CVT oil change: DIY?

[NLinPEN]

Hello, new participant to the forum here. I bought my car new in 2016. It has a 1.5 liters engine and automatic transmission. I don't use the car a a lot: since new has it done approximately 20,000 km.
My question relates to the automatic transmission: how often does the fluid need to be changed? And is that a job you can do yourself? I was looking at the owner's manual: it states that this needs to be done by a dealer. The manual doesn't even specify where the drain and fill plugs are for this job. I don't like bringing the car to a workshop. I prefer to do all car maintenance myself.
Any advice and recommendations are welcome.

[ColinB]

Have a look at this thread:
https://clubjazz.org/forum/index.php?topic=10854.0
The consensus there is that the fluid should be changed at 25,000 miles or 2 years whichever is sooner. That’s for UK spec cars, and yours may be different (there was no 1.5 Jazz E in the UK in 2016). Moreover, I think low mileage counts as severe usage, because it implies lots of short journeys. If yours hasn’t been changed since 2016, it’s long overdue and you may be riding your luck; fixing CVT problems can be expensive.

Regarding the fill and drain locations … no idea I’m afraid.

[NLinPEN]

Thank you for your reply. In the initial years I did bring the car to the Honda dealer twice per year as it was a requirement for their warranty schedule. Looking back to those old receipts I see that the fluid was changed in 2020, four years after I bought the car. As I drive the car not that much I think it was done at that time due to the time interval. So yeah, it now being 2025, I might need to do it again.

Anyone having advice on how to change this fluid?

[Lord Voltermore]

Sorry I am not an expert and dont know how to change  it.  But I recall from reading earlier posts on here that its very important to use the correct specification of CVT oil . The correct stuff is quite expensive. Problems arise if another CVT oil, that may be suitable in most other cvt cars, is used.   This could happen even if you have the CVT oil changed by a general garage, who might just use the cheapest cvt oil they can find. 

Also I think I read (but may be wrong) that its difficult to drain all of the old  cvt oil from the car .Even using the correct workshop methods.  When refilled the car may still  contain, for example, a mixture of 25% old oil and 75% new oil.   This may not matter if the oil is changed regularly and any old oil content was still in reasonably good condition.
   But CVT gearboxes can start to malfunction if the oil degrades badly  due to neglected oil changes. (or the oil is already bad and problems are immanent) . Problems may continue if a significant proportion of contaminated oil still remains after an oil change.    I think in these circumstances they recommend a double oil change to flush most of the old  oil out. .  An oil change,  a short drive then a second oil change.    But this may not be necessary due to your low mileage. 

If you havnt already done so I recommend doing a historic search on this site for other posts about the subject. 

[embee]

I have the 1.3 here in the UK, I've changed the CVT fluid in that but of course the 1.5 may well be quite different.
As said by others,  historically the interval was reduced and I believe the wisdom says 2yrs 25k miles is a good idea.
Because a simple drain does leave a significant amount of the old oil inside a double drain/fill is recommended. However partly due to the price of the oil i concluded it was preferable to do a single drain/fill but more often, and this means that the residual oil is always "younger".
I do maybe 7k miles/year, so low miles but almost all longer trips, at least 50 miles, often 100m. I've got round to annual engine and CVT oil changes, I do them at the same time using Honda oil.
On the 1.3 it is actually easy to just remove a couple of parts of the air intake to reveal the CVT filling plug, some folk try to fill using the "level" plug, but that gets messy.

[NLinPEN]

Thank you both for your responses. In the meantime have I read some more about this topic and understand that a simple drain will not drain all fluid. Therefore, some of the old fluid will remain and gets mixed with the newly added fluid.
The Jazz Mk2 workshop manual shows a picture of where the drain plug is, and where the dipstick is, on that car model. Adding fluid is to be done via this dipstick opening. I am going to check whether my Mk3 has this plug and dipstick at the same location. If I can find it then I plan to follow the same procedure as specified for the Mk2 on my car.

[embee]

My 1.3 CVT has a fill plug on top, a level plug on the side, but no dipstick. Just for info.