# BYD Seal U — Used Car Buying Guide

AutoScout's analysis of the BYD Seal U 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/byd-seal-u

## Verdict

- **Best value year**: 2025
- **Ideal trim**: Design
- **Target mileage**: 10,000–20,000 miles
- **Max previous owners**: 1
- **Target price**: £26,000

## Why this model

⚠️ Limited UK data — BYD only arrived in the UK in 2024, so we have fewer MOT tests and less resale history than established brands. That said, the BYD Seal U is a strong contender if you're looking for a modern, well-equipped electric SUV. BYD is China's #1 EV brand, selling 1.76 million EVs globally in 2023, which means robust manufacturing and a growing global support network. They offer a fantastic 6-year/150,000-mile warranty, which is much longer than many European rivals and gives great peace of mind. Other BYD models have achieved 5-star Euro NCAP safety ratings, suggesting a strong focus on safety. It's a practical family car with good range and modern tech.

## What you should pay

The current market value for a used BYD Seal U (likely a 2025 model in early 2026) is around £26,000. However, due to limited UK data for this relatively new brand, we apply a wider uncertainty band of ±20%, meaning prices could realistically range from £20,800 to £31,200. The 71.8kWh liquid-cooled battery is a good size, offering a decent WLTP range of 311 miles, and liquid cooling helps maintain battery health, with an expected degradation of only ~1.8% per year. This means good long-term battery performance.

## Which trim to buy

The 'Design' trim hits a sweet spot, offering a great balance of features and value without jumping to the top-tier 'Excellence' price. You'll likely get a good infotainment system, comfortable interior, and essential driver aids without paying extra for features you might not need. It's the most common trim available and offers the best resale potential.

## What to check before you buy

- Software quirks (common with new tech, often fixed with updates)
- Tyre wear (EVs are heavy and have instant torque, check tyre condition)
- Limited long-term UK specific data due to recent market entry

## Running costs

Running an electric car like the Seal U can be very cost-effective, especially if you charge at home. Based on a real-world efficiency of about 3.4 mi/kWh: at a standard home rate (24.5p/kWh), it's about 7.2p/mile, costing around £724 per year for 10,000 miles. If you switch to a smart EV tariff like Octopus Go or Intelligent Octopus (around 9p/kWh overnight), this drops to about 2.7p/mile, costing only £266 per year for 10,000 miles – a saving of £458 annually! Road tax for EVs is free until April 2025, after which it will be £195 per year. Insurance costs will vary but are generally comparable to similar sized SUVs.

## Key stats

- **Fuel Type**: Electric
- **Horsepower**: 218 hp
- **Mpg**: N/A (Electric)
- **Reliability Score**: Excellent (backed by 6yr/150k mile warranty)
- **Safety Rating**: 5-star Euro NCAP (inferred from other BYD models like Seal and Atto 3)

## Trim comparison

| Trim | Price new | Price used | Key features |
| --- | --- | --- | --- |
| Boost | £37,995 | £24,500 | 18-inch alloy wheels; LED headlights; 12.8-inch rotating touchscreen |
| Design | £39,995 | £26,000 | 19-inch alloy wheels; Panoramic sunroof; Heated front seats |
| Excellence | £42,995 | £28,500 | 20-inch alloy wheels; Head-up display; Ventilated front seats |

## Depreciation forecast

| Year | Estimated value | Retention |
| --- | --- | --- |
| 2026 | £26,000 | 100% |
| 2027 | £21,320 | 82% |
| 2028 | £18,762 | 72.2% |
| 2029 | £17,073 | 65.7% |
| 2030 | £16,048 | 61.7% |

The sweet spot for buying a BYD Seal U is likely around 2025-2026, as the initial steep depreciation from new has already occurred. By buying a car that's 1-2 years old, you let the first owner take the biggest hit. The value holds relatively well after the initial drop, making it a more stable investment for the next few years.

Total value lost since new: 38.3%.

## Alternatives to consider

- [MG ZS EV](https://autoscout.fyi/cars/mg-zs-ev.md)
- Skoda Enyaq iV
- Hyundai Kona Electric

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