By this logic you should have to go for a cert if you take your wheels off or put new brake pads in. Which the LVVTA once actually insinuated in a particularly dented Facebook post about brake rotors needing to be certed in case you installed the wrong size ones (???). Honestly they do my f***ing head in and I hope they read this, yes without them it would be very very hard (actually I don't know, would it?) to modify cars and they provide a framework for us to do that, but some times it's completely cooked. Literally from the NZ Car Construction Manual:     And it's just bulls***, over the years they've had some spectacularly useless rules that have taken years to peel back and cost modifiers thousands of dollars to comply with stupid requirements that, if someone engaged their brain for about 20 minutes, wouldn't have made it past the draft stage. When was the last time you heard of a driveshaft hoop that did f*** all on a modified JDM car with less than about 800hp?   The entire organisation was built around the concept of bearded hotrodders (who are wonderful, btw) stick welding bits of car together in their shed, not the "modern" version of car modding which is basically Lego except larger, dirtier, and generally undertaken by people with lower IQs.   EDIT: Apologies OP for derailing your thread. I guess the sparknotes is "be prepared for some bizarre obscure cert requirement".

in theory yes I agree   but in reality can people (the Greater-unwashed-Public) really be trusted to do bolts back up tight, or even use the right washer?   Especially on critical safety items like Brakes or steering ❤️   kinda why Juddies (Adjustable Suspension) = Cert : are all 'basic' top hat bolts / brake line clips & ride height checks   pretty sure anyone logged onto this Forum is capable = yes   then there's the FB Group Mechanics  yeah nah  

Standard example of one of the completely dented areas of the LVV standards. If you use all OEM parts from an identical but manual vehicle it should be a VIRM issue not a cert one.   If a compatible manual ECU exists I'd go looking for one. Will make your conversion much less likely to throw a million different error codes.

Thanks Joker, much appreciated!

Plan for a LVVTA Cert too   Fun police here : as soon as you change or touch the Brake Pedal from OEM   you need a cert Technically & Legally Speaking ❤️ even if you're simply swapping factory parts they are NOT OEM to that car   yes, it can be done, yes people have got wof's without a cert after such a swap   I'm trying to find the thread on here, it has been covered before BUT reasonable difficult to search "terms"   and it is actually covered on the LVVVTA Site FAQ   https://www.lvvta.org.nz/knowledge_base.html   screen shot :      text version