Hyundai i30 Premium MHEV T-Gdi (2021)

Estimated running costs and MOT pass rates from 191 MOT tests in 2024.

Annual Cost

£1,780

£148/month

MOT Pass Rate

85%

Good

Road Tax

£200

Standard rate/year

Est. Insurance

Grp 1-8

998cc Petrol

Solid Option

85% pass rate, £1,780/year to run. Close to the average across all models.

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Petrol998cc5 years old191 tests23k miles avg

Annual Running Costs

Fuel (Petrol, 998cc)

~50 mpg

£1,175

Road Tax

Standard rate (from April 2017)

£200

MOT Test

£55

Predicted Repairs

£350

Total per year£1,780

Per month£148/mo

Per week£34/wk

Estimates based on 7,400 miles/year (UK average), petrol at 174.57p a litre (GOV.UK weekly average, week of 19 October 2026), GOV.UK road tax rates and repair likelihood from MOT data. Insurance not included. Cars registered from April 2017 pay the £200 standard rate, plus £440 a year for five years (from the second year) if they cost over £40,000 new (over £50,000 for electric cars).

Reliability Verdict

85% MOT pass rate(Good)

0%All-model avg: 82%100%

Good reliability. Occasional issues but generally solid. That's close to the average of 82% across all models in our data.

85% of MOT tests on Hyundai i30 Premium MHEV T-Gdis from 2021 ended in a pass in 2024, when they were about 3 years old. That's based on 191 tests across the UK, retests included. The average mileage recorded at those tests was 22,598 miles.

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How Does It Compare?

Rank among 2021 models3074th of 3,336(bottom 8%)

Rank among Hyundai models234th of 414(bottom half)

vs average of all models+3%(82% avg)

vs 2021 models average-7%(92% avg)

vs Hyundai average+2%(83% avg)

Mileage Analysis

22,598

Average miles

22,200

Expected for age

The average 2021 Hyundai i30 Premium MHEV T-Gdi had 22,598 miles on the clock at its 2024 MOT, which is in line with the expected 22,200 miles for a 3-year-old car, suggesting normal everyday use.

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Similar Cars to Consider

Ford Fiesta

2019 · 998cc Petrol

£1,630/year

91%

+6%

Volkswagen Golf

2019 · 1498cc Petrol

£1,853/year

92%

+7%

Vauxhall Corsa

2019 · 1398cc Petrol

£2,003/year

88%

+3%

Audi A3

2019 · 999cc Petrol

£1,630/year

92%

+7%

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About the 2021 Hyundai i30 Premium MHEV T-Gdi

The 2021 Hyundai i30 Premium MHEV T-Gdi is a city car. Our records list a 998cc petrol engine, though engines vary between versions. 191 MOT tests were recorded on this model in 2024, making it a rare model on UK roads. It sits in the bottom 8% of 2021 models for MOT pass rate.

With an average of 22,598 miles recorded at its 2024 MOT tests, Hyundai i30 Premium MHEV T-Gdi owners drive about as much as the UK average.

2021 Hyundai i30 Premium MHEV T-Gdi Fuel Costs

The modest 998cc petrol engine keeps fuel costs low, which is a real advantage for a city car. Expect around 50 mpg in mixed driving, which works out to roughly £1,175 per year with petrol at 174.57p per litre (GOV.UK weekly average, week of 19 October 2026; based on 7,400 miles per year).

What does it cost to own a 2021 Hyundai i30 Premium MHEV T-Gdi?

Total estimated annual running cost is £1,780 (£148/month), broken down as £1,175 fuel, £200 road tax, £55 MOT, and £350 predicted repairs. Repair costs are moderate, reflecting the 85% pass rate. Keeping on top of servicing will help avoid surprises.

Buying a Used 2021 Hyundai i30 Premium MHEV T-Gdi

At 5 years old, the Hyundai i30 Premium MHEV T-Gdi offers good value with plenty of life remaining. Most manufacturer warranties will have expired, so a pre-purchase inspection is worth the cost.

Common Issues to Watch For

These are typical issues for cars of this age, fuel type and engine size, not faults recorded on this model's MOT tests. Use them as a checklist when you view one.

Coil Pack Failure

Medium risk

Smaller petrol engines are prone to ignition coil failures, causing misfires and rough running. Replacement is £50-£150 per coil.

Service History

Low risk

Always request a full service history. Regular servicing is the single best indicator of how well a car has been maintained, regardless of mileage.

Running Costs Compared

How the 2021 Hyundai i30 Premium MHEV T-Gdi stacks up against similar cars for estimated annual running costs, insurance group, and tax.

Car	Pass Rate	Fuel/yr	Tax/yr	Est. Ins. Group	Total/yr
Hyundai i30 Premium MHEV T-Gdi(2021)	85%	£1,175	£200	Grp 1-8	£1,780
Ford Fiesta(2019)	91%	£1,175	£200	Grp 1-8	£1,630-£150
Volkswagen Golf(2019)	92%	£1,398	£200	Grp 12-25	£1,853+£73
Vauxhall Corsa(2019)	88%	£1,398	£200	Grp 8-20	£2,003+£223
Audi A3(2019)	92%	£1,175	£200	Grp 1-8	£1,630-£150

Estimates based on 7,400 miles/year, GOV.UK average pump prices for the week of 19 October 2026, GOV.UK road tax rates and MOT data. Insurance groups are our rough estimate from engine size, not official groups. Actual costs vary by driver, location, and usage.

Questions about the 2021 Hyundai i30 Premium MHEV T-Gdi

Is the 2021 Hyundai i30 Premium MHEV T-Gdi reliable?

Good reliability. Occasional issues but generally solid. 85% of MOT tests on 2021 Hyundai i30 Premium MHEV T-Gdis ended in a pass, from 191 tests (DVSA MOT data for tests in 2024, retests included). That's 3 points above the average of 82% across all models in the same data.

How much does a 2021 Hyundai i30 Premium MHEV T-Gdi cost to run?

Our estimate is £1,780 a year (£148 a month): £1,175 fuel, £200 road tax, £55 MOT and £350 predicted repairs, based on 7,400 miles a year. Insurance is not included.

What is the MOT pass rate for a 2021 Hyundai i30 Premium MHEV T-Gdi?

85% of 191 MOT tests on the 2021 Hyundai i30 Premium MHEV T-Gdi ended in a pass (DVSA MOT data for tests in 2024, retests included). That ranks it 3074th of 3,336 models first registered in 2021 (bottom 8%).

What is the average mileage for a 2021 Hyundai i30 Premium MHEV T-Gdi?

The average mileage recorded at MOT tests on the 2021 Hyundai i30 Premium MHEV T-Gdi is 22,598 miles, which is in line with the expected 22,200 miles for a 3-year-old car, suggesting normal everyday use.