2021 Hyundai I20 N Line Mhev T-GDI 1.0L Hybrid electric · GP21 TSO

The 1.0-litre T-GDi mild-hybrid is officially capable of mid-50s mpg in mixed driving, with real-world figures typically landing between 45-55 mpg depending on driving style. As a mild hybrid registered after April 2017, this i20 sits in a low VED band and is unlikely to attract the supplementary luxury car tax, though current owners should confirm whether the standard rate or premium rate applies based on the listed RRP at first registration. Insurance for the N Line trim is typically in groups 15-18, so annual premiums for a typical UK driver should fall in the £400-£700 range.

Routine maintenance for the T-GDi engine is relatively affordable, with oil and filter services around £150-£200 at independent garages and slightly more at a Hyundai main dealer. Brake pads and discs are modestly priced given the car's light weight, and the mild-hybrid components themselves rarely need attention outside of the 12V battery. Tyres on the N Line are typically 215/45 R17 and a quality replacement set runs £350-£500 fitted. Assuming 9,000-10,000 miles per year given the observed usage pattern, fuel alone should cost around £1,400-£1,600 annually at current pump prices.

Estimated annual running cost covering fuel, road tax, insurance, and routine maintenance for this vehicle sits at approximately £2,400-£2,800.

The aggregate failure data for the i20 points to three specific areas worth focused attention during a viewing. First, inspect all four tyres closely for tread depth, sidewall damage, and uneven wear, as tyres are the single most common MOT failure reason across this model range. The N Line trim uses a sporty 17-inch wheel which can be more prone to kerb damage and accelerated shoulder wear, so look for any kerbing on the alloys and check the inner edges of the front tyres for camber wear. A budget of around £400 should cover a full set of replacements if needed.

Second, test every seat belt buckle in the vehicle for positive latching and release, as seat belt buckles are the second most common MOT failure point across this model. This includes the rear seats, which can seize if rarely used. Cycle each belt a few times and check for slow retraction or fraying near the top mounting point. A faulty buckle replacement at a dealer can cost £150-£250 including labour, so it is worth negotiating on if any show signs of sticking.

Third, check the windscreen wiper blades and washer system operation, as wiper failures are the third most common MOT issue for the i20. Confirm both front blades clear the screen without smearing and that the rear wiper on this five-door hatch functions correctly. Beyond these model-specific items, inspect the standard items for any five-year-old car: brake disc lipping, coolant condition, and any warning lights on the dashboard, particularly relating to the mild-hybrid system.