help! Battery/Charging Issue

10

Asked by Dec 12, 2014 at 02:56 PM about the 2012 Mazda MX-5 Miata Grand Touring Convertible w/ Retractable Hardtop

Question type: Maintenance & Repair

This has been a chronic problem with my miata.  I have a 2012 hardtop.  If I don't drive
the car for about a week, the battery dies.  I've been towed twice into the dealer, and
each time had the charging system checked.  Each time they said that they could see
nothing draining the battery at all.  They suggested I buy a battery tender for when then
car is idle, which I did.  Especially makes sense for the winter months.  Its a constant
battle to get the dealer to go any further.

Finally I thought I just might have a bad battery.  I went out and bought a highly rated
aftermarket battery, and sure enough when I had to park the car outside my garage for
a week.  It died too.  Do you have any suggestions?

5 Answers

26,125

I had the 2011 MX-5 Hardtop (which I traded about 2 months ago)...The only battery issue I had was during the winter when I parked it for over a week and driving my SUV instead. The OEM battery drained and had to have AAA replace it. Negligence on my part, since there are still things that draw from the battery even when the car is off....Out of curiosity, I looked to see what others had to say about this...One reason in your case (and also mine) was that the key knob may not have been turned all of the way to the "off" position (which is at a odd angle) from the "acc" position. The MX-5 definitely needs push button start..hopefully, the next gen car will finally have it!

1 of 1 people found this helpful.
10

interesting... I'm taking it to a mechanic outside the dealer to investigate. Let's see what he says. Thanks !

1 of 1 people found this helpful.
26,125

No problem, minkmanVa! I owned my 2011 MX-5 PRHT for 2 years without ANY chronic problems at all. IMHO, it's a well-built & very reliable car. I'd be curious to hear what someone (besides the Mazda mechanic) has to say after giving it a look! :::Still miss my MX-5..hope she finds a new & caring owner soon (she's still at the Dealer's lot waiting for a buyer):::

1 of 1 people found this helpful.

Okay I've read many posts from owner who have a phantom draw on their battery. The problem I'm addressing is for the cars where the room fuze draws close to 1amp it should only be about a tenth of that value. Your problem is a bad ecu. Something fails and shorts inside the ecu initially you find a blown 10amp room fuse you replace the fuse and it then starts this excessive draw. A small current should be expected as it maintains error codes. A new ecu solved my problem sorry for the bad news.

I have a 1994 Mazda Miata. I experience the same problem with my car battery. If I don't drive it for a week, the battery dies. I bought a battery charger, but the battery does not get charged any more. Weird! Are the remedies only: Trickle charger, Solar- operated continuous charger, Battery key-switch to disconnect the negative or positive cable, or un-plugging the negative when not driving the car? SOS! HELP!

Your Answer

Add photo

Related Questions

  • help! Battery/Charging Issue 5 answers

    This has been a chronic problem with my miata. I have a 2012 hardtop. If I don't drive the car for about a week, the battery dies. I've been towed twice into the dealer, and each time had the cha...

    2012 Mazda MX-5 Miata Grand Touring Convertible w/ Retractable Hardtop

    -

    Maintenance & Repair

  • Dead battery 3 answers

    Battery replaced and alternator checked ok...picked up car...engine light on...won't test cause not communicating...interior lights won't work...keys don't unlock or lock...radio not functioning

    2005 Mazda MX-5 Miata Base

    -

    Maintenance & Repair

  • 1995 Mazda Miata NEED HELP ASAP 2 answers

    I was driving down the highway going 70 in 5th gear and out of nowhere my check engine light came on, my rpm's dropped instantly and the motor stops. I pulled over, turned the car off and tried to...

    1995 Mazda MX-5 Miata Base

    -

    Maintenance & Repair

  • Miata Battery 7 answers

    I was just told that the only diffrence between the batery in my miata and my lawn tractor are the posts is this true the price for a miata battery is $120 and the tractor bat is $25 seems l...

    1995 Mazda MX-5 Miata M-Edition

    -

    Maintenance & Repair

  • acceleration issue under 2000 rpm 6 answers

    My 1990 mazda miata will not accelerate sumtimes under 2000 rpm, it is like it is under a heavy load. When this happens you can push the clutch in and the throttle seems to come back to normal, rele...

    1990 Mazda MX-5 Miata Roadster

    -

    Maintenance & Repair

MX-5 Miata

Looking for a Used MX-5 Miata in your area?

CarGurus has 3,928 nationwide MX-5 Miata listings starting at $1,800.

ZIP:

Search Mazda MX-5 Miata Questions

Mazda MX-5 Miata Experts

#1 Michael Kane
Michael Kane
Reputation 2,000
#2 Tom Demyan
Tom Demyan
Reputation 1,210
#3 Racer_X
Racer_X
Reputation 390
View All

Related Models For Sale

Used Ford Mustang
708 Great Deals out of 44,429 listings starting at $1,500
Used Chevrolet Corvette
223 Great Deals out of 22,144 listings starting at $3,750
Used BMW Z4
41 Great Deals out of 1,057 listings starting at $3,950
Used Chevrolet Camaro
357 Great Deals out of 31,259 listings starting at $2,500
Used Porsche Boxster
49 Great Deals out of 1,146 listings starting at $4,480
Used BMW 3 Series
1,005 Great Deals out of 31,317 listings starting at $1,000
Used Nissan 370Z
55 Great Deals out of 2,699 listings starting at $10,994
Used Subaru BRZ
13 Great Deals out of 1,054 listings starting at $12,991
Used Honda Civic
822 Great Deals out of 83,796 listings starting at $750
Used Mazda RX-8
14 Great Deals out of 372 listings starting at $1,499
Used Scion FR-S
32 Great Deals out of 949 listings starting at $9,495

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.