# Audi A3 — Used Car Buying Guide

AutoScout's analysis of the Audi A3 on the UK used-car market. Backed by 33 million DVSA MOT tests, current AutoTrader pricing, and depreciation curves derived from CAP/Glass's Guide data.

Live interactive report: https://autoscout.fyi/cars/audi-a3

## Verdict

- **Best value year**: 2021
- **Ideal trim**: S Line
- **Target mileage**: 40,000–50,000 miles
- **Max previous owners**: 2
- **Target price**: £15,641

## Why this model

The Audi A3 is a fantastic choice if you're looking for a premium hatchback without breaking the bank. It offers a really refined driving experience, a high-quality interior that feels a step above many rivals, and it's generally quite practical for everyday use. It holds its value well and has a strong image, making it a solid all-rounder.

## What you should pay

Based on current UK market data for February 2026, a 2021 Audi A3 S Line 35 TFSI with around 30-50k miles should realistically be around £15,641. Prices can vary a bit depending on exact mileage, condition, and optional extras, but this is a good target to aim for. Don't be afraid to negotiate, especially if a car has been sitting on a forecourt for a while.

## Which trim to buy

The S Line trim is definitely the sweet spot for the A3. It gives you those sporty looks with more aggressive bumpers, larger alloy wheels, and a lowered suspension, which really enhances the car's appeal. Inside, you get sport seats and S Line badging, making it feel more special than the lower trims, but without the significantly higher running costs of the performance 'S' models. It's the best balance of style, features, and value.

## What to check before you buy

- MMI (infotainment) glitches
- DSG gearbox mechatronics (older models, less common on newer)
- Water pump failures
- Suspension bushes wear

## Running costs

For a petrol 35 TFSI, you can expect around 19-20p per mile in fuel costs based on current petrol prices and realistic MPG. Road tax (VED) for a 2021 model is a flat rate of £190 per year. Insurance will be moderate, but this can vary significantly based on your age, location, and driving history.

## Key stats

- **Fuel Type**: Petrol
- **Horsepower**: 148-150 bhp
- **Mpg**: 32–36 mpg
- **Reliability Score**: Good, but some common electrical issues reported.
- **Safety Rating**: 5 stars (Euro NCAP 2020)

## Trim comparison

| Trim | Price new | Price used | Key features |
| --- | --- | --- | --- |
| Technik | £24,000 | £13,500 | 16-inch alloy wheels; LED headlights; MMI Navigation Plus with 10.1-inch touchscreen |
| Sport | £26,000 | £14,500 | 17-inch alloy wheels; Sport suspension; Sport seats |
| S Line | £28,000 | £15,500 | 18-inch '5-arm dynamic' design alloy wheels; S Line body styling; LED headlights with dynamic rear indicators |

## Depreciation forecast

| Year | Estimated value | Retention |
| --- | --- | --- |
| 2026 | £15,641 | 100% |
| 2027 | £14,546 | 93% |
| 2028 | £13,528 | 86.5% |
| 2029 | £12,446 | 79.6% |
| 2030 | £11,450 | 73.2% |

The Audi A3 generally holds its value well for a premium car, but the steepest depreciation happens in the first few years. Buying a 3-5 year old model like a 2021 car means you've let someone else take the biggest hit. From 2026 onwards, the depreciation curve flattens out, meaning you'll lose less money year-on-year compared to buying new or nearly new. This makes it a smart buy for long-term ownership.

Total value lost since new: 27%.

## Alternatives to consider

- [BMW 1 Series](https://autoscout.fyi/cars/bmw-1-series.md)
- [Volkswagen Golf](https://autoscout.fyi/cars/volkswagen-golf.md)
- [Mercedes-Benz A-Class](https://autoscout.fyi/cars/mercedes-a-class.md)

---

Source: AutoScout (https://autoscout.fyi). Part of a review of the UK used-car market across 500+ models.