if the kit is fitted correctly. The low voltage cut-off built into a hardwire kit is what prevents battery drain: it disconnects the camera once the battery voltage drops to a preset level, well before the car would fail to start. A kit without a working cut-off, or one wired to the wrong fuse, is the failure mode that actually flattens a battery.
Can you retrofit hardwiring later?
Yes. A hardwire kit is a separate part from the camera and connects at the same power point a cigarette lighter cable would use, so it can be added at any point after the camera is already running on a plug-in lead.
Is DIY hardwiring safe?
The risk is not unique to doing it yourself. No documented case we could find was DIY specifically: both wiring mistakes on record happened on professional fits, and neither was cheap to put right.
One case wired a dash cam into the airbag circuit instead of the cigarette lighter circuit, on a professional fit. Another damaged the rear cable routing on a Volkswagen, also on a professional fit, and needed a dealer repair. Both costs are below, sourced to PistonHeads.
The retailer has agreed to pay £290 for the VW dealer to fix it.PistonHeads (PF62) ·
Doing the job yourself with no training carries at least the same risk: a professional fitter can make this mistake too, and there is no one to send the bill to afterwards. Paying an auto electrician removes that risk rather than shifting it, when you cannot confidently identify live, switched, and safety-critical circuits on the car.
Questions
Do you need a hardwire kit for parking mode?
Yes. Parking mode needs power while the ignition is off, and the 12V socket loses power with it in most cars. A hardwire kit taps a fuse that stays live instead, which is the actual reason most people pay for one rather than running a cable to the socket.
What does a voltage cut-off do?
It monitors the battery voltage while the ignition is off and disconnects the dash cam once voltage drops to a preset level, stopping parking mode recording before the battery gets too flat to start the engine. It is the part that makes hardwiring for parking mode viable at all.
Is DIY hardwiring safe?
The two documented wiring mistakes on record both happened on professional fits, not DIY jobs, which is exactly why a fitter cannot be treated as automatically safer. See "Is DIY hardwiring safe" further up this page for both cases and their cost.
Last reviewed 9 July 2026