Been car shopping for about a month now and I keep going back and forth on what type of transmission to go with. Really like the fuel economy of CVTs and how smooth they feel around town but everyone I talk to has a strong opinion about whether they last or not. My brother in law had a Nissan with a CVT that gave him problems around 150,000km and he swears he'll never buy another one. But then I see so many newer cars on the road here with them and they seem to be doing fine. I do quite a bit of highway driving between Dubai and Sharjah for work so whatever I get needs to handle that without stressing out. Been reading whatever I can find about transmission durability in hot climates and came across some detailed technical info on https://gearboxrepairsharjah.ae/ that actually explains the differences in how they handle heat and stress. Made me realize maybe it's less about CVT vs traditional and more about finding a specialist who knows how to maintain whichever one you end up with. Anyone here have a high mileage CVT that's still going strong? Or should I stick to old school automatic and accept slightly worse fuel economy for potentially better long term reliability? Really torn on this one and it's basically the last thing holding me up from making a decision.

Your brother in law's experience at 150k is actually pretty common with older Nissan CVTs specifically but the newer generation units from Toyota and Honda have a significantly better track record in UAE conditions than that era of Nissan belt CVT. The brand matters as much as the transmission type when it comes to CVT reliability so lumping all CVTs together based on one experience with one manufacturer is not quite the right way to look at it. Do your research on the specific model you are considering rather than the transmission type in general.

I have a Corolla with the Toyota CVT and it is at 180,000 kilometres doing the Dubai Sharjah run regularly with zero transmission issues so far and I am not particularly careful with maintenance beyond the standard service intervals. The highway driving you mentioned is actually less stressful on a CVT than city stop and go because the belt operates in a more consistent ratio range at steady highway speeds rather than constantly hunting through the full range. Heat management is the real factor in UAE conditions and keeping the CVT fluid fresh on schedule matters more here than in cooler climates because degraded fluid is behind most of the failures people complain about.

Been working adjacent to the automotive repair industry here for a few years and the honest answer is that CVT reliability in the UAE is almost entirely about two things, the brand and the fluid change discipline of the owner. Toyota and Honda CVTs with regular fluid changes at shorter intervals than the manufacturer recommends for UAE heat conditions consistently reach high mileage without problems. The failures that give CVTs a bad reputation here are overwhelmingly in cases where the fluid was never changed or changed too late after the heat had already degraded it significantly. Traditional automatics are more forgiving of fluid neglect which is probably why they feel more reliable to people who are not particularly attentive to that specific maintenance item but a properly maintained CVT from a reputable manufacturer is not the reliability risk that reputation suggests.

The insight you found about maintenance being as important as the transmission type is genuinely the most useful frame for this decision. A traditional automatic from a brand with a mediocre transmission history will outlast a neglected CVT from a reliable brand but a well maintained CVT from Toyota or Honda will outlast a neglected traditional automatic from the same brands. For your specific use case of regular Dubai Sharjah highway driving the CVT actually has an advantage in that environment because highway cruising is where CVTs are most efficient and least stressed compared to constant urban stop and go. Make the decision based on the specific car you want rather than the transmission type and then commit to shorter fluid change intervals than the handbook suggests for UAE conditions and most of the reliability concern goes away.

Really torn on this one is completely understandable because there genuinely is not a simple answer that applies across all CVTs or all traditional automatics, it depends too much on the specific vehicle and how it gets maintained. What I would suggest is narrowing down to two or three specific models you actually want to own and then researching the transmission reliability history of those specific cars in high mileage ownership rather than asking the broader CVT versus automatic question. Owners forums for specific models will give you far more useful information than general transmission type comparisons because you will find people who have done exactly the kind of driving you are planning and can tell you what happened at 150k and 200k with proper maintenance. That specific research will make the last decision much clearer than the general debate which honestly has strong opinions on both sides for good reasons that do not all apply to every car equally.