Hi, peeps! As you know, I am an auto enthusiast, I follow a lot of tech-auto blogs to learn about new stuff in the market. Recently while surfing the auto section on Amazon India, I came across this ELM 327 OBD-II Bluetooth scanner. Despite the crude presentation and item listing, it piqued my interest and I decided to research about it.

What is ELM 327 OBD Bluetooth scanner?

Post research, I was able to infer that:

The ELM327 Bluetooth OBD2 V2.1 car diagnostic interface tool is used to read diagnostic trouble codes, both generic and manufacturer-specific, and display their meaning. The can test a lot of trouble of the car and display the current sensor data. It supports all OBD-II protocols, Works with all OBD-II compliant vehicles

Super mini elm327 bluetooth

A nifty little tool, eh?

What can it do?

Using ELM 327 OBD-II Bluetooth Scanner you can read and display:

  • Engine data such as RPM
  • Vehicle Speed
  • Long Term Fuel Trim
  • Short Term Fuel Trim
  • Timing Advance
  • Intake Air Temp
  • Air Flow Rate
  • Oxygen Sensors
  • and so much more!

Sounds impressive eh?

My experience?

So, I decided to order one for me to see what the fuss is all about and I found the package shipped to my home within 48 hours. Pretty quick for standard delivery! I got the device and a mini disc with companion software in an anti-static bag. I unwrapped the bag and almost immediately took the ELM 327 scanner for a spin.

Super mini elm327 bluetooth scanner review toyota etios

ELM 327 Bluetooth Scanner

Now, I have had already researched about the position of OBD port in my car (Toyota Etios), which was on the lower right side of driver’s cabin, so it took me less than 60 seconds to get it to fit. It’s a unidirectional port, much like a VGA port. The scanner powers on immediately upon plugging, suggesting it takes an uninterrupted current from the battery.

OBD port on my toyota etios petrol 2011 for ELM 327 mini bluetooth scanner

OBD port in Toyota Etios

Companion app(s):

Post plugging the scanner, I downloaded Torque and OBD Car Doctor as they are the top rated apps for the diagnosis and went out for a night ride with a friend to take screenshots. We went for a short run and both of us were mesmerized by the quantity & quality of data you can using this nifty little tool. It’s amazing how the response time in a few milliseconds.

Torque is a better-rated app but I found OBD Car Doctor to be more intuitive both in terms of UI & UX. Here are some screenshots for you to validate the same:


OBD Car Doctor:


ELM 327 OBD-II Bluetooth Scanner is a really cheap and value for money microcontroller produced by ELM Electronics for translating the on-board diagnostics (OBD) interface found in most modern cars.

If you are an auto-enthusiasnt and would like to know about inner loops/finctioning of your vehicle, this is a must buy.

You can even inspect the error codes yourself to know in and out of your machine. It can be really helpful from knowledge purpose as well as to prevent you from getting duped from car mechanics.

ELM 327 OBD II HUD Heads up display in car

Straight out of Minority report?! 😉

ELM 327 relies on your smartphone’s display to show up the data, though if you are more interested, you can also invest in these cool looking HUD – Head Up Display which will sit on the dash of your car and project data straight to the windshield. They look really cool, especially in the night. 😎

Let us know if you buy any of those and share your experience too. Till then?

Keep crunching those miles!