Ecm is engine control module. Do you mean the module for the mirrors.
To make it work you'll need the mirrors, wiring harness, module and switch. Might be worth you speaking to the supplier of the mirrors to see if they have the rest of the parts.
That's right, definitely keep the original for module etc. We've seen numerous cases where people swap doors over and not the original module and it causes problems with the central locking
Worth Looking for a second hand one on eBay and include international sellers.
The aftermarket alarm could present you problems down the line. Especially as your car should have come standard with an alarm.
Audi are bound to say that to get out of paying for it. For you to take out a service plan did they do a health check at Audi prior to the washers stop working.
Definitely could be the pump.
Welcome to the forum you'll find the members on here are a friendly and helpful bunch 🙂
Check out YouTube videos for buyers guides etc.
Please keep us posted on how you get on
In terms of driveability the s tronic is the most refined. The other two types of Audi auto gearboxes would be tiptronic or CVT, tis is more generalised.
Service history is key on any car you're looking at and you should be looking for prof of gearbox oil services. If you're worried then you're better sticking with the 6 speed manual
I'd recommend picking up a few performance VW magazines. As they will list who's carried out the work on the cars featured. Might be worth sourcing some bank issues from eBay.
Wide front wings should be out there, I know I can get fibreglass wide ones for my A6 for example.
Have you considered rs3 bits?
Not sure if it's the same on the 8p but in the A6 C5 the rs6 is wider and longer for example so bits dont just fit. Just worth researching.
You'd be best searching for A3 8p bodykits to see what pops up.
Or search on the max power Facebook groups for modded A3s.
Space saver would fit. The VW Polo one should be the same as the A1.
Is the battery in the wheel well?
Also I'd recommend looking on eBay for the space saver and kit.