Hi I’m trying to find my ecu number for my mk1 53 plate 1.9 tdi without having to look under wipers ect as not very machanicly minded is there a way to find this I’ve got the sticker from inside the boot but not sure if it’s on this  if anyone could help would be very grateful thanks 

According to the parts catalogue, for an ASV engine built on or after 1st August 2003 the engine ECU will be part number  038 906 012 HC:

 

Hi thanks wino very much appreciated hope you had a good Christmas mate regards andrew

I hope you dont mind me asking why you need to find the part number, is it by any chance because a garage or mechanic unable to resolve a problem have told you that it needs a new ECU?

 

If so then explaining the details of the problem on here may well result in a simple and cheap resolution and avoid a lot of wasted time and expense.

 

 

It's a good point from @J.R., ECUs themselves tend to be massively reliable, as long as moisture hasn't got into their connectors.

To be honest I’m looking to get buy a ecu stage 1 remapped ecu with out the hassle of looking at the one on my car as I’d have to wait for my my mate to get time to do it for me as I’m not mechanically minded at all  the one one the car is fine I just want a bit more go about it. Thanks for your reply s 

8 hours ago, Vin681 said:

To be honest I’m looking to get buy a ecu stage 1 remapped ecu with out the hassle of looking at the one on my car as I’d have to wait for my my mate to get time to do it for me as I’m not mechanically minded at all  the one one the car is fine I just want a bit more go about it. Thanks for your reply s 

I would be careful then. It’s easy to add a generic map or buy an off the shelf version. Doing so (as with adding any power improvement) will highlight any weaknesses. Clutch, Turbo, etc.

 

If you’re going to have a remap, factor in a new clutch if you haven’t already, and do not be surprised if it goes. 
 

Wanting more power? Do the basics first. A full service is key. Check paperwork to see when the clutch was last changed. Check all your pipes and connections on them. It’s easy to pop a boost pipe and you need to know how to reconnect them.

 

This isn’t said to scare you, it’s just a risk we all take when we modify our cars. And, you need to be aware of it. Especially if you’re just going to swap out an ECU or, chuck a map on it.

Edited 27 December, 20214 yr by DeanVRS20VT

I did what you propose on my MK2 Octavia and there were only positives.

 

I'm not sure if its the same on the MK1 but its logical that it would be, the immobiliser data is shared with and/or stored on the ECU, sellers of the "plug n play" units will have disabled the immobiliser in order to make it work, this for me was an advantage as theft is not a problem but the cost of programming new keys and the availability of such where I live is prohibitive.

 

If your vehicle has visible modifications and might be a target for thieves you should check the immobiliser situation regarding the exchange ECU.

 

One other thing my odometer display still showed the correct mileage for the vehicle but if I did a milage check using VCDS it brought up the much higher mileage that the donor vehicle of the ECU had covered.