Installers of audio, security and communications will be able to get an ATA as a result of the Mobile Electronics and Security Federation (MESF) presenting its case for accreditation to the IMI.
The MESF presented evidence of market size, worker numbers and complexity of work before development of the ATA could begin.
Jeff Marshall, general secretary of MESF, said: "Our industry sector has for too long been the poor relation of the motor industry.
"As independent retailers and installers we have suffered from the negative attitude of manufacturers and their dealer networks to equipment not included as standard on their vehicles."
Marshall said that by having accreditation for installers through the IMI’s ATA, vehicle owners will "have the confidence to use the independent aftermarket and ignore any more negative statements from manufacturers and dealer networks".