Steve Q

This could be an issue with the gear linkages or clutch. Is it smooth to engage the clutch? Is there any clutch slip etc?

I should also add two things: 1. If you were to convert it to petrol engine then you'd probably find it easier to get it ulez compliant. You'll definitely need a complete donor car for this. 2. UK MOT rules changed regarding emissions in 2002. Up to 2002 (02 registered) car emissions were based of the engine and when it was manufactured. So for example, if you fitted a 1970s rover V8 to your 2001 Audi it would only have to meet the 1970s emissions regulations. Cars registered from September 2002 (52 registered onwards) had to meet the emissions of the car as it was made that year. So you couldn't fit a river V8 engine to post 52 registered cars as emissions would be higher than the original engine when new if that makes sense.

You're welcome 🙂

To change an engine on an Audi with all the electronics and imobiliser stuff is a nightmare. You'd be far better off changing the car. If the car is sentimental and you're adamant to do it then the best option would be to buy another A3 that is ULEZ compliant and changing everything over including engine, gearbox, ECU, full wiring loom, instrument cluster, high pressure fuel pump etc.

Instrument cluster issues are well documented. I'd recommend getting an auto electrician to take a look at the power drain.

Where abouts is it leaking from? Leaking injector seals are common.

Glad you got sorted 🙂

I think it might be worth you speaking to Audi customer services as you'll need a build certificate from them. You might also need a certificate of conformity from them to confirm the vehicle emissions to help with correct taxation class.

I suspect it's in the boot either right or left side panel.

Keep us posted on how you get on

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What fault codes?

I'd recommend a diagnostic check to see if any fault codes flag up