MERCEDES A (2021)
Running costs, common problems, and reliability data based on 37,477 real MOT tests in 2024.
MOT Pass Rate
94%
Total Tests (2024)
37,477
Avg Mileage
26,277 mi
Est. Annual Cost
£1,772
Is the 2021 MERCEDES A reliable?
Excellent reliability. Very few MOT failures. That's 12 points above the national average of 82%. It also outperforms the MERCEDES brand average of 87%.
At 3 years old, 94% of MERCEDES As from 2021 passed their MOT first time in 2024. That's based on 37,477 tests across the UK. The average mileage at this age is 26,277 miles.
How does the 2021 MERCEDES A compare?
Mileage Analysis
The average 2021 MERCEDES A has 26,277 miles on the clock, which is in line with the expected 22,200 miles for a 3-year-old car, suggesting normal everyday use.
How much does a 2021 MERCEDES A cost to run?
Based on 7,400 miles/year (UK average), current fuel prices, and repair likelihood from MOT pass rate data. Insurance not included.
MERCEDES A by Year
Checking a specific MERCEDES A?
Enter the reg plate to see its individual MOT history, mileage verification, and predicted costs.
About the 2021 MERCEDES A
The 2021 MERCEDES A is a family car with a 1991cc petrol engine. 37,477 of these vehicles were MOT tested in 2024, making it one of the most commonly tested cars on UK roads. Among all cars from 2021, the average MOT pass rate is 92%, and this model beats that benchmark.
With an average of 26,277 miles at 3 years old, MERCEDES A owners drive about as much as the UK average.
2021 MERCEDES A Fuel Costs
The 1991cc petrol engine offers a reasonable balance between performance and economy. Expect around 36 mpg in mixed driving, which works out to roughly £1,327 per year at current petrol prices of 142p per litre (based on 7,400 miles per year).
What does it cost to own a 2021 MERCEDES A?
Total estimated annual running cost is £1,772 (£148/month), broken down as £1327 fuel, £190 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.
MERCEDES A Reliability Trend
Newer MERCEDES As show better MOT pass rates than older ones, with an average improvement of 6 percentage points.
Buying a Used 2021 MERCEDES A
At 3 years old, this is still relatively fresh. You may find examples with remaining manufacturer warranty. Depreciation is slowing but hasn't bottomed out yet. With 37,477 MOT tests in our data, there's strong statistical confidence in these figures.
Alternatives to the 2021 MERCEDES A
The MERCEDES A is actually the most reliable option among similar petrol family cars from this era. Here are comparable petrol cars with similar engines:
- VOLKSWAGEN GOLF (2019) 92% pass rate (-2%) from 89,653 tests
- NISSAN QASHQAI (2020) 93% pass rate (-1%) from 52,321 tests
- MINI COOPER (2019) 92% pass rate (-2%) from 52,140 tests
- HYUNDAI TUCSON (2019) 90% pass rate (-4%) from 42,920 tests