AUDI A3 S LINE EDITION 1 35 TDI S-A (2021)
Running costs, common problems, and reliability data based on 884 real MOT tests in 2024.
MOT Pass Rate
94%
Total Tests (2024)
884
Avg Mileage
33,111 mi
Est. Annual Cost
£1,482
Is the 2021 AUDI A3 S LINE EDITION 1 35 TDI S-A reliable?
Excellent reliability. Very few MOT failures. That's 12 points above the national average of 82%. It also outperforms the AUDI brand average of 90%.
At 3 years old, 94% of AUDI A3 S LINE EDITION 1 35 TDI S-As from 2021 passed their MOT first time in 2024. That's based on 884 tests across the UK. The average mileage at this age is 33,111 miles.
How does the 2021 AUDI A3 S LINE EDITION 1 35 TDI S-A compare?
Mileage Analysis
The average 2021 AUDI A3 S LINE EDITION 1 35 TDI S-A has 33,111 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.
How much does a 2021 AUDI A3 S LINE EDITION 1 35 TDI 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 EDITION 1 35 TDI S-A by Year
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About the 2021 AUDI A3 S LINE EDITION 1 35 TDI S-A
The 2021 AUDI A3 S LINE EDITION 1 35 TDI S-A is a premium with a 1968cc diesel engine. 884 of these vehicles were MOT tested in 2024, making it a less common model in the UK market. Among all cars from 2021, the average MOT pass rate is 92%, and this model beats that benchmark.
With an average of 33,111 miles at 3 years old, AUDI A3 S LINE EDITION 1 35 TDI S-A owners cover more miles than the average driver.
2021 AUDI A3 S LINE EDITION 1 35 TDI S-A 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 £1,037 per year at current diesel prices of 148p per litre (based on 7,400 miles per year).
What does it cost to own a 2021 AUDI A3 S LINE EDITION 1 35 TDI S-A?
Total estimated annual running cost is £1,482 (£124/month), broken down as £1037 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.
Buying a Used 2021 AUDI A3 S LINE EDITION 1 35 TDI 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.
Alternatives to the 2021 AUDI A3 S LINE EDITION 1 35 TDI S-A
The AUDI A3 S LINE EDITION 1 35 TDI S-A is actually the most reliable option among similar diesel premiums from this era. Here are comparable diesel cars with similar engines:
- FORD FOCUS (2019) 89% pass rate (-5%) from 93,803 tests
- FORD KUGA (2019) 91% pass rate (-3%) from 72,831 tests
- VOLKSWAGEN POLO (2019) 89% pass rate (-5%) from 65,751 tests
- FORD TRANSIT CUSTOM (2019) 87% pass rate (-7%) from 59,814 tests