VW have only recently released an all new Tiguan, so that won’t be touched for at least 3 or 4 years and then it will be a mid life tweak. The Hyundai Tucson facelifted model was also only released a few months ago. Whilst the exterior changes are minor, the interior changes are on a scale that is more akin to an all new model. I suspect it will be 3 or 4 years until the next generation Tucson is released. I didn’t look into the Sportage as the styling completely put me off, but it’s a relatively new model which (I think) has just had some tweaks so, again, I think you’re looking at a good few years before anything major. That just leaves the XC40 which, by comparison, is the old lady of the four. The last facelift was so minor that it would have made an extremely difficult ‘spot the difference’ competition 😂 Replacement has been rumoured for some time so almost certainly will be the first of the four to see an all new model (assuming that it will be replaced).
So, in summary, if you are looking at a 3 year lease, it’s safe to say that the Tiguan & Tucson definitely won’t be replaced in that time, the Sportage is unlikely to be, but the XC40 is quite likely to be replaced. Hope that helps.