# Seat Mii — Used Car Buying Guide

AutoScout's analysis of the Seat Mii 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/seat-mii

## Verdict

- **Best value year**: 2021
- **Ideal trim**: SE Technology
- **Target mileage**: 30,000–45,000 miles
- **Max previous owners**: 2
- **Target price**: £11,900

## Why this model

The Seat Mii, especially a late-model petrol like a 2021, is a fantastic little city car. It's super compact, making it a breeze to park and navigate tight UK streets. It's also known for being very cheap to run, reliable, and surprisingly fun to drive. While 2021 petrol models are rarer as production shifted to electric, finding one means you're getting one of the last and likely best-maintained examples of this great little car.

## What you should pay

Based on current UK market data (February 2026) for a 2021 Seat Mii 1.0 TSI SE with around 30-45k miles, you should expect to pay around £11,900. Prices can vary slightly based on exact mileage, condition, and specific optional extras, but this is a solid benchmark for a well-maintained example.

## Which trim to buy

The SE Technology trim is usually the sweet spot. It adds some really useful features like alloy wheels, air conditioning, and a better infotainment system with smartphone integration, which makes daily driving much more comfortable without pushing the price too high. It feels a bit more modern and premium than the basic 'S' trim.

## What to check before you buy

- Minor electrical glitches
- Clutch wear on manual gearboxes (check for smooth engagement)
- Water pump issues (shared with VW Up!/Skoda Citigo)
- Potential for rust on older models (less likely on a 2021, but check wheel arches and sills)

## Running costs

Running costs for a petrol Mii are very low. You're looking at around 10-12 pence per mile for fuel (based on 60mpg and £1.45/litre petrol). Road tax (VED) for a 2021 model is £180 per year. Insurance groups are very low, typically 1-5, making it one of the cheapest cars to insure, especially for new drivers. Servicing is also inexpensive.

## Key stats

- **Fuel Type**: Petrol
- **Horsepower**: 60-75 hp
- **Mpg**: 58-62 mpg
- **Reliability Score**: Above average
- **Safety Rating**: 5-star Euro NCAP (2011)

## Trim comparison

| Trim | Price new | Price used | Key features |
| --- | --- | --- | --- |
| S | £9,500 | £10,900 | 14-inch steel wheels; Radio with CD/MP3 player; Aux-in port |
| SE | £10,500 | £11,700 | 14-inch alloy wheels; Air conditioning; Electric front windows |
| SE Technology | £11,500 | £12,300 | 15-inch alloy wheels; Colour infotainment system with smartphone integration (Bluetooth, USB, SD card); DAB radio |

## Depreciation forecast

| Year | Estimated value | Retention |
| --- | --- | --- |
| 2026 | £11,900 | 0% |
| 2027 | £11,200 | 5.9% |
| 2028 | £10,500 | 11.8% |
| 2029 | £9,800 | 17.6% |
| 2030 | £9,100 | 23.5% |

The Seat Mii has already taken its biggest depreciation hit, especially for a late-model petrol. Its strong demand as a reliable and economical city car means it holds its value relatively well compared to larger, more expensive vehicles. Buying a 2021 model now means you're getting a car that will likely see slower depreciation going forward.

Total value lost since new: 23.5%.

## Alternatives to consider

- [Volkswagen Up!](https://autoscout.fyi/cars/volkswagen-up.md)
- [Skoda Citigo](https://autoscout.fyi/cars/skoda-citigo.md)
- [Kia Picanto](https://autoscout.fyi/cars/kia-picanto.md)
- [Hyundai i10](https://autoscout.fyi/cars/hyundai-i10.md)

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