** Shares of auto-parts manufacturer Gentex GNTX.O rise 3.7% to $23.88 after Q1 revenue and profit beat estimates
** GNTX reports higher sales in advanced, higher-value products such as full-display mirrors and in-cabin monitoring systems
** Co says operational efficiencies improved margins, offsetting higher tariff and commodity costs
** Q1 adj. EPS of 48 cents vs consensus of 45 cents - LSEG data
** Q1 revenue of $675.4 mln vs analysts' average estimate of $648.9 mln
** As of last close, GNTX stock down 1% YTD
(Reporting by Utkarsh Hathi)
((utkarshtushar.hathi@thomsonreuters.com))