u/Bulky-Engine5318

Hi everyone,

I have an Audi A3 8L 1.9 TDI (2003) with automatic transmission.

My problem:
The car drives fine, but reverse gear is not working.

I bought a used automatic transmission, but when my mechanic tried to install it, he said it does NOT match my original one (different type).

Unfortunately, we could not read the transmission code on my original gearbox, but I was told it might be “FST”.

I bought a used automatic transmission, but when my mechanic tried to install it, he immediately saw that it does NOT match (different housing/design).

The problem is: the code on the replacement gearbox is not readable.

Now I’m trying to find the correct replacement.

Questions:

**•	Does it have to be exactly FST, or are there compatible alternatives?**  
**•	How can I safely identify a matching gearbox before buying?**  
**•	Are all 01M gearboxes interchangeable for 1.9 TDI?**

Any advice would really help. I don’t want to buy the wrong one again.

THANKS :)

(Chatgpt helped me a lil bit)

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u/Bulky-Engine5318 — 11 days ago