The radio issue is easily fixable with a replacement unit from wrecking yard - in my case $85 (Canadian). Make sure you get the Parts Number of original Head Unit, and to determine whether it has Voice Activation/Sirius XM Satellite etc. There are 20 different variants for Fiestas 2010-2018.
Overall, the car is a very good car. My (2015) is reasonable fit & finish given that the assembly was done in Turkey, and the 3-cylinder 1.0 litre engine with Eco-Boost turbo was built in Cologne, Germany. 5 speed manual is mated to a tall 5th gear for Interstate speed fuel efficiency - in the US, on RON-89 gas, with semi-frequent Lucas Injector lubricant, I get 51-52 mpg at 105-110kph (65-67 mph). Handles decent in Canadian snow. Put 105,000 miles on it in 2-years travelling the southern US and western Canada. 25,000. No major parts yet - synthetic 5W-20 oil/filter, Air Filter every 25,000 miles in dusty Arizona, front bakes discs, pads at 150,000 miles. Two front low-beam halogen light bulbs, and one rear brake light - nice design in that I screw and a catch release, and the entire lamp sense unit pulls out where you can then change bulbs with lamp unit on your knee.
Complete Prestone coolant flush at 100,000 miles as the 3-cylinder has some Ford Cosworth F-1 tech involved - head and block cooled at separate flow rates, head at 21-PSI including liquid-cooled exhaust header. There are 2 water pumps and 2 thermostats to do this. Overall, runs about 90-F hotter than regular 4-cylinder 1.6 engine without turbo, and the small bore turbo spools at 25,000rpm - so coolant is important in this model, and should be fresh every couple of years. Am presently at 240,000 miles and have done front brakes twice, and on original rear drum shoes. Struts and shocks still original on this 2015 model. Every powered driver feature still works properly - P/windows/mirrors, colour select interior lights, brake assist/Hillside assist, ECM full traction control, all digital distance and fuel use metrics, emergency brake cable still tight, 12-V outlets, USB, headphone jack, and GPS compass direction all still work well. Since end of warranty 60,000m/100,000kilometers, the emissions purge vent valve smaller black box under rear trunk has filled somewhat and after refuelling, the vapours of gas are collected in this box but mine is full and when you start ignition, the car sounds as if it won't start - put foot to floor and it will then gain ignition and start because its non-mechanical truly Electronic Direct Injection like a VW Golf diesel. The 1.0-litre option over the 4-banger 1.6 without turbo was $1,100 Canadian. Superb fuel consumption (except it is temperature sensitive, and below 20-F I block front grille with air blanket as small displacement takes awhile to produce good heat). The 1-litre 3-cylinder has way more torque and horsepower than the 1.6-litre 4-cylinder, and is far more fun to drive with a 5-speed manual stick - particularly the coastal mountainous, California Pacific Highway CPH-1. In my case, the only and last Ford product in the family was in an intersection smash up in 1978 - went 40 years driving Japanes and German - then "Have You Driven A FORD lately" came over me when I read about this Euro tech engine design. Really like the car, and mine was purchased used at 101,000-km just off warranty for $6,700 cash. Original price in Canada was $18,400. Great little car. Been Toronto-Miami-Texas-California and back, twice, and many times to Texas and south Florida.