Reddit mentions of Docooler Super Mini V1.5 ELM327 Bluetooth OBD2 OBD-II CAN-BUS Diagnostic Scanner Tool

I woudln't buy one without first getting an ELM327 Bluetooth ODBD2 diagnostic scanner and checking the battery's health with LeafSpy for Android or some equivalent to both.
The one I bought in 2014 is this one, but it is currently unavailable.

Great read, heres a $5 cheaper version on Prime of the bluetooth connector

http://amzn.com/B0090ZJPMK

nothing your typical ELM327 mini cant already do, while paired to your non IOS phone with torque pro installed.

verizon prices: 75$ plus mobile data fees involved...

ELM327 price: 7-15 dollars on ebay

torque pro app price: 5$ on google play store

I don't like to run my AC just the heater, the first thing to prob go will either be a locking mechanism in one of the doors or god forbid your head gasket.

Don't add any weird shit to your coolant, pop the hood every other week and have a look around for any deposits on the block of coolant or anything.

I would also recommend getting one of these bluetooth OBD scanners and use the Dashcommand app with it. So should a light come on your dash you can diagnose it quickly.
https://www.amazon.com/dp/B0090ZJPMK/ref=cm_sw_r_awd_PZ-mub1NYDN31
These are not iPhone compatible but are on androids. If an ABS issue arises it will have to go to a shop that has the right stuff to diagnose it, not many obd scanners can touch a Rovers ABS computer.

Premium ga$ only! Have fun!

Amazon, $15
its down to $10 now

http://www.amazon.com/ELM327-Bluetooth-CAN-BUS-Diagnostic-Scanner/dp/B0090ZJPMK/ref=sr_1_7?ie=UTF8&qid=1367946933&sr=8-7&keywords=obd+ii+bluetooth

Mine works great but the quality seems iffy, there are many others on Amazon though that are similar prices. Mine has worked on my WRX, my Wifes Mazda, My friends Jeep and another Friends Ford Explorer. (I have become a go-to for getting CEL codes diagnosed)

then I actually purchased an app $5 called "torque" on the google play market (android). It allows me to read codes, display anything from boost or coolant temp to speed and RPM, and even has built in 0-60 tests and can use the phones accelerometer. You can also do data logging and record videos with the data embedded in the video. It will even do a map overlay using google maps and GPS data.

Better still

Combined with a smartphone/tablet application like Torque and hey presto.

So lucky! If your check engine light does come on you should get one of these! http://www.amazon.com/ELM327-Bluetooth-CAN-BUS-Diagnostic-Scanner/dp/B0090ZJPMK
So handy and can save you tons of money!