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    2023 CX-9 Doors can’t unlock…Anyone else?

    There is also an unlock button on the liftgate to the right of the button to open the liftgate. In the cold the rubber of the button hardens. It may take a determined push to get it to actuate.
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    Poll 2.5T Coolant Leak/Engine Replacement

    Maybe. If the coolant loss caused excessive overheating the head gasket may have failed, allowed coolant into the engine oil, and the engine is now junk. Is it time to make a BIG lemon symbol, mount it on the roof of your car, and park in a legal parking spot in front of the dealership? Stick...
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    2016 CX-9 Battery replacement -- need to register?

    It's hard to make a good photo of a properly filled battery cell. The new battery should have been correctly filled with dilute sulfuric acid electrolyte before it is sold. After that the water does vaporize slowly out of the dilute acid and needs to be replenished with distilled or...
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    2016 CX-9 Battery replacement -- need to register?

    If you get to pick your battery, look at the date code. That is a sticker with four digits, the month and year of manufacture. Get the freshest battery in the rack. Look for the right size battery, group 35, with the highest CCA cold cranking amps. It'll cost a little more and it'll last...
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    2021 CX-9 Burning oil

    It took more than 8000 miles without an oil change to destroy this engine, but without oil changes this always happens. No warranty nor extended warranty nor manufacturer goodwill will repair this. Change the oil every 7,500 miles with top quality oil (it doesn't need to be synthetic) and...
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    2.5T Cracked Cylinder Head/Leaking Coolant Report to the NHTSA

    These expensive high priced products are not warranties. Federal warranty law gives the consumer a lot of protection. These so-called "extended warranties" are not warranties under law. They are prepaid repair contracts. (If you're lucky) they cover what is listed in the contract fine print...
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    Active Driving Display question (2021 CX-9)

    --5W-30, any type, latest spec, currently API Service Category SP, ILSAC GF-6/A. 7,500 mile oil drain interval. Many of us choose to use full synthetic motor oil, but that's not required. --I've never seen a filter type or spec listed. At your favorite supplier get the filter listed in their...
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    2016~2023 CX-9 Plugged heater core - TSB - 07-007/19

    A change of the antifreeze/coolant more frequently will help keep things clean. A complete change is not necessary if the system hasn't been contaminated. Drain a gallon and add a gallon of fresh every couple of years will keep the additives active. How about a coolant filter on the inlet to...
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    Active Driving Display question (2021 CX-9)

    This is the speed limit as programmed into the nav system...looks like a speed limit sign, at least it is on my older CX-9.
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    Guide 2016~2021 CX-9 DIY Transfer Case + Rear Differential Fluid Drain and Fill

    Rule #1 for draining any gear box....loosen the fill plug before your remove the drain plug. If the fill plug is stuck and you can't get the fill plug out, don't drain the oil out. Red Line 75W85 is my choice of gear oil for these jobs. I use the recommended amounts. The plugs need good...
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    Bad smell from air vents

    I haven't done the treatment, but I'd set the controls for outside air intake, the fan speed on high, and look and listen and feel for a place near the base of the wipers where the air is being pulled in. Then follow the directions. Or maybe set the air intake to recirculate, fan on high, and...
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    2009 CX-9 Intermittent starting problems - Do dealers/shops have machines to diagnose?

    Try to get a video of this. Show that to the dealership service writer when you take it in. You really want to avoid the technician saying, "could not duplicate."
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    2010 CX-9 Water pump failure?

    For $35 you can get the oil analyzed for coolant in the oil as well as wear metals and other possible red flags. Then you'll know the engine condition. https://www.blackstone-labs.com/tests/standard-analysis/ Many other places offer oil analysis. Check with any local truck stop or truck repair...
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    Speedometer Calibration? 2020 CX-9

    Larger diameter tires will be a bit like driving in a higher gear. The drivetrain will turn a bit more slowly, thus whatever picks up the drivetrain speed and translates that to the speedometer will read a bit low at the same actual speed.
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    2010 CX-9 - New brake booster and now brakes feel squishier than before?

    Do these systems have a brake bleed fitting at the master cylinder as well as at each wheel? All must be bled, and in the correct sequence, usually starting with the brake farthest from the master cylinder and working in sequence to the one closest to the master cylinder. Does the brake pedal...
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    2007~2015 Mazda CX-9 water pump replacement/service expected costs?

    Some parts wear by the mile. Other items deteriorate by time. Coolant, brake fluid, rubber parts are mainly time based, although rubber timing belts have both mileage and time limits. In my vehicles with timing belts I've followed the mileage; none have been in place long enough to meet the...
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