2022 Lexus RX 3.5L Hybrid electric · LT72 RXK

The Lexus RX 450h typically returns around 35-40 mpg in real-world driving thanks to its 3.5-litre V6 hybrid powertrain, which is competitive for a vehicle of this size and weight. As a Euro 6 AP hybrid, annual road tax sits in a relatively low band, and the RX is generally placed in insurance group 40-42, which is higher than mainstream rivals but reflects its premium positioning. Standard maintenance costs are moderate, with hybrid servicing typically cheaper than conventional equivalents due to reduced brake wear, though parts and labour at Lexus dealers command premium rates.

Estimated annual running costs including fuel, tax, insurance, and routine maintenance sit in the region of £2,200-£2,800 for a typical driver covering 8,000-10,000 miles per year. Major service intervals are every 12 months or 10,000 miles, and the hybrid battery warranty extends to around 10 years with proper maintenance. Tyres, as evidenced by the recent MOT advisories, will be a recurring cost given the vehicle's weight and likely fitment of run-flat or premium-spec tyres.

The September 2025 MOT advisory flagged both front tyres as worn close to the legal limit on their edges, so measure tread depth across the full width and inspect for uneven wear patterns that could suggest tracking or suspension issues. Ask whether the tyres have been replaced since the test, as worn-edge tyres typically need replacement promptly. Beyond the MOT notes, the aggregate data for this model highlights headlamp issues as the most common failure point, so verify all exterior lights function including the distinctive Lexus LED daytime running lights and check headlamp lenses for condensation or internal misting.

Suspension arm wear is the third most common failure on this model across the 17,892 vehicles analysed, so listen for knocking or clunking over speed bumps and during low-speed manoeuvres. Inspect the undertray for damage and check the front suspension components visually for any weeping from dampers or perished bushes. Given the 3,456cc V6 engine, check for oil leaks from the engine sump and inspect the coolant system for any signs of staining. Verify the hybrid system functions correctly by observing the energy flow display during a test drive — the system should transition smoothly between petrol, electric, and combined modes without warning messages.