Car electronic accessories
1. My personal opinion and common sense

I think there is no special law that regulate selling/manufacturing of devices like this.

If I understand correctly - your device will be not connected with car and it will not modify car, so it is not car part. It does not affect any electrical, mechanical or safety system. It is not changing car behavior, fuel consumption, toxic substance emission etc. It is something like car TV or GPS receiver.

I heard somewhere that in Australia you cannot ship device with batteries to consumer, I'm not sure what is this about, but careful if you have some backup battery in your system.

FCC certyfication applies to communication devices like WiFi card, which is not your product. You will just resell it, so all you have to do is use FCC-certified device in your project.

End of personal opinion



2. Some facts about law and devices in car

You have to read regulations about placing anything on windshield. For example in USA - diffrent states have diffrent laws about that.

Another very important thing is that in some countries (and some states in US) driver cannot have any turned on screens in visibility range when he is driving.

In Europe we have 3 very important acts related with electronics:


RoHS - Restriction of Hazardous Substances


In typical electronics - it's about buying parts with RoHS mark and using lead-free solder.


act about CE marking (more info: link)



  The CE marking is required for many products. It states that the
  product is assessed before being placed on the market and meets EU
  safety, health and environmental protection requirements.



act about Electromagnetic Compatibility (EMC) (more info: link, more practical info: link)



  All electric devices or installations influence each other when
  interconnected or close to each other. Sometimes you observe
  interference between your TV set, your GSM handset, your radio and
  nearby washing machine or electrical power lines. The purpose of
  electromagnetic compatibility (EMC) is to keep all those side effects
  under reasonable control. EMC designates all the existing and future
  techniques and technologies for reducing disturbance and enhancing
  immunity.


Here is a guide about EMC: link

Most important information for you:


  A combination of several finished appliances which is made
  commercially available as a single functional unit intended for the
  end-user is considered to be apparatus31. Such a system, within the
  sense of the EMC Directive, is combined, and/or designed and/or put
  together by the same person (the “manufacturer”) and is intended to be
  placed on the market for distribution as a single functional unit for
  end-use and to be installed and operated together to perform a
  specific task. All provisions of the EMC Directive, as defined for
  apparatus, apply to the combination as a whole. It should be noted
  that combining two or more CE marked finished appliances does not
  automatically produce a “compliant” system e.g.: a combination of CE
  marked Programmable Logic Controllers and motor drives may fail to
  meet the protection requirements.


So if you want to build your product with ITX board, wifi card and some power supply - you have to test it for Electromagnetic Compatibility. Manufacturer can do it himself or pay for some laboratory to do it.



3. Personal opinion again

I think all you have to do is:


inform your customers how to install screen properly to help them avoid problems with law
follow rules about typical consumer electronics (CE in Europe, I don't know what is required in US and if there is some CE equivalent)