Agree, stay away from Halfords for all but their Advanced range of tools which are actually very very good and carry a lifetime warranty.
Not all but insurance companies in general do ask for proof of both hardwire and professional installation else I would not have mentioned it. While almost every type of dashcam system available is indeed installable as a DIY I think you will find that you do need a good selection of tools in order to complete an installation without faffing about and the need to revisit "parts" of said install at a later date, especially if you are also installing as external battery unit. I myself use the following:
- A selection of nylon and metal trim tools
- Snake cable and rods
- Torch
- Ratchet Crimps
- Wire Strippers
- Assorted Automotive cable
- Heat Shrink Butt Connectors (OEM VW Group with Glue)
- Heat Gun
- Socket Set
- Pick Set
- Screw Driver Set
- Multi Meter
- Assorted OEM Connectors
- Magnetic Trey
- Microfibre Cloths
- TESA / Loom Tape
- OBD Diagnostic Tool
I also keep a stock of all types of OEM trim clips incase some break, if you are looking to pull your car apart I would suggest getting some just incase. The use of Ty-Rap's / Cable Ties should be discouraged as they can cut in to wires due to driving vibrations. Same goes for soldering as joins can crack.
The amount of installations I end up finishing because people have bitten off more than they can chew is surprising. Most would not be happy removing the rear trim of an RS3 in order to complete a proper job:
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Like to see someone do this with a couple of simple tools