AUDI A4 S LINE 45 TFSI MHEV QUAT SA (2021)
Running costs, common problems, and reliability data based on 46 real MOT tests in 2024.
MOT Pass Rate
93%
Total Tests (2024)
46
Avg Mileage
26,426 mi
Est. Annual Cost
£1,772
Is the 2021 AUDI A4 S LINE 45 TFSI MHEV QUAT SA reliable?
Excellent reliability. Very few MOT failures. That's 11 points above the national average of 82%.
At 3 years old, 93% of AUDI A4 S LINE 45 TFSI MHEV QUAT SAs from 2021 passed their MOT first time in 2024. That's based on 46 tests across the UK. The average mileage at this age is 26,426 miles.
How does the 2021 AUDI A4 S LINE 45 TFSI MHEV QUAT SA compare?
Mileage Analysis
The average 2021 AUDI A4 S LINE 45 TFSI MHEV QUAT SA has 26,426 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 AUDI A4 S LINE 45 TFSI MHEV QUAT SA 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.
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About the 2021 AUDI A4 S LINE 45 TFSI MHEV QUAT SA
The 2021 AUDI A4 S LINE 45 TFSI MHEV QUAT SA is a premium with a 1984cc petrol engine. 46 of these vehicles were MOT tested in 2024, making it a rare model 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 26,426 miles at 3 years old, AUDI A4 S LINE 45 TFSI MHEV QUAT SA owners drive about as much as the UK average.
2021 AUDI A4 S LINE 45 TFSI MHEV QUAT SA 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 A4 S LINE 45 TFSI MHEV QUAT SA?
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 93% pass rate. These cars rarely fail their MOT, so unexpected bills are less likely.
Buying a Used 2021 AUDI A4 S LINE 45 TFSI MHEV QUAT SA
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. Note: with only 46 tests in our data, these figures should be treated as indicative rather than definitive.
Alternatives to the 2021 AUDI A4 S LINE 45 TFSI MHEV QUAT SA
The AUDI A4 S LINE 45 TFSI MHEV QUAT SA 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 (-1%) from 89,653 tests
- NISSAN QASHQAI (2020) 93% pass rate (same) from 52,321 tests
- MINI COOPER (2019) 92% pass rate (-1%) from 52,140 tests
- HYUNDAI TUCSON (2019) 90% pass rate (-3%) from 42,920 tests