The 2007 CX-9 with its 3.7L V6 suffers from catastrophic engine failure due to piston ring land fracture and severe transmission cooler failures. These are not maintenance issues—they're design flaws that destroy drivetrains between 60k-120k miles.
Piston Ring Land Fracture / Catastrophic Engine Failure
Common · high severity
Typical onset: 60,000-120,000 mi
Symptoms: Sudden excessive oil consumption (quart every 500-1000 miles), White/blue smoke on startup or acceleration, Rough idle, misfires, loss of power, Metallic knocking sounds from cylinder head, Check engine light with misfire codes (P0300-P0306)
Fix: The cylinder 2 and 5 piston ring lands crack due to weak castings, allowing combustion pressure into crankcase. Only real fix is engine replacement or complete rebuild with aftermarket pistons. Rebuilt short block R&R takes 18-24 labor hours. Some shops try used engines (12-15 hours), but those carry same defect risk.
Symptoms: Transmission slipping, delayed engagement, or no movement, Strawberry milkshake appearance in coolant overflow, Overheating transmission and/or engine simultaneously, Pink/red ATF in coolant reservoir, Sweet smell from exhaust or coolant leak
Fix: The internal cooler inside the radiator develops pinhole leaks, allowing coolant and ATF to mix. This destroys the transmission within days. Requires radiator replacement, complete transmission flush (often too late), and frequently full transmission rebuild or replacement. Total job is 10-14 hours if trans survives, 20-28 hours for trans replacement.
Estimated cost: $3,000-7,500
Transfer Case Fluid Leak / Bearing Failure
Occasional · medium severity
Typical onset: 80,000-130,000 mi
Symptoms: Whining or grinding noise from center/rear of vehicle, Binding or jerking during tight turns on dry pavement, Fluid puddle under center of vehicle (red/brown ATF), Vibration at highway speeds, AWD warning light illuminated
Fix: Front output shaft seal leaks, starving bearings. If caught early, reseal and fluid change (3-4 hours). If bearings damaged, transfer case rebuild or replacement needed (8-12 hours). Mazda used PTU (power transfer unit) prone to inadequate lubrication.
Estimated cost: $800-3,200
Front Lower Control Arm Ball Joint Separation
Occasional · high severity
Typical onset: 90,000-140,000 mi
Symptoms: Clunking noise over bumps from front suspension, Wandering or loose steering feel, Uneven tire wear on inside edge, Vehicle pulls to one side, Visible play when prying on ball joint
Fix: Ball joints not serviceable separately—require complete control arm replacement both sides for safety. NHTSA recall 14V-353 covered some VINs, but many fall outside range. Each side takes 2-2.5 hours, always do both plus alignment (1 hour).
Estimated cost: $800-1,400
Timing Chain Tensioner / Chain Stretch
Occasional · high severity
Typical onset: 100,000-150,000 mi
Symptoms: Cold-start rattle for 2-5 seconds from engine front, Check engine light with cam/crank correlation codes (P0340-P0349), Rough idle or hesitation after cold start, Metallic rattling under acceleration, Reduced fuel economy and power
Fix: Primary and secondary chain tensioners fail, allowing chain slap and potential timing jump. Requires timing chain kit, tensioners, guides, and VVT actuators. Front cover removal, 12-16 hours labor. Critical to catch before chain jumps—that causes valve-to-piston contact.
Estimated cost: $2,200-3,800
Rear Differential Pinion Seal Leak
Occasional · low severity
Typical onset: 75,000-120,000 mi
Symptoms: Gear oil dripping from rear diff nose, Whining noise from rear on deceleration, Visible oil coating on driveshaft and diff housing, Burning oil smell after highway driving
Fix: Pinion seal hardens and leaks. If addressed promptly, seal replacement takes 3-4 hours (drop driveshaft, mark pinion, replace seal, reset preload). If differential ran low on fluid, bearings damaged—rebuild jumps to $1,800-2,800.
