Hi, can anyone help. I need to take photo of engine serial number but until now, know one can tell me where to find it!
Model: 2005 A3 2.0 TFSI Ambition

 

There are 3 options I'm aware of to find the engine code:
1. Open the service book (if you still have it). It's on a piece of paper on the first page (looks almost like a receipt or race slip)
2. Open your trunk and look in the spare wheel area. There is a sticker that shows the engine code, paint code and other useful information
3. Call Audi and give them your VIN - they can tell you what engine code you have.

 

Thank you Sheldon for your suggestions, but, I'm after the engine number, I have the code, it's where you suggested.