2016 Infiniti QX50 ELECTRICAL SYSTEM,UNKNOWN OR OTHER

Purchased vehicle on 4/23/23 from Carmax. Discovered horn was not working 5/10 when a truck swerved into my lane on the freeway. Carmax refused to refund money under 30 day guarantee stating I drove over 1500 miles. Prior to purchasing I signed documents stating the car was in perfect condition after 3 point inspection , horn included . They scheduled a appointment at the end of the month leaving me with no transportation to get to work . After complaining to the BBB they denied anything was wrong with the car, even after doing a appraisal on 6/10 where I stated the horn was not functioning. I took the car for a third party diagnostic and the mechanic determined a defective horn relay and spiral cable . I have not driven this car at all since 5/13 except 6/10 when I attempted to sell it back to the dealership twice.

The Display / Navigation screen does not always light up. Some time it works when you start the car. Other times it tries for a awhile be fore it starts to work. When it lights up everything from what I can tell works normally. When it does not light up. The AC works by its self, but you can not turn it off or adjust it. The warning sensors work, but Camera does not work. Radio does not work. Because we do not live close to an Infiniti dealer. I took it to a North Strand Nissan dealer 2592 Highway 9 Little River, SC 29566 phone 843-390-7777. They performed a diagnosis and found internal failure in the system. They told us they would need to start with replacing radio unit and then check further at a cost of $6,500. Yet when they moved the car outside to park it everything worked for them. And when we picked up the car everything work until we turned it off. We just drove it 10 hours on a trip. Sometimes it worked when starting up the car. Other times it took an hour or so for it to work. The safety problems is when the screen flashes trying to start at night. It is distracting. Also backup camera does not work if the screen does not light up. Car has 39,000 miles on it Thanks