CarCostCheck

AUDI A5 S LINE 40 TDI MHEV QUAT SA (2021)

Running costs, common problems, and reliability data based on 412 real MOT tests in 2024.

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MOT Pass Rate

96%

Total Tests (2024)

412

Avg Mileage

31,649 mi

Est. Annual Cost

£1,482

Is the 2021 AUDI A5 S LINE 40 TDI MHEV QUAT SA reliable?

Excellent reliability. Very few MOT failures. That's 14 points above the national average of 82%. It also outperforms the AUDI brand average of 90%.

At 3 years old, 96% of AUDI A5 S LINE 40 TDI MHEV QUAT SAs from 2021 passed their MOT first time in 2024. That's based on 412 tests across the UK. The average mileage at this age is 31,649 miles.

How does the 2021 AUDI A5 S LINE 40 TDI MHEV QUAT SA compare?

Rank among all 2021 cars572th out of 3,373(top 17%)
Rank among all AUDI models147th out of 1,079(top 14%)
vs national average+14% (82% avg)
vs 2021 cars average+4% (92% avg)
vs AUDI average+6% (90% avg)

Mileage Analysis

The average 2021 AUDI A5 S LINE 40 TDI MHEV QUAT SA has 31,649 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 A5 S LINE 40 TDI MHEV QUAT SA cost to run?

⛽Fuel (Diesel, 1968cc)
£1,037
🏛️Road Tax
£190
🔧MOT Test
£55
🛠️Predicted Repairs
£200
Total per year£1,482
Per month£124/mo

Based on 7,400 miles/year (UK average), current fuel prices, and repair likelihood from MOT pass rate data. Insurance not included.

AUDI A5 S LINE 40 TDI MHEV QUAT SA by Year

YearPass RateTestsAvg Mileage
202196%41231,649 mi
2020100%4438,733 mi

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About the 2021 AUDI A5 S LINE 40 TDI MHEV QUAT SA

The 2021 AUDI A5 S LINE 40 TDI MHEV QUAT SA is a premium with a 1968cc diesel engine. 412 of these vehicles were MOT tested in 2024, making it a less common model in the UK market. It ranks in the top 17% of all 2021 cars for reliability.

With an average of 31,649 miles at 3 years old, AUDI A5 S LINE 40 TDI MHEV QUAT SA owners cover more miles than the average driver.

2021 AUDI A5 S LINE 40 TDI MHEV QUAT SA 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 A5 S LINE 40 TDI MHEV QUAT SA?

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 96% pass rate. These cars rarely fail their MOT, so unexpected bills are less likely.

Buying a Used 2021 AUDI A5 S LINE 40 TDI 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.

Alternatives to the 2021 AUDI A5 S LINE 40 TDI MHEV QUAT SA

The AUDI A5 S LINE 40 TDI MHEV QUAT SA is actually the most reliable option among similar diesel premiums from this era. Here are comparable diesel cars with similar engines: