10.0

really awful
Typical Repair Cost:
$3,380
Average Mileage:
52,600 miles
Total Complaints:
1 complaints

Most common solutions:

  1. replace cylinder head (1 reports)
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problem #1

Jun 152022

CX-9 Signature 2.5L Turbo

  • Automatic transmission
  • 52,600 miles

click to see larger images

leaking coolant from crack on cylinder head

I drove my 2016 CX-9 off the highway and it idled at front of a restaurant for about 5 minutes, when suddenly the engine coolant overheat light came on. I shut the engine off and found leaking coolant on the ground near the rear of engine bay. Brought the car to Corpus Christi Mazda, where I found out leaks come from cylinder head crack. This happens to CX-9s manufactured before June 20, 2020 according to Mazda TSB 01-013/21. I was quoted $3380 to replace the cylinder head out of pocket because the car is just out of powertrain warranty. I contacted Mazda headquarter for covering the cost out of goodwill through AWA (after warranty assistance) program since this is due to manufacture defects of cylinder head. Mazda refused to pay.

- Haibin S., Corpus Christi, TX, US