"CMS Phase I Upgrade". Abstrakti: The CMS experiment will undergo its first major hardware upgrade, named as Phase I, during the shut-down period (LS1). The innermost measurement unit of the CMS, the silicon pixel detector will be completely rebuild and accompanied with new readout electronics and cooling system capable to handle essentially higher amount of data foreseen after LS1. The number of channels, i.e pixels and related interconnections, will simultaneously be increased from current 64 million up to 125 million channels allowing significantly better tracking performance. The HIP CMS Upgrade project is involved in Phase I by production, including quality assurance, of notable fraction of pixel sensor modules to be installed into upgraded detector. The on-going activity is carried out in cooperation with Finnish industry