Hyundai i30 Premium MHEV CRDI (2021)

Estimated running costs and MOT pass rates from 47 MOT tests in 2024.

Annual Cost

£1,674

£140/month

MOT Pass Rate

94%

Excellent

Road Tax

£200

Standard rate/year

Est. Insurance

Grp 12-25

1598cc Diesel hybrid

Great Choice

94% pass rate, £1,674/year to run. 12 points above average.

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Diesel hybrid1598cc5 years old47 tests45k miles avg

Annual Running Costs

Fuel (Diesel hybrid, 1598cc)

~55 mpg (diesel-engine estimate; hybrids usually use less)

£1,219

Road Tax

Standard rate (from April 2017)

£200

MOT Test

£55

Predicted Repairs

Low estimate due to excellent reliability

£200

Total per year£1,674

Per month£140/mo

Per week£32/wk

Estimates based on 7,400 miles/year (UK average), diesel at 199.33p 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

94% MOT pass rate(Excellent)

0%All-model avg: 82%100%

Excellent reliability. Very few MOT failures. That's 12 points above the average of 82% across all models in our data. It also outperforms the Hyundai brand average of 83%.

94% of MOT tests on Hyundai i30 Premium MHEV CRDIs from 2021 ended in a pass in 2024, when they were about 3 years old. That's based on 47 tests across the UK, retests included. The average mileage recorded at those tests was 44,980 miles.

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How Does It Compare?

Rank among 2021 models1370th of 3,336(top half)

Rank among Hyundai models73rd of 414(top 18%)

vs average of all models+12%(82% avg)

vs 2021 models average+2%(92% avg)

vs Hyundai average+11%(83% avg)

Mileage Analysis

44,980

Average miles

22,200

Expected for age

The average 2021 Hyundai i30 Premium MHEV CRDI had 44,980 miles on the clock at its 2024 MOT, which is well above the expected 22,200 miles for a 3-year-old car. Check service history carefully, as high-mileage cars need consistent maintenance to stay reliable.

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Similar Cars to Consider

Land Rover Discovery Sport R-DYN SE D A

2020 · 1999cc Diesel hybrid

£1,852/year

90%

-4%

BMW 520D M Sport MHEV Auto

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£2,002/year

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-5%

BMW 320D M Sport MHEV Auto

2021 · 1995cc Diesel hybrid

£1,852/year

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Volvo XC90 R-Design B5 MHEV Awd Auto

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About the 2021 Hyundai i30 Premium MHEV CRDI

The 2021 Hyundai i30 Premium MHEV CRDI is a small family car. Our records list a 1598cc diesel hybrid engine, though engines vary between versions. 47 MOT tests were recorded on this model in 2024, making it a rare model on UK roads. Among all models from 2021, the average MOT pass rate is 92%, and this model beats that benchmark.

With an average of 44,980 miles recorded at its 2024 MOT tests, Hyundai i30 Premium MHEV CRDI owners cover more miles than the average driver. High-mileage examples should be checked carefully for wear on suspension, brakes, and drivetrain components.

2021 Hyundai i30 Premium MHEV CRDI Fuel Costs

The 1598cc diesel hybrid engine offers a reasonable balance between performance and economy. Our estimate uses around 55 mpg, the figure for a diesel engine of this size, which works out to roughly £1,219 per year with diesel at 199.33p per litre (GOV.UK weekly average, week of 19 October 2026; based on 7,400 miles per year). As a hybrid it should use less than that, and real-world fuel costs depend a lot on how much electric-only driving you do.

What does it cost to own a 2021 Hyundai i30 Premium MHEV CRDI?

Total estimated annual running cost is £1,674 (£140/month), broken down as £1,219 fuel, £200 road tax, £55 MOT, and £200 predicted repairs. The low repair estimate reflects the excellent 94% pass rate. These cars rarely fail their MOT, so unexpected bills are less likely.

Buying a Used 2021 Hyundai i30 Premium MHEV CRDI

At 5 years old, the Hyundai i30 Premium MHEV CRDI offers good value with plenty of life remaining. Most manufacturer warranties will have expired, so a pre-purchase inspection is worth the cost. Note: with only 47 tests in our data, these figures should be treated as indicative rather than definitive.

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.

Hybrid Battery Health

Medium risk

After 5 years, hybrid battery capacity may have reduced. A full replacement costs £2,000-£4,000, though reconditioning is cheaper at £500-£1,500.

Inverter and Power Electronics

Low risk

The inverter converts DC to AC for the electric motor. Failures are expensive (£1,500+) but relatively rare. Listen for unusual buzzing sounds.

Regenerative Braking

Medium risk

Brake discs can corrode from reduced use (the electric motor handles most braking). Surface rust is normal but deep pitting needs attention.

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 CRDI 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 CRDI(2021)	94%	£1,219	£200	Grp 12-25	£1,674
Land Rover Discovery Sport R-DYN SE D A(2020)	90%	£1,397	£200	Grp 18-32	£1,852+£178
BMW 520D M Sport MHEV Auto(2021)	89%	£1,397	£200	Grp 18-32	£2,002+£328
BMW 320D M Sport MHEV Auto(2021)	91%	£1,397	£200	Grp 18-32	£1,852+£178
Volvo XC90 R-Design B5 MHEV Awd Auto(2021)	90%	£1,397	£200	Grp 18-32	£1,852+£178

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 CRDI

Is the 2021 Hyundai i30 Premium MHEV CRDI reliable?

Excellent reliability. Very few MOT failures. 94% of MOT tests on 2021 Hyundai i30 Premium MHEV CRDIs ended in a pass, from 47 tests (DVSA MOT data for tests in 2024, retests included). That's 12 points above the average of 82% across all models in the same data.

How much does a 2021 Hyundai i30 Premium MHEV CRDI cost to run?

Our estimate is £1,674 a year (£140 a month): £1,219 fuel, £200 road tax, £55 MOT and £200 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 CRDI?

94% of 47 MOT tests on the 2021 Hyundai i30 Premium MHEV CRDI ended in a pass (DVSA MOT data for tests in 2024, retests included). That ranks it 1370th of 3,336 models first registered in 2021 (top half).

What is the average mileage for a 2021 Hyundai i30 Premium MHEV CRDI?

The average mileage recorded at MOT tests on the 2021 Hyundai i30 Premium MHEV CRDI is 44,980 miles, which is well above the expected 22,200 miles for a 3-year-old car. Check service history carefully, as high-mileage cars need consistent maintenance to stay reliable.