What are the most common Mazda CX-9 problems?
According to Au7o's analysis of 4,000+ owner reports, the 2011-2011 Mazda CX-9 has 5 documented issues. The most frequently reported are: Timing Chain Stretch on 3.7L V6, Water Pump and Coolant Crossover Pipe Leak (3.7L V6), Transfer Case Fluid Leak (AWD Models). Of these, 2 are rated critical and should be addressed promptly.
Is the Mazda CX-9 reliable?
The 2011-2011 Mazda CX-9 has 5 known issues documented across 4,000+ owner reports. 2 issues are rated critical: Timing Chain Stretch on 3.7L V6 and Water Pump and Coolant Crossover Pipe Leak (3.7L V6). Prospective buyers should inspect for these issues and factor potential repair costs into their purchase decision. Regular maintenance following the manufacturer's schedule helps prevent many common problems.
How much does it cost to fix common Mazda CX-9 problems?
Repair costs for known Mazda CX-9 issues range from $150 to $3,500, depending on the specific problem and whether you choose DIY or professional repair. The most critical issue, Timing Chain Stretch on 3.7L V6, typically costs $1,500-$3,500 to repair. Au7o provides step-by-step DIY maintenance guides that can help reduce repair costs.
What is the 2007-2015 Mazda CX-9 Timing Chain Stretch on 3.7L V6?
The Ford-derived 3.7L Duratec V6 in first-generation CX-9 suffers from timing chain stretch, typically between 80,000-120,000 miles. Chain guides and tensioners wear, causing timing to retard and triggering check engine codes. If not addressed, can lead to jumped timing and sever… Repairs typically run $1,500-$3,500. Severity: high.
What is the 2007-2015 Mazda CX-9 Water Pump and Coolant Crossover Pipe Leak (3.7L V6)?
The Ford-derived 3.7L Cyclone V6 in first-gen CX-9 models has a water pump mounted in the engine V that is driven by the timing chain. The pump seal and the coolant crossover pipe gaskets are common failure points, causing coolant to leak internally or externally. Because the pum… Repairs typically run $1,500-$3,500. Severity: high.
What is the 2007-2023 Mazda CX-9 Transfer Case Fluid Leak (AWD Models)?
AWD-equipped CX-9 models develop fluid leaks from the power transfer unit (PTU) / transfer case. The output shaft seal and case halves are common leak points. Low fluid levels lead to increased wear, whining noises, and eventual transfer case failure. Fluid changes are not part o… Repairs typically run $150-$2,000. Severity: medium.
What is the 2007-2015 Mazda CX-9 Rear Differential Coupling Failure (AWD)?
AWD CX-9 models use an electronically controlled rear differential coupling to distribute torque. The coupling can overheat and fail during aggressive driving or towing, and the internal clutch pack wears over time. A failing coupling may cause AWD warning lights, vibrations duri… Repairs typically run $200-$2,000. Severity: medium.
What is the 2007-2015 Mazda CX-9 A/C Evaporator Core Leak and Refrigerant Loss?
First-generation CX-9 models are prone to A/C evaporator core leaks, causing gradual refrigerant loss and reduced cooling performance. The evaporator develops pinhole leaks from internal corrosion, often accelerated by moisture and debris in the system. Symptoms worsen in hot wea… Repairs typically run $800-$1,800. Severity: medium.
