Handsfree/Carplay

How can I get apple maps on my iphone 7 to work with Handsfree (bluetooth) on my 2009 Lexus car? It worked fine until the last iphone update last week. Now my apple maps only shows an option to choose car play and NOT Handsfree on my phone. I still have a connection with voice speaker for calling on my car, but do not have the ability for speaker on my car for directions on my apple maps. How can I fix it. I refuse to buy a new car just to use car play!! I have used it several times on car rentals, so using it is not the problem. There must be a fix or way to connect to hands free for speaker on map directions. HELP!