AUDI A3 S LINE 30 TFSI MHEV S-A (2021)
Running costs, common problems, and reliability data based on 2,032 real MOT tests in 2024.
MOT Pass Rate
93%
Total Tests (2024)
2,032
Avg Mileage
27,750 mi
Est. Annual Cost
£1,400
Is the 2021 AUDI A3 S LINE 30 TFSI MHEV S-A reliable?
Excellent reliability. Very few MOT failures. That's 11 points above the national average of 82%.
At 3 years old, 93% of AUDI A3 S LINE 30 TFSI MHEV S-As from 2021 passed their MOT first time in 2024. That's based on 2,032 tests across the UK. The average mileage at this age is 27,750 miles.
How does the 2021 AUDI A3 S LINE 30 TFSI MHEV S-A compare?
Mileage Analysis
The average 2021 AUDI A3 S LINE 30 TFSI MHEV S-A has 27,750 miles on the clock, which is above the expected 22,200 miles for a 3-year-old car. Higher-mileage cars often have more motorway miles, which is generally less harmful than stop-start urban driving.
Best year to buy a AUDI A3 S LINE 30 TFSI MHEV S-A?
The most reliable year is the 2020 model with a 95% MOT pass rate, while the 2022 model has the lowest at 87%. The 2021 sits between the two at 93%.
How much does a 2021 AUDI A3 S LINE 30 TFSI MHEV S-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.
AUDI A3 S LINE 30 TFSI MHEV S-A by Year
Checking a specific AUDI A3 S LINE 30 TFSI MHEV S-A?
Enter the reg plate to see its individual MOT history, mileage verification, and predicted costs.
About the 2021 AUDI A3 S LINE 30 TFSI MHEV S-A
The 2021 AUDI A3 S LINE 30 TFSI MHEV S-A is a premium with a 999cc petrol engine. 2,032 of these vehicles were MOT tested in 2024, making it a reasonably common sight 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 27,750 miles at 3 years old, AUDI A3 S LINE 30 TFSI MHEV S-A owners cover more miles than the average driver.
2021 AUDI A3 S LINE 30 TFSI MHEV S-A Fuel Costs
The modest 999cc petrol engine keeps fuel costs low, which is a real advantage for a premium. Expect around 50 mpg in mixed driving, which works out to roughly £955 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 AUDI A3 S LINE 30 TFSI MHEV S-A?
Total estimated annual running cost is £1,400 (£117/month), broken down as £955 fuel, £190 road tax, £55 MOT, and £200 predicted repairs. The low repair estimate reflects the excellent 93% pass rate. These cars rarely fail their MOT, so unexpected bills are less likely.
AUDI A3 S LINE 30 TFSI MHEV S-A Reliability Trend
Older AUDI A3 S LINE 30 TFSI MHEV S-As tend to have better MOT pass rates than newer ones, with an average decline of 5 percentage points across model years.
Buying a Used 2021 AUDI A3 S LINE 30 TFSI MHEV S-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. If you're flexible on year, the 2020 model has the highest pass rate at 95%.
Alternatives to the 2021 AUDI A3 S LINE 30 TFSI MHEV S-A
The AUDI A3 S LINE 30 TFSI MHEV S-A is actually the most reliable option among similar petrol premiums from this era. Here are comparable petrol cars with similar engines:
- FORD FIESTA (2019) 91% pass rate (-2%) from 124,950 tests
- VOLKSWAGEN GOLF (2019) 92% pass rate (-1%) from 89,653 tests
- VAUXHALL CORSA (2019) 88% pass rate (-5%) from 68,639 tests
- MINI COOPER (2019) 92% pass rate (-1%) from 52,140 tests