Sept 4 (Reuters) - Somboon Advance Technology Pcl
* Cuts 2015 sales growth target to 3-5 percent on weaker auto production due to sluggish economy, Napatsorn Kitaphanich, vice president told investors during earnings presentation
* Says overall auto production could rise to 2.2-2.3 million from target of 2 million this year
* Aims to produce more parts for eco-cars as productions of eco-cars are expected to rise strongly in the next two years Further company coverage: (Reporting by Khettiya Jittapong)