Please help me work this out.

[Jordantool]

Hi I currently own a 2003/2004 A3. And I’ve got a very intermittent starting fault on it. The fault will only occur in warm conditions and if I’m stuck in traffic.
when it is warm it could even cut out when driving.
I have no leaks but I have a feeling it might be one of my speed sensors or my timing belt. If anyone knows what it could be please let me know.

 

[norris_309]

Sorry to say the usual, but the first place to start would be scanning it for any error codes.
Doesn't sound like a timing belt issue (but i'm no mechanic), more like a sensor playing up maybe?