With this software you can scan both modules get the actual fault code and with a quick google search usually find what needs to be replaced
Or just clear the codes and see if they come back
I can not tell you how many cars I saw that had codes for ;seat belt pretensioners ( code will say resistance issue) all this means is someone moved the seat
Now if the code will not clear then the buckle is bad.
I have seen dealers tell people to replace modules, and the only code in the module was a voltage code, this usually means the battery went dead
now this software works like the dealers scan tool so sometimes you will get codes that are only audi/vw codes they will be 5 digits (this will be the case with your air bag)
These codes are a little harder to research, but most times with air bag it will say
Side air bag igniter (all igniters are in the air bags themselves)
or it will say pretensioner (in the seat belt)
You have to know where the part is but the software will tell you a code and what the fault is.
Now sometimes faults can be caused by one part and codes will be stored for 3 parts. This is where sites like justanswer, and the forums come in handy
For instance you could get a mass air flow sensor code
and a code for a catalytic converter. Dealer would tell you to replace both at a cost of $2400-$2600 or you could replace the mass air flow sensor and clear the codes
and drive the car if the light resets for the catalytic converter then you can with this software run a test on the converters.
This software has what they call measuring blocks (to read values) or basic settings (performs adaptations, or test)
One thing every audi/vw needs is the throttle body reset every now and then with this software you can do this procedure, this ensures good fuel mileage as well as correct function.
All around there is a learning curve to the software but with all the resources on the internet you can do just about everything you will ever need to.
Now what it cant do it cant code keys to the vehicle, you cant replace the engine control module or anti theft module. This is the only down side, now to the home user this is not a deal breaker, but most automotive shops need those functions.
I have used this tool daily for the last 5 years I can answer any other questions you have about this software or any other questions you have