Car diagnostics without the dealer bill
Plug it in, open the app, see what's wrong. We liked this one enough to stock it — then it sold out faster than we expected.
Check this page for restock updates.
Bluetooth · USB-C · iPhone & Android
CFX7899 Certified Reader
Compact OBD-II dongle — certified for broad vehicle coverage, pairs with your phone.
Last price
$39.99
That was the price when we last had stock. No monthly fee.
Not available right now
We put the last batch up on a Tuesday and it was gone by Thursday. We're waiting on more units.
- Full scan across engine, ABS, airbags, and more
- Read and clear fault codes
- Live sensor data while you drive
- Works on most OBD-II cars from 2001 onward
- VAG coding on supported VW/Audi/Skoda models
What it does
Nothing fancy on the outside. The app is where most of the work happens.
Scans the whole car
Hit one button and it checks the main systems. You get a short summary, not a wall of codes.
Coding on VAG cars
If you drive a VW-group car, you can turn features on or off yourself instead of paying the dealer.
Live readings
RPM, coolant temp, fuel trim — whatever the car exposes. Handy when something feels off but no light is on.
Phone app
Bluetooth pairing takes about a minute. Same app on iOS and Android.
Standard OBD port
Fits the port under your dash. If your car has OBD-II, it'll likely work.
Setup
If you've ever paired a Bluetooth speaker, you can handle this.
- Step 1
Plug it in
Find the port under the steering column and push the dongle in.
- Step 2
Open the app
Turn the key to on, open CFX7899 Reader, and pair over Bluetooth.
- Step 3
Run a scan
Tap scan. Takes a minute. Save the report if you want.
In the box
- Connection
- Bluetooth 5.0, USB-C
- Protocols
- OBD-II, EOBD, CAN
- App
- CFX7899 Reader (iOS & Android)
- Warranty
- 12 months
- Returns
- 14 days