help! Battery/Charging Issue

10

Asked by Dec 12, 2014 at 02:56 PM about the 2012 Mazda MX-5 Miata Grand Touring RWD with Power Hard Top

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

27,815

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.
27,815

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

MX-5 Miata

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

CarGurus has 4,166 nationwide MX-5 Miata listings starting at $2,088.

ZIP:

Mazda MX-5 Miata Experts

  • #1
    Michael Kane
    Reputation
    2,130
  • #2
    Tom Demyan
    Reputation
    1,240
  • #3
    Racer_X
    Reputation
    410
View All

Related Models For Sale

Used Ford Mustang
348 Great Deals out of 41,846 listings starting at $1,488
Used Chevrolet Corvette
114 Great Deals out of 16,238 listings starting at $3,995
Used Porsche Boxster
39 Great Deals out of 1,244 listings starting at $4,995
Used BMW Z4
34 Great Deals out of 926 listings starting at $4,350
Used Nissan 370Z
62 Great Deals out of 2,605 listings starting at $7,999
Used Chevrolet Camaro
389 Great Deals out of 31,491 listings starting at $3,000
Used Honda Civic
601 Great Deals out of 52,409 listings starting at $999
Used BMW 3 Series
1,144 Great Deals out of 34,047 listings starting at $1,209
Used Subaru BRZ
27 Great Deals out of 1,049 listings starting at $11,753
Used Scion FR-S
21 Great Deals out of 897 listings starting at $9,500
Used Jeep Wrangler
389 Great Deals out of 20,600 listings starting at $2,500

Used Cars For Sale

2017 Mazda MX-5 Miata For Sale
1,730 listings starting at $21,710
2016 Mazda MX-5 Miata For Sale
10 Great Deals out of 425 listings starting at $16,897
2015 Mazda MX-5 Miata For Sale
5 Great Deals out of 137 listings starting at $14,888
2014 Mazda MX-5 Miata For Sale
83 listings starting at $11,899
2013 Mazda MX-5 Miata For Sale
6 Great Deals out of 81 listings starting at $10,995

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.