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NHTSA-Verified · Common Problems

2018 Mazda Cx 9
Common Problems

Ranked from 58 federal NHTSA complaints and 2 recalls. Every problem links to the complaint IDs behind it.

2
Safety
2
High severity
3
Medium
2 problems on this vehicle involve a crash, fire, or injury risk. If you are experiencing one, stop driving and have it inspected.

7 Common Problems

Ordered by how often owners reported each one to NHTSA. The bar shows how common a problem is relative to the most-reported on this vehicle. Expand any problem to see the federal complaint IDs.

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  1. 1

    Engine coolant leak due to cracked cylinder head

    36complaints
    High severityEngine

    The engine coolant leaks due to a cracked cylinder head, leading to engine overheating and potential catastrophic failure.

    $150–$1,200est. cooling-system diagnosis + repair · 1–6 hrs labor
    Get local quotes
  2. 2

    Overheating and engine failure due to coolant leak

    20complaints
    High severityEngine

    The engine overheats and fails due to a coolant leak, often resulting in catastrophic engine damage and vehicle becoming undriveable.

    $4,000–$8,000est. engine replacement · 12–20 hrs labor
    Get local quotes
  3. 3

    Infotainment screen cracking and malfunction

    12complaints
    Medium severityElectrical

    The infotainment screen develops spider-web or frost-like cracks, obstructing the view of important information such as navigation and climate controls.

    $200–$1,500est. infotainment unit service · 0.5–3 hrs labor
    Get local quotes

    Related recall: 19V403000

  4. 4

    Brake system malfunction leading to unintended braking

    4complaints
    Safety riskBrakes

    The brake system malfunctions, causing the car to brake unexpectedly without driver input, posing a safety risk.

    $150–$1,000est. brake system diagnosis + repair · 1–4 hrs labor
    Get local quotes
  5. 5

    Passenger seat heater malfunction leading to fire

    4complaints
    Safety riskElectrical

    The passenger seat heater malfunctions and catches fire, posing a safety risk to passengers.

    Related recall: 19V403000

  6. 6

    Engine Stall at Idle Due to Stop-Start System Failure

    2complaints
    Medium severityEngine

    The engine stalls at idle when the vehicle is in a stationary position, often requiring the driver to hold the start/stop button for extended periods.

    $150–$900est. stop-start system diagnosis · 1–4 hrs labor
    Get local quotes
  7. 7

    Fuel Pump Failure Causing Engine Stalling

    2complaints
    Medium severityFuel system

    When the vehicle is low on fuel and under heavy acceleration, the fuel pump temporarily fails, causing the engine to stall.

    $500–$1,100est. fuel pump replacement · 2–5 hrs labor
    Get local quotes

    Related recall: 21V875000

Other years & sources

2010 Mazda Cx 9All NHTSA complaints for this vehicle →

Data source: U.S. National Highway Traffic Safety Administration (NHTSA) owner complaints and recalls. Problems are clustered and ranked from the complaint record; occurrence counts reflect corroborating complaints, not total incidence. Vehicle image is illustrative. Repair-cost figures are typical U.S. independent-shop ranges (parts + labor) for the class of repair shown — actual quotes vary by region, engine, and diagnosis; always confirm with a local shop.