The contact owns a 2010 Dodge Nitro. The contact stated that while driving at an undisclosed speed, the horn was inoperable while needed. The check engine warning light illuminated. The vehicle was taken to an independent mechanic and diagnosed with rear shocks and struts, air compressor, condenser, HVAC system, and electrical system failure. The mechanic replaced the spark plugs, engine coils, air compressor, and condenser. The manufacturer was made aware of the failure but informed the contact that they could not assist since the vehicle was purchased from a Chevrolet dealer. The failure mileage was approximately 65,000.