SEAT Leon SE Dynamic TDI (2021)

Estimated running costs and MOT pass rates from 227 MOT tests in 2024.

Annual Cost

£2,002

£167/month

MOT Pass Rate

89%

Good

Road Tax

£200

Standard rate/year

Est. Insurance

Grp 18-32

1968cc Diesel

Solid Option

89% pass rate, £2,002/year to run. 7 points above average.

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Diesel1968cc5 years old227 tests54k miles avg

Annual Running Costs

Fuel (Diesel, 1968cc)

~48 mpg

£1,397

Road Tax

Standard rate (from April 2017)

£200

MOT Test

£55

Predicted Repairs

£350

Total per year£2,002

Per month£167/mo

Per week£39/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

89% MOT pass rate(Good)

0%All-model avg: 82%100%

Good reliability. Occasional issues but generally solid. That's 7 points above the average of 82% across all models in our data. It also outperforms the SEAT brand average of 85%.

89% of MOT tests on SEAT Leon SE Dynamic TDIs from 2021 ended in a pass in 2024, when they were about 3 years old. That's based on 227 tests across the UK, retests included. The average mileage recorded at those tests was 54,289 miles.

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How Does It Compare?

Rank among 2021 models2688th of 3,336(bottom 20%)

Rank among SEAT models147th of 310(top half)

vs average of all models+7%(82% avg)

vs 2021 models average-3%(92% avg)

vs SEAT average+4%(85% avg)

Mileage Analysis

54,289

Average miles

22,200

Expected for age

The average 2021 SEAT Leon SE Dynamic TDI had 54,289 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

Ford Focus

2019 · 1499cc Diesel

£1,824/year

89%

same

Ford Kuga

2019 · 1997cc Diesel

£1,852/year

91%

+2%

Volkswagen Polo

2019 · 1598cc Diesel

£1,824/year

89%

same

Kia Sportage

2019 · 1598cc Diesel

£1,824/year

89%

same

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About the 2021 SEAT Leon SE Dynamic TDI

The 2021 SEAT Leon SE Dynamic TDI is a family car. Our records list a 1968cc diesel engine, though engines vary between versions. 227 MOT tests were recorded on this model in 2024, making it a less common model in the UK market. It sits in the bottom 20% of 2021 models for MOT pass rate.

With an average of 54,289 miles recorded at its 2024 MOT tests, SEAT Leon SE Dynamic TDI owners cover more miles than the average driver. High-mileage examples should be checked carefully for wear on suspension, brakes, and drivetrain components.

2021 SEAT Leon SE Dynamic TDI Fuel Costs

The 1968cc diesel engine offers a reasonable balance between performance and economy. Expect around 48 mpg in mixed driving, which works out to roughly £1,397 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). Diesel cars of this age should have their DPF (diesel particulate filter) checked, as replacements can be costly.

What does it cost to own a 2021 SEAT Leon SE Dynamic TDI?

Total estimated annual running cost is £2,002 (£167/month), broken down as £1,397 fuel, £200 road tax, £55 MOT, and £350 predicted repairs. Repair costs are moderate, reflecting the 89% pass rate. Keeping on top of servicing will help avoid surprises.

Buying a Used 2021 SEAT Leon SE Dynamic TDI

At 5 years old, the SEAT Leon SE Dynamic TDI 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.

DPF (Diesel Particulate Filter)

Watch out

Short journeys clog the DPF. Replacement costs £1,000-£2,500. Check the DPF warning light and ask about driving patterns.

Turbo Wear

Medium risk

Diesel turbos work harder and wear faster. Listen for whining noises and check for oil leaks around the turbo housing.

AdBlue System

Medium risk

Post-2015 diesels use AdBlue for emissions. Sensor failures and tank heater issues are common. Budget £200-£500 for repairs.

EGR Valve

Low risk

Exhaust Gas Recirculation valves clog with carbon deposits, causing rough running and poor economy. Cleaning costs £150-£300, replacement £300-£600.

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 SEAT Leon SE Dynamic TDI 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
SEAT Leon SE Dynamic TDI(2021)	89%	£1,397	£200	Grp 18-32	£2,002
Ford Focus(2019)	89%	£1,219	£200	Grp 12-25	£1,824-£178
Ford Kuga(2019)	91%	£1,397	£200	Grp 18-32	£1,852-£150
Volkswagen Polo(2019)	89%	£1,219	£200	Grp 12-25	£1,824-£178
Kia Sportage(2019)	89%	£1,219	£200	Grp 12-25	£1,824-£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 SEAT Leon SE Dynamic TDI

Is the 2021 SEAT Leon SE Dynamic TDI reliable?

Good reliability. Occasional issues but generally solid. 89% of MOT tests on 2021 SEAT Leon SE Dynamic TDIs ended in a pass, from 227 tests (DVSA MOT data for tests in 2024, retests included). That's 7 points above the average of 82% across all models in the same data.

How much does a 2021 SEAT Leon SE Dynamic TDI cost to run?

Our estimate is £2,002 a year (£167 a month): £1,397 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 SEAT Leon SE Dynamic TDI?

89% of 227 MOT tests on the 2021 SEAT Leon SE Dynamic TDI ended in a pass (DVSA MOT data for tests in 2024, retests included). That ranks it 2688th of 3,336 models first registered in 2021 (bottom 20%).

What is the average mileage for a 2021 SEAT Leon SE Dynamic TDI?

The average mileage recorded at MOT tests on the 2021 SEAT Leon SE Dynamic TDI is 54,289 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.