Mazda Cx-9 Years to AvoidThe weakest years — and the one you should buy instead
After reviewing every Mazda Cx-9 we've analyzed (19 years), these are the 3 weakest. Each one has either an absolute low reliability score, chronic repair issues, or unusually high ownership costs relative to other Cx-9 years.
Proceed with caution
2007 Mazda Cx-9
The 2007 Mazda CX-9 is a stylish and engaging three-row SUV, but its early model year comes with a few significant caveats, most notably the notorious Power Transfer Unit (PTU) on AWD models. While many owners enjoy trouble-free motoring, neglecting critical maintenance or ignoring early warning signs can lead to substantial repair bills, making a thorough pre-purchase inspection absolutely crucial.
Why this year scores low
On AWD models, the PTU is prone to premature failure due to insufficient lubrication or a flawed design, leading to gear grinding noises, fluid leaks, and eventual complete failure. This can be a very expensive repair, often requiring replacement.
The Aisin 6-speed automatic, while generally solid, can develop harsh shifting, especially between 2nd and 3rd gear, due to solenoid issues or worn valve bodies. Neglected fluid changes accelerate wear.
The internal water pump on the 3.5L V6 can fail, requiring significant labor to replace as it's driven by the timing chain. VVT (Variable Valve Timing) actuators and solenoids can also stick, causing rough idle or reduced performance.
Proceed with caution
2008 Mazda Cx-9
The 2008 Mazda CX-9 presents a compelling blend of family utility and engaging driving dynamics in the used market. While generally a robust platform, diligent attention to known issues, particularly the power steering system and potential engine components, is crucial for long-term ownership. This vehicle warrants a 'proceed with caution' approach, as neglected maintenance can lead to significant repair bills.
Why this year scores low
The power steering pump and associated hoses are prone to leaks and premature failure, leading to a loss of power assist or whining noises. This is a very common complaint.
While less prevalent than some Ford 3.5L counterparts, the 3.7L V6 can develop timing chain stretch or VVT actuator issues, leading to rough running, check engine lights, and potentially catastrophic engine damage if ignored.
The power liftgate motor and control module can fail, causing the liftgate to operate erratically or not at all. This is a common nuisance issue.
Proceed with caution
2009 Mazda Cx-9
The 2009 Mazda CX-9 offers compelling style and driving dynamics for a three-row SUV, making it an attractive family hauler. However, potential buyers MUST be aware of its specific Achilles' heels, particularly with the Power Transfer Unit (PTU) on AWD models and the water pump, which can lead to costly repairs if neglected. It's a capable vehicle that requires a diligent pre-purchase inspection and a commitment to proactive maintenance to realize its full potential.
Why this year scores low
On AWD models, the PTU is prone to premature failure due to inadequate lubrication and heat, often leaking fluid or suffering internal bearing wear. This can lead to a whining noise, vibration, or complete loss of AWD. If fluid is low, it can lead to catastrophic failure.
The water pump on the 3.7L V6 engine is located internally, driven by the timing chain, making its replacement a significant undertaking. It's known to develop leaks, which if not addressed promptly, can lead to engine overheating and severe damage. Drive belt tensioners can also seize.
While generally durable, the Aisin 6-speed automatic can experience solenoid issues leading to harsh or delayed shifts, particularly in higher mileage examples. Internal clutch wear can also occur, especially if fluid changes have been neglected or the vehicle has been used for heavy towing.