Estimated cost: $400-900
Owner tips
Check oil level every 500 miles religiously—early warning for piston failure
Inspect coolant reservoir weekly for pink/red contamination from trans cooler leak
Replace transmission fluid and filter every 30k miles (Mazda says 'lifetime' but that's before failure)
Budget $1,000/year minimum for catastrophic repair reserve if buying used
Consider aftermarket extended warranty that specifically covers engine/transmission internal failures
Hard pass unless already had engine replaced with upgraded pistons and external trans cooler added—the core defects are too expensive and too common to gamble on.
AI-assisted summary drawn from NHTSA recall data, our labor-times database, and platform knowledge. Not a substitute for a pre-purchase inspection on a specific vehicle.
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AIR BAGS:FRONTAL:PASSENGER SIDE:INFLATOR MODULE · 19V782000
2019-10-31 · EA15001
Mazda North American Operations (Mazda) is recalling certain 2007-2012 CX-7, CX-9, and 2009-2012 Maza6 vehicles. These vehicles had their passenger frontal air bag inflators previously replaced under a prior recall using inflators of the same design. The inflators may explode due to propellant degradation occurring after long-term exposure to high absolute humidity, temperature and temperature cycling.
Consequence: An inflator explosion may result in sharp metal fragments striking the driver or other occupants resulting in serious injury or death.
Remedy: Owners are advised not to drive their vehicles until the repair has been performed. Mazda will notify owners, and dealers will replace the front passenger air bag inflator with an alternate one, free of charge. The recall began December 3, 2019. Owners may contact Mazda customer service at 1-800-222-5500, option 4. Mazda's number for this recall is 1317F. Note: This recall supersedes recalls 16V356 and 17V012.
AIR BAGS:FRONTAL:PASSENGER SIDE:INFLATOR MODULE · 17V457000
2017-07-18 · EA15001
Mazda North America Operations (Mazda) is recalling certain 2012 CX-7, CX-9 and Mazda6 vehicles sold, or ever registered, in the states of Alabama, California, Florida, Georgia, Hawaii, Louisiana, Mississippi, South Carolina, Texas, Puerto Rico, American Samoa, Guam, the Northern Mariana Islands (Saipan), and the U.S. Virgin Islands, or "Zone A."
Additionally, unless included in "Zone A" above, Mazda is recalling certain 2009 CX-7, CX-9 and Mazda6 vehicles sold, or ever registered in the states of Arizona, Arkansas, Delaware, District of Columbia, Illinois, Indiana, Kansas, Kentucky, Maryland, Missouri, Nebraska, Nevada, New Jersey, New Mexico, North Carolina, Ohio, Oklahoma, Pennsylvania, Tennessee, Virginia, and West Virginia, or "Zone B."
Additionally, unless included in "Zone A" or "Zone B" above, Mazda is recalling certain 2007-2008 CX-7 and CX-9 sold, or ever registered in the states of Alaska, Colorado, Connecticut, Idaho, Iowa, Maine, Massachusetts, Michigan, Minnesota, Montana, New Hampshire, New York, North Dakota, Oregon, Rhode Island, South Dakota, Utah, Vermont, Washington, Wisconsin, and Wyoming.
These vehicles are equipped with certain air bag inflators assembled as part of the passenger frontal air bag modules used as original equipment or replacement equipment. In the event of a crash necessitating deployment of the passenger frontal air bag, these inflators may rupture due to propellant degradation occurring after long-term exposure to absolute humidity and temperature cycling.
Consequence: An inflator rupture may result in metal fragments striking the vehicle occupants resulting in serious injury or death.
Remedy: Owners are advised not to drive their vehicles until the remedy is performed. Mazda will notify owners, and dealers will replace the front passenger side air bag inflator with an alternate inflator, free of charge. The recall began October 4, 2017. Owners may contact Mazda customer service at 1-800-222-5500. Mazda's number for this recall is 1317F. Note: This recall supersedes recall 17V-012.
