Key security light flashing, battery wont hold charge, acceleration problems

Asked by Feb 07, 2017 at 07:21 PM about the 2009 Mazda MAZDA3

Question type: Maintenance & Repair

8 weeks ago after a batch of dirty fuel my car has never been the same. The
tank wasnt flushed but fuel run as low as possible  before putting fuel in it
again. Last week it started losing acceleration power ran sluggish and jolting.
Then battery went flat. After 24 hours on charge battery went flat very quickly
and the system security key is flashing on the dash board even when the keys
removed from the ignition. I am baffled. It recently had a major service

3 Answers


The battery issue is not related to the bad fuel. That would be a bad battery or alternator. I would replace the fuel filter and use a good fuel system cleaner.

1 of 1 people found this helpful.

Hi, thanks for that. The fuel filter was replaced recently. Im thinking maybe like you said bad battery or alternator.


If you have a lot of gunk in the tank you may need to replace the fuel filter again. Also clean and tighten the battery connections.

Your Answer


Looking for a Used MAZDA3 in your area?

CarGurus has 2,623 nationwide MAZDA3 listings starting at $880.

Postal Code:

Mazda MAZDA3 Experts

  • #1
    Tom Demyan
  • #2
    Richard Boettger
  • #3
    Tracy Hooks
View All

Related Models For Sale

Used Mazda MAZDA6
22 Great Deals out of 605 listings starting at $1,888
Used Honda Civic
298 Great Deals out of 3,463 listings starting at $995
Used Toyota Corolla
195 Great Deals out of 3,776 listings starting at $2,245
Used Honda Accord
84 Great Deals out of 1,042 listings starting at $1,200
Used Ford Focus
108 Great Deals out of 2,715 listings starting at $1,100
Used Toyota Camry
62 Great Deals out of 1,952 listings starting at $750
3 Great Deals out of 37 listings starting at $6,888
Used Hyundai Elantra
184 Great Deals out of 3,371 listings starting at $2,295
Used Nissan Altima
75 Great Deals out of 1,352 listings starting at $2,500
Used Volkswagen Jetta
95 Great Deals out of 2,235 listings starting at $950
Used Subaru Impreza
64 Great Deals out of 822 listings starting at $2,495
Used Mazda MAZDA5
20 Great Deals out of 470 listings starting at $1,497

Used Cars For Sale

2017 Mazda MAZDA3 For Sale
4 Great Deals out of 128 listings starting at $15,900
2016 Mazda MAZDA3 For Sale
13 Great Deals out of 171 listings starting at $12,995
2015 Mazda MAZDA3 For Sale
25 Great Deals out of 231 listings starting at $9,495
2014 Mazda MAZDA3 For Sale
84 Great Deals out of 591 listings starting at $8,777
2013 Mazda MAZDA3 For Sale
9 Great Deals out of 213 listings starting at $5,999

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.