23Z7 2019-07-24

[Nick Stubbs]

Any one know what this Engine control unit update is please, just had a letter recorded delivery asking me to make an appointment to take the van in, is this the add blue thing ?

 

[kurienp]

Yup. It is the one.

 

[SimonB]

Make sure they hand you a piece of headed paper with 8 spaces on it for your 8 free AdBlue fill ups with the receipt when the upgrade been done. The top up takes about 10 mins and my local dealer did it whilst I sat in the vehicle.

That saves them having to wipe everything he may have touched moving it into the workshop. I had assumed they would check the max & min amounts they could add, which appears when the reminder comes on, but they didn't. He had a 10 litre bottle, 2.2 gals, which was just a bit under the max it would take.

 

[Nick Stubbs]

Question is will it be detrimental to the van not to have it done, the van is now out of warranty and had its last service around 4 weeks ago and as this update has been around a while dont understand why they didnt just do it, the other issue it is a days holiday to take it in not as we are going anywhere at the moment. Apart from a possible slight improvement on an enviromental issue are there any benifits. Thanks all for the info so far.

 

[SimonB]

My understanding is that it increases the consumption of AdBlue to decrease the pollution. I've not noticed any degradation in fuel economy or performance, but then I don't drive it hard anyway. There are a lot of experts on here who will know a lot more than me about the update. Have you searched the Forum using
site:vwcaliforniaclub.com xxxxxx and put in updates or the update name, 23Z7 I seem to remember a thread on this when the update first came out last year. Here is a link to one of the previous threads
https://vwcaliforniaclub.com/threads/recall-23z7-safe-to-ignore.30181/ There are quite a few more.

Simon