Question:
Done Audi Q7 2019 using Xhorse VVDI MLB tool, please confirm if you have to put the capacitors back in place and what happens if you don’t.
I managed to pull immo off the key and made dealer key with MLB Vvdi, first time trying it , haven’t tried to learn it yet as far as I can tell the key can be detected by mlb tool and remote working on oem with those two capacitors out.
Here is the clue.
Some users reported not putting back capacitors, the key still works.
Others put back only the bigger one, the key still works like new.
Key will work without, but those components are there for a reason they stabilise MCU. If you are a professional, you should put it back.
If you don’t put capacitors back, that will most likely make the key inconsistent or damage components in the long run.
The capacitors are there to stabilize/regularize the current to the remotes cpu, it will still work for a while but you have to remember they are there to ensure the CPU doesn’t get fried. So say a few weeks or a few months down the line the original remote fails that’s on you to fix.
Those are decoupling capacitors used to reduce HIGH FREQUENCY noise on the power rail on the MCU. Still will function but might fail due to rail voltages not being stable due to too much noise on the rail. Typically In pico Farhad range.
