AUDI S3 TFSI QUATTRO S-A (2021)
Running costs, common problems, and reliability data based on 3,679 real MOT tests in 2024.
MOT Pass Rate
95%
Total Tests (2024)
3,679
Avg Mileage
25,853 mi
Est. Annual Cost
£1,772
Is the 2021 AUDI S3 TFSI QUATTRO S-A reliable?
Excellent reliability. Very few MOT failures. That's 13 points above the national average of 82%. It also outperforms the AUDI brand average of 90%.
At 3 years old, 95% of AUDI S3 TFSI QUATTRO S-As from 2021 passed their MOT first time in 2024. That's based on 3,679 tests across the UK. The average mileage at this age is 25,853 miles.
How does the 2021 AUDI S3 TFSI QUATTRO S-A compare?
Mileage Analysis
The average 2021 AUDI S3 TFSI QUATTRO S-A has 25,853 miles on the clock, which is in line with the expected 22,200 miles for a 3-year-old car, suggesting normal everyday use.
Best year to buy a AUDI S3 TFSI QUATTRO S-A?
The most reliable year is the 2022 model with a 99% MOT pass rate, while the 2020 model has the lowest at 95%. The 2021 sits between the two at 95%.
How much does a 2021 AUDI S3 TFSI QUATTRO 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 S3 TFSI QUATTRO S-A by Year
Checking a specific AUDI S3 TFSI QUATTRO S-A?
Enter the reg plate to see its individual MOT history, mileage verification, and predicted costs.
About the 2021 AUDI S3 TFSI QUATTRO S-A
The 2021 AUDI S3 TFSI QUATTRO S-A is a premium with a 1984cc petrol engine. 3,679 of these vehicles were MOT tested in 2024, making it a reasonably common sight on UK roads. It ranks in the top 22% of all 2021 cars for reliability.
With an average of 25,853 miles at 3 years old, AUDI S3 TFSI QUATTRO S-A owners drive about as much as the UK average.
2021 AUDI S3 TFSI QUATTRO S-A Fuel Costs
The 1984cc 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 AUDI S3 TFSI QUATTRO S-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 95% pass rate. These cars rarely fail their MOT, so unexpected bills are less likely.
AUDI S3 TFSI QUATTRO S-A Reliability Trend
The AUDI S3 TFSI QUATTRO S-A has maintained consistent MOT pass rates across model years, varying by only 2 percentage points.
Buying a Used 2021 AUDI S3 TFSI QUATTRO 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 2022 model has the highest pass rate at 99%.
Alternatives to the 2021 AUDI S3 TFSI QUATTRO S-A
The AUDI S3 TFSI QUATTRO S-A is actually the most reliable option among similar petrol premiums from this era. Here are comparable petrol cars with similar engines:
- VOLKSWAGEN GOLF (2019) 92% pass rate (-3%) from 89,653 tests
- NISSAN QASHQAI (2020) 93% pass rate (-2%) from 52,321 tests
- MINI COOPER (2019) 92% pass rate (-3%) from 52,140 tests
- HYUNDAI TUCSON (2019) 90% pass rate (-5%) from 42,920 tests