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Email Mazda customer care, but additionally send a pm on their Facebook page advising emails have been sent, they will respond. They listen are sympathetic etc and will refer you do a dealership. Hopefully not like my local one where there was a firewall of their charges (despite referral by Mazda and the fact is under warranty). The more attention drawn to this the better the impact.
This is my reply of Mazda.

Modern vehicles, by which we mean the latest generation of cars featuring mild hybrid systems etc, are heavily dependent upon the health of the battery.
With regard to the warning light warning “Low Battery Risk Start Vehicle to Charge the 12V Battery,‘’ this is a feature to ensure the vehicles 12V battery doesn’t deplete its charge without the customer being aware and helps ensure the battery condition is always optimised. It is not indicative of a fault meaning it can’t be driven, in fact, the opposite: it helps prevent non-start situations from a flat battery and optimising the reliability of customers car, its there to help.
The message is programmed to only show after the vehicles electrical systems (audio, navigation, locking systems, e-Brake etc) have been woken up for a period of 30 minutes whilst the ignition/accessory position is in a ‘switched-off position’. It could also be activated if the key is in close proximity to the car for an extended period of time (for example, washing the vehicle). A counter records a collective timing exceeding 30 minutes before the warning message is displayed. If the warning appears, starting and running (not necessarily driving) the vehicle for 5 minutes will reset the timer.
The factory, however, have taken customer feedback on-board that this warning is an annoyance rather than being a preventative measure and therefore have considered extending the 30 minute counter to the longest possible period. This is an enhancement and just extending the time that the warning will appear when the battery really needs input rather than the current 30 minute warning. At this moment in time we do not have a software release date.
The car however is currently operating as designed thus there is no manufacturing defect.
Yours sincerely

Reece Hollett
Customer Relations Manager
Customer Service Division
 
This is my reply of Mazda.

Modern vehicles, by which we mean the latest generation of cars featuring mild hybrid systems etc, are heavily dependent upon the health of the battery.
With regard to the warning light warning “Low Battery Risk Start Vehicle to Charge the 12V Battery,‘’ this is a feature to ensure the vehicles 12V battery doesn’t deplete its charge without the customer being aware and helps ensure the battery condition is always optimised. It is not indicative of a fault meaning it can’t be driven, in fact, the opposite: it helps prevent non-start situations from a flat battery and optimising the reliability of customers car, its there to help.
The message is programmed to only show after the vehicles electrical systems (audio, navigation, locking systems, e-Brake etc) have been woken up for a period of 30 minutes whilst the ignition/accessory position is in a ‘switched-off position’. It could also be activated if the key is in close proximity to the car for an extended period of time (for example, washing the vehicle). A counter records a collective timing exceeding 30 minutes before the warning message is displayed. If the warning appears, starting and running (not necessarily driving) the vehicle for 5 minutes will reset the timer.
The factory, however, have taken customer feedback on-board that this warning is an annoyance rather than being a preventative measure and therefore have considered extending the 30 minute counter to the longest possible period. This is an enhancement and just extending the time that the warning will appear when the battery really needs input rather than the current 30 minute warning. At this moment in time we do not have a software release date.
The car however is currently operating as designed thus there is no manufacturing defect.
Yours sincerely

Reece Hollett
Customer Relations Manager
Customer Service Division
Reading the above it is clear there is a warning that would appear in the binnacle which I have never seen on my car. I’ve seen screenshots of this warning in several forums, my car prefers not to pre-warn me, just surprises me with a flat battery situation. I suspect that facility was added on later models and if so tells me this was a recognised issue, they wouldn’t have added it otherwise. I wonder if can be retrospectively added, bet not!
 
Mine is a 2020 model so has a different control module but similar system problems - already had the battery replaced under warranty as it deep discharged whilst I was installing a dash-cam - doors open and fob in pocket - NOTHING turned on or connected to the car in any way.

What a ludicrously stupid, unreliable and unworkable system.

I now know that anytime I need the doors/hatch open for a while, for whatever reason, I connect a smart charger to the battery to avoid any problems.

Obviously this is fine when the car is at home on my drive but not really any good when you're wanting to sit near the beach with the sea air drifting through and then find you can't start the car!

Just as well I bought a booster starter pack some while ago for a different vehicle BUT guess where it lives now?

Mazda's reply above is total BS - you don't actually HAVE to have ANYTHING turned on to totally deplete the battery - just leave a door or two open - the interior lights time out BUT there is still a lot of battery drain going on.
 
My daughter's new 2021 has done this (battery warning) thing since the first week she had it. The dealer told us not to worry about it but now that it's coming up on 2 years old (in August) I plan on documenting it again.

