CarCostCheck

AUDI A3 SPORT 30 TDI (2021)

Running costs, common problems, and reliability data based on 385 real MOT tests in 2024.

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MOT Pass Rate

91%

Total Tests (2024)

385

Avg Mileage

41,230 mi

Est. Annual Cost

£1,482

Is the 2021 AUDI A3 SPORT 30 TDI reliable?

Excellent reliability. Very few MOT failures. That's 9 points above the national average of 82%.

At 3 years old, 91% of AUDI A3 SPORT 30 TDIs from 2021 passed their MOT first time in 2024. That's based on 385 tests across the UK. The average mileage at this age is 41,230 miles.

How does the 2021 AUDI A3 SPORT 30 TDI compare?

Rank among all 2021 cars2297th out of 3,373(top 68%)
Rank among all AUDI models624th out of 1,079(top 58%)
vs national average+9% (82% avg)
vs 2021 cars average-1% (92% avg)
vs AUDI average+1% (90% avg)

Mileage Analysis

The average 2021 AUDI A3 SPORT 30 TDI has 41,230 miles on the clock, which is well above the expected 22,200 miles for a 3-year-old car. Check service history carefully, as high-mileage cars need consistent maintenance to stay reliable.

How much does a 2021 AUDI A3 SPORT 30 TDI 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 A3 SPORT 30 TDI by Year

YearPass RateTestsAvg Mileage
202191%38541,230 mi
202091%15039,758 mi

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About the 2021 AUDI A3 SPORT 30 TDI

The 2021 AUDI A3 SPORT 30 TDI is a premium with a 1968cc diesel engine. 385 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 falls short of that benchmark.

With an average of 41,230 miles at 3 years old, AUDI A3 SPORT 30 TDI owners cover more miles than the average driver. High-mileage examples should be checked carefully for wear on suspension, brakes, and drivetrain components.

2021 AUDI A3 SPORT 30 TDI 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 SPORT 30 TDI?

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 91% pass rate. These cars rarely fail their MOT, so unexpected bills are less likely.

Buying a Used 2021 AUDI A3 SPORT 30 TDI

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 SPORT 30 TDI

The AUDI A3 SPORT 30 TDI is actually the most reliable option among similar diesel premiums from this era. Here are comparable diesel cars with similar engines: