DACIA LOGAN MCV SWAY SE TWENTY B-DCI (2021)
Running costs, reliability data, and common problems from 110 real MOT tests.
Annual Cost
£1,355
£113/month
MOT Pass Rate
90%
Excellent
Road Tax
£195
Flat rate/year
Insurance
Grp 12-25
1461cc Diesel
Great Choice
90% pass rate, £1355/year to run. 8 points above average.
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Annual Running Costs
~55 mpg
Flat rate (post-2017)
Low estimate due to excellent reliability
Based on 7,400 miles/year (UK average), current fuel prices, and repair likelihood from MOT data. Insurance not included.
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Reliability Verdict
Excellent reliability. Very few MOT failures. That's 8 points above the national average of 82%.
At 5 years old, 90% of DACIA LOGAN MCV SWAY SE TWENTY B-DCIs from 2021 passed their MOT first time in 2026. That's based on 110 tests across the UK. The average mileage at this age is 28,405 miles.
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How Does It Compare?
Mileage Analysis
28,405
Average miles
37,000
Expected for age
The average 2021 DACIA LOGAN MCV SWAY SE TWENTY B-DCI has 28,405 miles on the clock, which is below the expected 37,000 miles for a 5-year-old car. This suggests lighter use than average, which generally means less wear on major components.
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DACIA LOGAN MCV SWAY SE TWENTY B-DCI by Year
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About the 2021 DACIA LOGAN MCV SWAY SE TWENTY B-DCI
The 2021 DACIA LOGAN MCV SWAY SE TWENTY B-DCI is a small family car with a 1461cc diesel engine. 110 of these vehicles were MOT tested in 2026, making it a rare model on UK roads. It sits in the bottom 77% of 2021 cars for MOT pass rates.
With an average of 28,405 miles at 5 years old, DACIA LOGAN MCV SWAY SE TWENTY B-DCI owners tend to use this car less than the typical driver.
2021 DACIA LOGAN MCV SWAY SE TWENTY B-DCI Fuel Costs
The 1461cc diesel engine offers a reasonable balance between performance and economy. Expect around 55 mpg in mixed driving, which works out to roughly £905 per year at current diesel prices of 148p per litre (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 DACIA LOGAN MCV SWAY SE TWENTY B-DCI?
Total estimated annual running cost is £1,355 (£113/month), broken down as £905 fuel, £195 road tax, £55 MOT, and £200 predicted repairs. The low repair estimate reflects the excellent 90% pass rate. These cars rarely fail their MOT, so unexpected bills are less likely.
Buying a Used 2021 DACIA LOGAN MCV SWAY SE TWENTY B-DCI
At 5 years old, the DACIA LOGAN MCV SWAY SE TWENTY B-DCI 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
Based on the 2021 DACIA LOGAN MCV SWAY SE TWENTY B-DCI's fuel type, age, and engine size, these are the most likely problem areas to check.
DPF (Diesel Particulate Filter)
Watch outShort journeys clog the DPF. Replacement costs £1,000-£2,500. Check the DPF warning light and ask about driving patterns.
Turbo Wear
Medium riskDiesel turbos work harder and wear faster. Listen for whining noises and check for oil leaks around the turbo housing.
AdBlue System
Medium riskPost-2015 diesels use AdBlue for emissions. Sensor failures and tank heater issues are common. Budget £200-£500 for repairs.
EGR Valve
Low riskExhaust Gas Recirculation valves clog with carbon deposits, causing rough running and poor economy. Cleaning costs £150-£300, replacement £300-£600.
Service History
Low riskAlways 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 DACIA LOGAN MCV SWAY SE TWENTY B-DCI stacks up against similar cars for annual running costs, insurance, and tax.
| Car | Pass Rate | Fuel/yr | Tax/yr | Insurance | Total/yr |
|---|---|---|---|---|---|
| DACIA LOGAN MCV SWAY SE TWENTY B-DCI(2021) | 90% | £905 | £195 | Grp 12-25 | £1355 |
| FORD FOCUS(2019) | 89% | £905 | £190 | Grp 12-25 | £1500+£145 |
| MERCEDES A(2019) | 91% | £905 | £190 | Grp 12-25 | £1350-£5 |
| VOLKSWAGEN POLO(2019) | 89% | £905 | £190 | Grp 12-25 | £1500+£145 |
| KIA SPORTAGE(2019) | 89% | £905 | £190 | Grp 12-25 | £1500+£145 |
Estimates based on 7,400 miles/year, current fuel prices, and MOT data. Insurance groups are indicative. Actual costs vary by driver, location, and usage.
Related Dacia Models
Explore other Dacia cars or similar models in the same category.
DACIA SANDERO
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DACIA DUSTER
2019 · 1598cc Petrol
DACIA LOGAN
2015 · 1461cc Diesel
FORD FOCUS
2019 · 1499cc Diesel
MERCEDES A
2019 · 1461cc Diesel
VOLKSWAGEN POLO
2019 · 1598cc Diesel
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