What is Can Bus?Do my  car dvd player need to install can bus?

At the first,let's read the instruction fromWiki:

Controller–area network (CAN or CAN-bus) is a vehicle bus standard designed to allow microcontrollers and devices to communicate with each other within a vehicle without a host computer.

CAN is a message based protocol, designed specifically for automotive applications but now also used in other areas such as industrial automation and medical equipment.

For the car dvd player,we need the can bus to make the original information work,such as used for transmission, airbags, antilock braking, cruise control, audio systems, windows, doors, mirror adjustment, etc.And the main function to make the steering wheel control work after we replace the car dvd player to the cd player,and to make the original lcd or the car information working as original.Check the samples below:

This is the Car DVD Player for Mazda3 which need can bus:

Some of the car dvd player use built-in can bus,but some other factory prefer an external can bus box,like this one:

These have the same function and result,only one things that is  difference is that you can not see the inside can bus by your eye,but you can find the external can bus box in the accessories box.Actually,it doesn't matter about whether it is  inside or external box,they are same.The importance is that we need to use can bus, no matter inside or external box,for some cars,if it do not have can bus,that it may lose some of the original function like steering wheel control,and,here,we'll  list the cars which need can bus to make the car dvd player working fine.As our experience,these cars need can bus for the car dvd player working:

Audi:A3,A4 and the other all

BMW:E46,E39 and the other all

Chevrolet:Cruze

Chrysler:Sebring,300C and the other all

Ctiroen:C4:C-Triomphe:C-Quatre

Dodge:Charger,Ram,Durango and the other all

Ford:Focus,Mondeo,S-Max,Fiesta

GMC:Yukon,suburban,Tahoe,Acadia,Envoy,Abica and the other all

HONDA:New Accord 08th

Mazda:Mazda3,Mazda6,Mazda5,Mazda CX-7

Mercedes-Benz:B200,ML350-450,R300 and the other all

MG(Rover): MG3,MG7

MITSUBISHI:OUTLANDER,Pajero

Nissan:New Teana

Opel:Astra,Vectra,Zafira,Insignia

Peugeot:New 207,New 307

Renault:Koleos,Megane and the other all

Seat:Leon,Toledo

Skoda:Fabia,Octavia

Volkswagen:Touareg,GolfV/Golf6,Jetta,Scirocco,Tiguan,Touran,Passat CC,Eos,Caddy,Sagitar,Magotan,Passat B5/B6

As you can see,most of the Hyundai,Kia,Nissan,Toyota and Suzuki cars no need can bus.For example,the Car DVD player Hyundai Tucson,the Car DVD player Nissan,the Car DVD Player Toyota New COROLLA,and the Car DVD Player Suzuki Swift,it is simple installation without can bus.If your car is from these brands and not find the special car dvd player for your car, you can install the 2 din car dvd player with gps to your cars,the steering wheel control can work with every car which without can bus.