2007 Mazda CX-9
2007 Mazda CX-9
Overview
The 2007 Mazda CX-9, a mid-size crossover SUV, was introduced with a focus on providing a comfortable ride and versatile interior space. It primarily came equipped with a robust 3.5L V6 engine paired with a 6-speed automatic transmission, designed to offer a balance of performance and refinement for family-oriented use. While generally considered a reliable vehicle for its era, like any automotive model, it has specific areas where owners have reported issues. This analysis focuses on documented technical reliability concerns beyond routine maintenance, providing insights into common problems and their potential resolutions.
Engine
3.5L V6 (2007-2008)
Variable Intake Manifold Runner Failure
- Symptoms: Check Engine Light, rough idle, loss of power, P2004/P2005/P2006 codes.
- Solution: Replacement of the intake manifold assembly or repair of the runner actuator.
- Cost: $400 - $800
PCV Valve Clogging
- Symptoms: Rough idle, increased oil consumption, potential for sludge buildup.
- Solution: Replacement of the PCV valve.
- Cost: $100 - $250
Transmission
6-Speed Automatic (FWD/AWD)
Transmission Fluid Leaks
- Symptoms: Leaking fluid, slipping gears, harsh shifting, potential overheating.
- Solution: Inspection and repair of seals, lines, or transmission cooler.
- Cost: $300 - $700
Solenoid Issues
- Symptoms: Erratic shifting, delayed engagement, transmission warning light.
- Solution: Replacement of faulty shift solenoids.
- Cost: $500 - $1000
Suspension
Standard Chassis
Strut Mount Bearing Failure
- Symptoms: Clunking or popping noises when turning the steering wheel, especially at low speeds.
- Solution: Replacement of the strut mounts.
- Cost: $300 - $600
Electrical
Body Control Module (BCM)
Intermittent Electrical Gremlins
- Symptoms: Malfunctioning power windows, door locks, interior lights, or dashboard warning lights appearing randomly.
- Solution: Diagnosis and potential reprogramming or replacement of the BCM.
- Cost: $600 - $1200
Alternator
Premature Failure
- Symptoms: Dimming headlights, battery warning light, difficulty starting, dead battery.
- Solution: Replacement of the alternator.
- Cost: $400 - $700
Exterior
Body Panels & Seals
No Major Issues
- Symptoms: No widespread issues reported.
- Solution: No widespread issues reported.
- Cost: N/A
Interior
Infotainment & Controls
No Major Issues
- Symptoms: No widespread issues reported.
- Solution: No widespread issues reported.
- Cost: N/A
Summary Verdict
The 2007 Mazda CX-9 is a generally dependable SUV, with its V6 engine and automatic transmission proving to be a solid powertrain. The most commonly cited issues revolve around the engine’s variable intake manifold and PCV system, as well as potential transmission fluid leaks or solenoid problems. Electrical gremlins related to the BCM and premature alternator failure are also points to consider. Suspension components like strut mounts can wear out, leading to noise. However, exterior and interior components are typically robust. Regular maintenance and addressing these specific potential issues proactively can contribute to the long-term reliability of the CX-9.