• Hybrid-only powertrains
• RX struggles to top 35mpg
• Newer rivals offer lower running costs

The Lexus RX may be a hybrid, but don’t go expecting running costs to be the lowest in class. The hybrid system uses a 3.5-litre V6 engine at its core, which means that – while it’s still commendably frugal for such a large engine – it’s not cheap to run as rivals using newer hybrid systems or even conventional diesels.

Lexus claims a maximum of 35.7mpg for the RX and in our testing we’ve found that just about achievable. One benefit of the self-charging hybrid powertrain is that it’s less sensitive to the type of road you’re driving on, so the claimed fuel economy is as easy to achieve around town as it is on a constant cruise. And you don’t need to be blessed with a large driveway and home charging point to get the best economy out of it.

Still, plug-in hybrid rivals can now manage the vast majority of journeys on electric power alone, which the RX with its comparatively puny battery can’t do. And models equipped with diesel engines will top 40mpg on a long run with ease – even much larger vehicles like the full-sized Range Rover.

CO2 emissions for the Lexus RX sit between 178-183g/km depending on wheel size, again much higher than rivals equipped with plug-in powertrains.

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Servicing and warranty

The ownership experience is what sets Lexus apart. When you see your dealer for your annual service you’ll enjoy award-winning levels of customer support, with helpful and efficient staff. Lexus dealerships are somewhat legendary for this level of aftercare and though servicing isn’t the cheapest, owners are more than happy to pay.

Servicing at an approved Lexus garage also nets you another benefit – access to the market-leading ten-year ‘Relax’ warranty package.

Reliability

• Should prove faultless
• Lexus models typically perform very well
• A strong reputation for reliability

Lexus owners very rarely have any complaints about reliability in any model, and even the very particular sort of customer who’d opt for the brand flagship can find little to moan about with the RX. This is a well-built car that, if maintained, should remain flawlessly reliable through its life.

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Being so long in the tooth is good on this front too, as there’s no technology in the RX that hasn’t been extensively well-proven over the years. All there is for potential owners to note is one recall affecting a small number of cars built between November 2015 and June 2016. If you’re buying a used Lexus RX that was registered around this period, make sure the recall work has been undertaken.