The engine designation and number are located on the front side of the cylinder block at the joint between the block and the cylinder head
Warning: A sticker with this data is also located on the timing belt guard, the data is also provided on the service plan and the spare wheel channel.
The nameplate (B) is located on the rear cross wall.
Vehicle Identification Number (chassis number) visible in the window of the water collection compartment - A
Vehicle data plate in the spare wheel well
1 – Internal factory product number.
2 – Vehicle identification number.
3 – Car model code.
4 – Detailed model designation/Engine power.
5 – Letter designation of engine and gearbox models.
6 – Paint number/interior equipment code.
7 – Additional equipment code.
8 – From left to right: Unladen weight (kg)/Fuel consumption urban (l/100km)/Fuel consumption extra-urban (l/100km)/Fuel consumption combined (l/100km)/CO₂ emissions (g/km).
Warning: The data is also in the service book.
| WAU | ZZZ | 8L | Z | W | A | 000234 |
| 1 | 2 | 3 | 4 | 5 | 6 | 7 |
The chassis number is deciphered as follows:
1 – Manufacturer code: WAU - Audi AG.
2 – Equipment.
3 – Two-digit type code. 8L – Audi A3.
4 – Detailed equipment.
5 – Year of manufacture: W - 1998, X - 1999, etc.
6 – Place of manufacture.
7 – Chassis number.