I totally dislike the whole remote key fob thing.....since you have to have the key on you...why not just stick it in the ignition so you know where it is.
 
Hi owners, just be aware that any software updates are done from Mazda Japan via MDARS software that your Dealer uses on your car.

MAZDA Motors Europe or UK or Mazda Australia or MNAO never knows of any updates until they recieve the Bulletin or workaround from Japan, The Mazda Dealer knows even less as they rely on Distributors to inform them the Dealer via said TSB.
Distributors and Dealers do not write computer code to rectify problems, all MDARS updates come out of and directly from MC Japan.

While it may be an inconvenience most issues gets resolved completely (in time). Always, Always make sure your Mazda Dealer records your issues no matter what they are on your Repair Order before you sign cars Repair Order. That way records prove of your problem.

Plus also remember Never to a Dealer use hearsay or you read here in this forum to report a problem with your car or you heard of a computer update as most will not act on it.
Mazda Japan and Distributors expect you the owner to directly tell Dealer what your problem actually is in your words, the Dealer reports the Cause once he has fixed issue.
 
Hello Fellow Members...today I brought my CX 30 GT A.W.D. or I believe Premium in the U.S.A for service as Requested by Mazda Canada.. Not Customer Service.
If you have been following my Adventures to the dealership and Customer Service this is the Latest.
M.C. gave a list of what they wanted checked...and I asked if all checked out and was told that it did whatever it all was. Software were up to date.
I asked Service Advisor if I would get a copy from them for my record when they get a reply and told no...but he says it didn't mean that they won't ask them to do other checks.

I'll say it again....all of you please go to your dealership with this matter. Start the Process. Don't just call In.
Then phone Customer Service...this will start your file.

They have had phone calls Only at this time...and I am the only one so far that is looking into this.

Doing this and that.. under your hoods... with battery and chargers and what nots might come back and haunt you and might just cancel your warranty.....on those parts and more.
Yes it is frustrating...to have to do that and keep Records but what's the alternative(s).
Can you imagine the costs of bringing your cars in after the warranty.
Your Cars are under Warranty at this time so bringing it in and getting them to check it out.

We need to push this Worldwide....Don't kid yourselves they can fix this..we are their guinea pigs. Engineers have created this mess we sure as heck don't need this and put up with it...we bought in good faith..$$$$$
Living on this side of the Pond we need each other to push together...So please North America let's do it.

I am 70 +++ from Canada and decided to treat myself...love that vehicle and driving it is a pleasure but surely did not need this of stress...like all of you.
Sincerely,
Susan
 
I took my daughters new 2021 CX-30 back to the dealer about 2 weeks after purchasing it for this issue and was basically blown off. It's coming off warranty in August and I plan on following your advice Susan (going back to the dealer and then contacting Mazda NA to start a file. It's ridiculous that I can't vacuum her car for a few minutes without this 'low battery warning' coming on. Mazda should recall affected vehicles and FIX this PROBLEM.
 
I took my daughters new 2021 CX-30 back to the dealer about 2 weeks after purchasing it for this issue and was basically blown off. It's coming off warranty in August and I plan on following your advice Susan (going back to the dealer and then contacting Mazda NA to start a file. It's ridiculous that I can't vacuum her car for a few minutes without this 'low battery warning' coming on. Mazda should recall affected vehicles and FIX this PROBLEM.
There was a software update for this issue. Basically, control software of the BCM has been modified to change the condition for the power saving mode to be activated and deactivated.

- Activation of the power saving mode
The accumulated time 30 minutes has been extended to 90 minutes.

- Deactivation of the power saving mode
Driving or engine running for 5 minutes has been shortened to 3 seconds.

It is all described in SA-002-22, which I have attached. If you want it to be done you need to contact your dealer and ask them for this software update. This is not a recall and is only applied to customers, who want to have it. The reason being that it only increases the timer and the danger of running battery flat still exists. I had this update installed on my car and since then never had any annoying battery warnings. However, I regularly test my battery and top it up with intelligent charger, when required.
 

Attachments

I have a Mazda CX 30, purchased in the UK, nearly 3 years old, warranty expires next month. For the last six months or more I have had recurring issues with the flat battery. I have reported this to the dealer who has attempted remedies unsuccessfully. The last time they tested the battery and said that it was performing within Mazda's specification; then the following day the battery failed again!. I presume someone is recording this information with a view to initiating a class action in order to get a remedy or recompense. Meanwhile a workaround that I have found extremely helpful is to purchase a portable jump starter from Amazon (in the UK costing about £115) I would guess at about $100 in the US. It can get me going again after a flat battery in less than five minutes, and saves an awful lot of hassle and lost time. Though one shouldn't have to do this on a modern car within warranty. There is a range of similar devices that can fulfil this purpose. Hope this helps.
 
