# BMW 7 Series — Used Car Buying Guide

AutoScout's analysis of the BMW 7 Series 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/bmw-7-series

## Verdict

- **Best value year**: 2021
- **Ideal trim**: 730d M Sport
- **Target mileage**: 40,000
–50,000 miles
- **Max previous owners**: 2
- **Target price**: £29,489

## Why this model

The BMW 7 Series is a fantastic choice if you're looking for a lot of luxury, comfort, and advanced technology for your money. When bought used, these cars offer incredible value because they depreciate quite heavily from new. You get a supremely comfortable ride, a powerful yet economical diesel engine (in the 730d), and a cabin packed with features that were cutting-edge just a few years ago. It's a proper executive cruiser, perfect for long journeys or just enjoying a refined drive.

## What you should pay

Based on current UK market data for February 2026, a 2021 BMW 730d M Sport with around 30-50k miles typically sells for around £29,489. Luxury saloons like the 7 Series take a big hit in their first few years, which is great news for used buyers. You're getting a car that cost over £70,000 new for less than half its original price. Prices can vary a bit depending on exact mileage, condition, and optional extras, but this is a solid target.

## Which trim to buy

The 730d M Sport is definitely the sweet spot. The 730d engine is a brilliant balance of power and efficiency, offering smooth acceleration and decent fuel economy for such a large car. The M Sport trim adds a much more aggressive and stylish look with its body kit and larger wheels, making it stand out more than the standard SE. Crucially, it also comes with a sportier interior and often includes desirable features like adaptive suspension, which enhances both comfort and handling. It's the most popular trim, meaning better resale value and more choice on the used market.

## What to check before you buy

- Air suspension faults (can be costly)
- iDrive system glitches
- Electrical gremlins (e.g., sensor failures)
- Minor oil leaks from engine/gearbox
- Wear on interior trim/leather (check for condition)

## Running costs

For a 730d, running costs are reasonable for a car of this calibre. Fuel will be around 25p per mile, assuming 45 mpg and diesel at £1.55/litre. Road tax (VED) for a 2021 model will be around £580 per year due to the luxury car surcharge (for cars over £40k new, for 5 years from the second year of registration, plus the standard rate). Insurance can be on the higher side, typically ranging from £800 to £1,500 annually depending on your personal circumstances. Servicing can be more expensive than a mainstream car, so factor in around £400-£800 per year for routine maintenance.

## Key stats

- **Fuel Type**: Diesel
- **Horsepower**: 265 hp
- **Mpg**: 45-50 mpg
- **Reliability Score**: Good (75%)
- **Safety Rating**: 5-star Euro NCAP (2015)

## Trim comparison

| Trim | Price new | Price used | Key features |
| --- | --- | --- | --- |
| 730d SE | £68,500 | £27,500 | Leather upholstery; Heated front seats; iDrive infotainment system with navigation |
| 730d M Sport | £72,000 | £29,489 | M Sport aerodynamic body styling; 19-inch M light alloy wheels; Sport seats |
| 740d xDrive M Sport | £78,500 | £34,500 | More powerful 3.0L twin-turbo diesel engine; xDrive all-wheel drive system; All M Sport features |

## Depreciation forecast

| Year | Estimated value | Retention |
| --- | --- | --- |
| 2026 | £29,489 | 0% |
| 2027 | £25,950 | 12% |
| 2028 | £23,355 | 10% |
| 2029 | £21,250 | 9% |
| 2030 | £19,550 | 8% |

Buying a 2021 7 Series in 2026 means you're letting someone else take the biggest hit on depreciation. Luxury cars lose a huge chunk of their value in the first 3-5 years. By buying at this age, you're getting a car that's still relatively modern and well-equipped, but at a significantly reduced price. While it will continue to depreciate, the rate slows down considerably, making it a much smarter financial move than buying new or nearly new.

Total value lost since new: 33.7%.

## Alternatives to consider

- [Mercedes-Benz S-Class](https://autoscout.fyi/cars/mercedes-s-class.md)
- [Audi A8](https://autoscout.fyi/cars/audi-a8.md)
- [Lexus LS](https://autoscout.fyi/cars/lexus-ls.md)

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