just had same issue 2013 with 154000 miles on second set of plugs. wound up being weak coil pack and plugs bad i guess changed out all 4 and 1 coil pack. the dash would light up and car would go into limp mode
that is a $6 camera
and the harness that goes into the radio is $20 on ebay
i did mine for under 30$
http://www.ebay.com/itm/Axxess-AX-MA...xYMjpZ&vxp=mtr
Get the 12 volts from rear window wiper just run the video wire up to radio plug in the harness done
that is a $6 camera
and the harness that goes into the radio is $20 on ebay
i did mine for under 30$
http://www.ebay.com/itm/Axxess-AX-MAZCAM-Mazda-2011-2015-Vehicles-Back-Up-Camera-Retain-Add-On-Harness-/401113509032?hash=item5d643a6ca8:g:SAEAAOSwcLxYMjpZ&vxp=mtr
Get the 12 volts from rear...
this is a complete remote start system nothing else needed. fyi if you call them they will tell you exactly which wires to hook up to make it work . i didnt wire everything in the instructions keep in mind they didnt have the harness when i installed i spliced all my wiring.
spark plugs were very easy to change save yourself 200$ and do it yourself
as for brake fluid i say they are full of s***
Fuel service full of s*** also