Audi A3 S Line 30 TDI
Reliability, estimated running costs, and MOT data across 2 model years from 689 MOT tests in 2024.
Avg Pass Rate
91%
Total Tests
689
Highest Pass Rate
2020 (92%)
Years Covered
2
About the Audi A3 S Line 30 TDI
The Audi A3 S Line 30 TDI was MOT tested 689 times in 2024 (DVSA data, retests included) across 2 model years (2020 to 2021), with an average pass rate of 91%. That's comfortably above the average of 82% across all models in our data. Our records list diesel versions.
Best and Worst Years
Of the years with at least 100 tests, the 2020 model has the highest pass rate at 92% from 219 tests. The 2021 model has the lowest at 89%. With just a 3 point gap, pass rates are similar across these years. Newer cars usually pass more often simply because they are younger.
Mileage Across Years
The oldest model in our data (2020) averages 45,665 miles, while the newest (2021) averages 39,098 miles.
Estimated Running Costs
Based on 7,400 miles/year, average pump prices of 174.57p petrol and 199.33p diesel (GOV.UK weekly road fuel prices, week of 19 October 2026), and MOT pass rate data. Insurance not included.
Full 2021 detailsHow reliable is the Audi A3 S Line 30 TDI?
Audi A3 S Line 30 TDI by Year
Click any year to see detailed running costs, reliability data, and comparisons with similar cars.
Questions about the Audi A3 S Line 30 TDI
Is the Audi A3 S Line 30 TDI reliable?
Across its 2 model years in our data (2020 to 2021), the Audi A3 S Line 30 TDI averages a 91% MOT pass rate, from 689 tests (DVSA MOT data for tests in 2024, retests included). That's 9 points above the average of 82% across all models in the same data. The 2020 model has the highest pass rate of the years with at least 100 tests, at 92%.
Which year Audi A3 S Line 30 TDI has the best MOT pass rate?
Of the years with at least 100 tests, the 2020 Audi A3 S Line 30 TDI has the highest MOT pass rate at 92%, while the 2021 model has the lowest at 89%, a 3 point gap. Newer cars usually pass more often simply because they are younger, so compare years of a similar age.
Audi A3 S Line 30 TDI Guides & Articles
Petrol vs Diesel in 2026: Which Actually Costs Less to Own?
8 min read
Buying GuideCars That Lose Value Fastest: Models to Avoid for Depreciation
8 min read
Buying GuideIs an Extended Car Warranty Worth It? UK Guide for 2026
8 min read
Buying GuideFord Fiesta Common Problems (2026): What to Check Before Buying
13 min read
ReliabilityFord Puma Common Problems: 7 Issues That Could Cost £1,500+ (2026)
13 min read
Checking a specific Audi A3 S Line 30 TDI?
Enter the reg plate to see its individual MOT history, mileage verification, and predicted costs.