AIR BAGS:FRONTAL:PASSENGER SIDE:INFLATOR MODULE · 17V429000
2017-06-29 · EA15001
Mazda North America Operations (Mazda) is recalling certain 2009-2011 Mazda6, and 2007-2011 CX-7 and CX-9 vehicles. These vehicles are equipped with certain air bag inflators assembled as part of the passenger frontal air bag modules, and used as original equipment or replacement equipment. In the event of a crash necessitating deployment of the front air bags, these inflators may rupture due to propellant degradation occurring after long-term exposure to absolute humidity and temperature cycling.
Consequence: An inflator rupture may result in metal fragments striking the vehicle occupants resulting in serious injury or death.
Remedy: Owners are advised not to drive their vehicles until the remedy is performed. Mazda will notify owners, and dealers will replace the passenger frontal air bag inflator with an alternate inflator, free of charge. The recall began on August 30, 2017. Owners may contact Mazda customer service at 1-800-222-5500. Mazda's number for this recall is 1317F. Note: This recall supersedes recall 16V356 and all vehicles that were not remedied under that campaign are now covered by this one.
Mazda North American Operations (Mazda) is recalling certain model year 2007-2014 CX-9 vehicles manufactured October 24, 2006, to December 28, 2013. The affected vehicles have front suspension ball joints that may corrode from water leaking into the fitting.
Consequence: Over time, the ball joint corrosion may result in the front lower control arm separating from the ball joint, causing a loss of steering control and increasing the risk of a crash.
Remedy: Mazda will notify owners, and dealers will replace both the left and right lower control arms, free of charge. The recall began on September 14, 2015. The recall will begin with model year 2007-2009 vehicles registered in Connecticut, Delaware, Illinois, Indiana, Iowa, Kentucky, Maine, Maryland, Massachusetts, Michigan, Minnesota, Missouri, New Hampshire, New Jersey, New York, Ohio, Pennsylvania, Rhode Island, Vermont, Virginia, Washington D.C., West Virginia, and Wisconsin. The second phase will be for model year 2010-2014 vehicles in the same states. Finally, all remaining vehicles will be remedied. Owners may contact Mazda customer service at 1-800-222-5500. Mazda's number for this recall is 8515G.
EQUIPMENT · 09E011000
2009-04-02
THULE, INC. IS RECALLING 2,323 OWNER-INSTALLED ROOF-MOUNTED FIT KITS, MODELS 3068 AND 3069, MANUFACTURED BETWEEN JANUARY 1, 2008 AND FEBRUARY 28, 2009 THAT ARE USED WITH THULE PODIUM FOOT PACKS, MODELS 460 AND 460R. THESE FIT KITS WERE SOLD AS AFTERMARKET EQUIPMENT FOR USE ON THE VEHICLES LISTED ABOVE. THE BOLT(S) USED TO SECURE THE FOOT TO THE VEHICLE WAS MANUFACTURED TO A HARDNESS THAT MAY CAUSE THE BOLT(S) TO BE BRITTLE AND POTENTIALLY BREAK UNDER STRESS.
Consequence: THIS MAY RESULT IN THE BOLT(S) SNAPPING OFF DURING USE OR WITHOUT A LOAD. THE UNSECURED RACK AND LOAD CAN THEN COME LOOSE WHILE DRIVING CREATING A POTENTIAL ROAD HAZARD, POSSIBLY RESULTING IN A VEHICLE CRASH.
Remedy: THULE WILL MAIL A RETRO FIT KIT ALONG WITH REPAIR INSTRUCTIONS TO OWNERS FREE OF CHARGE. THE SAFETY RECALL IS EXPECTED TO BEGIN ON OR BEFORE APRIL 13, 2009. OWNERS MAY CONTACT THULE TOLL-FREE AT 1-800-238-2388.
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