Some common problems with the Mazda Miata MX5 include AC compressor failure, battery issues and the clear coat being of poor quality, notes CarComplaints.com. Each of these problems costs anywhere from hundreds to thousands of dollars to repair, states RepairPal.com.
According to CarComplaints.com, the most common problem with the Mazda Miata MX5 is the air conditioning compressor going out. As of 2015, the average cost of this repair runs around $1,200 and problems begin at around 5,000 miles.
The second most common problem is the clear coat losing its shine. The only repair for this problem is stripping the clear coat off and reapplying. The average cost for this repair is $1,800, notes RepairPal.com.
Many Miata owners experience battery issues. The repair for this problem involves replacing the battery.
Generally, the Mazda Miata MX5 is a solid vehicle that has not had many reported problems. Some Miata owners report a noise coming from the valve lash adjusters and the check engine light coming on due to improperly manufactured threads on the fuel filler pipe. Another less common problem is a warped flywheel, which may be diagnosed when the car shudders when the vehicle is placed in reverse. Some owners also report a leaky valve cover that sends oil onto the spark plug wires.