There is A lot more to the story than what I posted.
The reason for the Electronic control valve was to regulate engine operating temperatures more tightly than possible with a mechanical thermostat. This allowed higher compression ratios, lower emissions, more power and better MPG.
According to available information, the first reported recall on a Mazda CX-5 related to the coolant control valve was likely issued for model years 2014-2016, with the issue being a potential malfunction in the failsafe thermostat within the coolant control valve, which could lead to unintended opening at lower temperatures causing engine temperature concerns; this recall was addressed by replacing the coolant control valve with a modified version.
So I must ask, how many iterations and years does it require to FIX the problem?
Their design was flawed as were their attempts at "fixes".
my wife's vehicle had 7800 miles on it, about 1 year old and they said to drive it. I am not comfortable nor was she driving a vehicle around with the CHECK ENGINE Light on ALL the time.
What happens when another problem like a loss of oil pressure? DRIVE IT
. Not gonna happen nor will I subject her to that.
I went so far as to try to trade it in and an identical CX-5. They offered 12K saying they did not want it sitting on the back lot until parts became available.
Parts are available to build and sell new cars, why are they not available for the ones you've already sold???
If it is safe to drive then put it in your loaner fleet. Response, We can't have customer driving a loaner with the check engine light on..
EXCUSE ME! But WTH am I?
This coolant control valve problem of yours must be considered as non-critical problem by Mazda, or Mazda didn’t have any good solution at the time. Mazda eventually did a right thing with a long warranty extension, and came up a much cheaper thermostat kit only to fix the problem.
I'll disagree as a motor running cold uses more fuel, emits more emissions, can lead to carbon build up in the combustion chambers, fouled emissions components, diluted oil & premature engine wear as a start.
How long has this "FIX" been tested? Likely as long as the previous attempts.
Also, it remains to be seen just how far Mazda will go if and when the above issues surface. Based on this example I would not trust them to stand behind much. I see their Extension as nothing more than what bulls leave behind them.
One of MANY examples
I need help on what to decide
My CX-5 2019 GTR has a cracked cylinder, in reference to TSB 01-013-21. It is out of warranty at this point with only 67k miles and the dealership is asking for $6k to fix, but with goodwill they only can offer about $4,800 to fix.
Has anyone gotten Mazda to fully cover the expense for this TSB? Any solutions to getting them to take responsibility to fully cover?
At this point should I just trade it in or get the engine fix and traded it in afterwards?
Thanks.
Not surprised that Mazda didn’t do the right thing on customer satisfactory category.
Again we differ as I was. It took HOURS on hold (literally) to reach their customer service people. One actually said she would hang up if II didn't like what she was saying. Not one of them I reached seemed to care. Worse than Peg Bundy with a new box of chocolates and a new soap opera. If you were disconnected, Sorry, start over.
Firstly, the thermostat inside the coolant control valve isn’t an “electric thermostat”, but a traditional mechanical thermostat with different size. Not sure why Mazda would fail to manufacture a good old thermostat properly, as those related TSBs since 4/22/2021 keep saying: “To eliminate this concern, the production process of the coolant control valve has been modified”, but the coolant control valve problem seems to be persistent.
By comparison, the newly added “electric thermostat” (not to be confused with Mazda’s “coolant control valve” although they both can have much more precise coolant flow control for different engine temperature) on Toyota’s Dynamic Force high-compression 2.5L / 2.0L NA found on my daughter’s 2022 Corolla Hatchback XSE doesn’t seem to have any issues since 2018!
I apologize for my iniquitous error on the terminology used "electric thermostat". I'll take 50 lashes with a ford serpentine belt.
Persistent was a blatant euphemism and another attempt to bring the bull around again.
By comparison, the newly added “electric thermostat” (not to be confused with Mazda’s “coolant control valve” although they both can have much more precise coolant flow control for different engine temperature) on Toyota’s Dynamic Force high-compression 2.5L / 2.0L NA found on my daughter’s 2022 Corolla Hatchback XSE doesn’t seem to have any issues since 2018!
My point exactly on the Toyota
You must missed many scandals happened from many major car manufactures in Japan recently. Their car industry is having problems IMO.
I'm guessing so
Back in 2018 I was planning to get a new 2018 CX-5 but immediately dropped the plan once I learned Mazda had added cylinder deactivation to a reliable 2.5L NA. Why Mazda spent that much effort and money to a feature which is historically having the bad reputation of failure, and gained 0 ~ 1 EPA fuel consumption ratings on an already efficient 4-cylinder engine? Looking back, almost EVERY component Mazda modified to accommodate cylindef deactivation has problems! Rocker arms / switchable hydraulic lift adjusters、cylinder head、transmission / torque converter、now the coolant control valve. In addition to bad decision making, it’s an indication of lack of good design on quality when Mazda engineers are redesigning something or doing the modification on parts. IMO Mazda’s R&D department seems to have some major problems in recent years.
I'll agree and say that I've noted this with a few other offerings from Japan. The total lack of response or caring was shocking to me. As previously mentioned I have worked with and for Japanese companies in technical/ engineering capacities. This behavior would not have been acceptable or tolerated.
I am beginning to believe the root cause is the current generation has not suffered the hardships of their predecessors. Much like the 2nd generation of WWII Americans that led us into the late 70's early 80's when the quality of American goods tanked. We becamae complacent and lazy. Japan was ready. History may just be about to repeat itself. Who will it be? China appears to be a front runner but there are others
The saddest part is MAZDA WAS our go to for many years. I would buy 2 new 83-85 626's if possible. That was my all time favorite newly purchased car, and I have owned MANY new cars.
SAD
I thought when I was researching this, the issue surfaced on other models earlier but I may be mistaken as that was a while back.