The last time they tested the battery and said that it was performing within Mazda's specification.
Just shows you what BS some dealers fob their customers off with! Perhaps you should have asked to view the "specification"!

Obviously, if it has been working correctly for 2 plus years all fine then suddenly started playing up then something has changed. It could just be the rather weedy battery they fit OEM that is getting tired so it might be wise to bite the bullet and fit a new one - then if the problems still exists you have a better argument with the dealer - preferably a different one if possible!

We bought a 2020 CX30 Skyactive-X about 9 months ago and within 2 days it also would not start. Luckily I insisted on a new battery under the used car warranty and we have not had a problem since - I also had a booster pack which was normally kept in our other car but now lives in the CX-30 just in case.

We are very careful NOT to have the remote key within range of the car when we have the doors/boot open for any length of time (loading for the tip/cleaning etc.) as that seems to bring extra circuits and therefore battery drain into play. It seems a particularly odd and obtuse power control system they use but they do seem to have some strange ideas anyway - like never fitting a low washer fluid warning - had these on every other vehicle we have owned in the last 30 odd years, but not Mazda?

I assume your vehicle has had the specific update for the battery control - a service record printout from the dealer will show whether or not?
 
I have a Mazda CX 30, purchased in the UK, nearly 3 years old, warranty expires next month. For the last six months or more I have had recurring issues with the flat battery. I have reported this to the dealer who has attempted remedies unsuccessfully. The last time they tested the battery and said that it was performing within Mazda's specification; then the following day the battery failed again!. I presume someone is recording this information with a view to initiating a class action in order to get a remedy or recompense. Meanwhile a workaround that I have found extremely helpful is to purchase a portable jump starter from Amazon (in the UK costing about £115) I would guess at about $100 in the US. It can get me going again after a flat battery in less than five minutes, and saves an awful lot of hassle and lost time. Though one shouldn't have to do this on a modern car within warranty. There is a range of similar devices that can fulfil this purpose. Hope this helps.
If you are planning on keeping your car for a while you might want to look into lithium ion car batteries they are warrinted for life probably more expensive.
 
I may have had this happen once in 2 years of ownership, but it does happen every time I take it in for service. From the TSB, I'm not sure why anyone would want that update, it's just a message and based on the TSB, the time it goes into power saving mode is lot less without the update. My Audi A4 B.5 had this, it's just a warning message. I don't really get everyone here seeing this message being a problem.
 
This thread is a log of when members are affected by the Low Battery issue on the Mazda CX-30 2019/2020/2021 models in all markets.

This is as a result of requests from members who are affected so that some form of evidence can be gathered in one place.

For background information the following threads should be reviewed:

To add your record, simply enter the following information in a new post below:
  • When and where the incident occurred
  • What the incident was (low battery warning/failed to start etc.)
  • Your car model and year
  • Did the car need to be recovered from the incident
  • Was a dealer involved
  • (if known) has the Battery Discharge update been applied by Mazda
We may update this as things go on.
To keep the thread tidy, I will remove posts made once details are entered into the table.
 
I have a Mazda CX 30, purchased in the UK, nearly 3 years old, warranty expires next month. For the last six months or more I have had recurring issues with the flat battery. I have reported this to the dealer who has attempted remedies unsuccessfully. The last time they tested the battery and said that it was performing within Mazda's specification; then the following day the battery failed again!. I presume someone is recording this information with a view to initiating a class action in order to get a remedy or recompense. Meanwhile a workaround that I have found extremely helpful is to purchase a portable jump starter from Amazon (in the UK costing about £115) I would guess at about $100 in the US. It can get me going again after a flat battery in less than five minutes, and saves an awful lot of hassle and lost time. Though one shouldn't have to do this on a modern car within warranty. There is a range of similar devices that can fulfil this purpose. Hope this helps.
This is such bullshit that we have to resort to carrying a jump starter. I washed my car today and forgot to leave the key far far away from the car. I just replaced my battery a few weeks ago and one event just drains the battery. I have it on battery tender as I type and looks like the battery is charging. I am also charging a sleek Audew multifunction jump starter that I had purchased eons ago. I guess I'll throw that in the trunk just in case so that I don't get stranded anywhere. Does the TSB above fix the issue or is it just a bandaid?
 
The dealer has performed an update of the Body Control Module (BCM) software and it solve my battery issue, well, I hope. One of my problem was a dead battery because the doors was open during the clean-up of the interior. This problem is solve. I hope this can help with this frustrating situation. Other than that, I love the car :) Oh!, my english is not fantastic !
 
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