# BMW 6 Series — Used Car Buying Guide

AutoScout's analysis of the BMW 6 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-6-series

## Verdict

- **Best value year**: 2020
- **Ideal trim**: M Sport 630d Gran Turismo
- **Target mileage**: 40,000–50,000 miles
- **Max previous owners**: 2
- **Target price**: £34,000

## Why this model

The BMW 6 Series, specifically the Gran Turismo (G32) for the 2020 model year, is a fantastic choice if you're looking for a luxurious, comfortable, and stylish car that's great for long journeys. It offers a huge amount of space, a high-quality interior, and a smooth, powerful ride. The 630d diesel engine provides a great balance of performance and decent fuel economy for a car of its size, making it a solid all-rounder for UK roads.

## What you should pay

Based on current UK market data (February 2026), a 2020 BMW 630d Gran Turismo M Sport with around 30,000-50,000 miles typically sells for around £34,000. Prices can vary a bit depending on specific options and condition, but this is a good target to aim for. You're getting a lot of luxury and performance for your money, as the initial depreciation hit has already been absorbed by the first owner.

## Which trim to buy

The M Sport trim is definitely the one to go for with the 630d Gran Turismo. It gives you that sporty, aggressive look with the M Sport body kit and larger wheels, which really suits the car's character. Beyond the aesthetics, you often get upgraded suspension, better seats, and a more comprehensive infotainment system, making the driving experience and interior feel much more special than the lower trims, without sacrificing the excellent economy of the 630d engine.

## What to check before you buy

- Diesel Particulate Filter (DPF) issues on diesel models if not driven long distances regularly
- iDrive infotainment system glitches or software updates needed
- Air suspension problems (if fitted, can be expensive to repair)
- Electrical gremlins (e.g., sensors, modules)
- Brake wear, especially on heavier models or those driven hard

## Running costs

For a 2020 BMW 630d Gran Turismo, here's what to expect: Fuel will be around £0.24 per mile (based on ~45 mpg and diesel at £1.50/litre). Road tax (VED) for a car that was over £40,000 new will be £570 per year (£180 standard rate + £390 luxury car supplement) for years 2-6. Insurance will likely be in the £800-£1500+ range annually, depending on your personal circumstances and no-claims bonus.

## Key stats

- **Fuel Type**: Diesel
- **Horsepower**: 265 hp
- **Mpg**: 45-50 mpg (WLTP combined)
- **Reliability Score**: Good, but repairs can be costly when they do arise.
- **Safety Rating**: 5 Stars (Euro NCAP 2017, based on 5 Series)

## Trim comparison

| Trim | Price new | Price used | Key features |
| --- | --- | --- | --- |
| 630d Gran Turismo SE | £48,000 | £30,000 | Leather upholstery; BMW Navigation System; LED headlights |
| 630d Gran Turismo Sport | £52,000 | £32,000 | Sport seats; Larger alloy wheels; Sport steering wheel |
| 630d Gran Turismo M Sport | £56,000 | £34,000 | M Sport body kit; M Sport suspension; M Sport brakes |

## Depreciation forecast

| Year | Estimated value | Retention |
| --- | --- | --- |
| 2026 | £34,000 | 100% |
| 2027 | £29,920 | 88% |
| 2028 | £26,928 | 79% |
| 2029 | £24,500 | 72% |
| 2030 | £22,540 | 66% |

Buying a 3-5 year old luxury car like the 6 Series Gran Turismo means you're letting the first owner take the biggest hit on depreciation. These cars lose a significant chunk of their value in the first few years. By buying used, you get a premium vehicle at a much more accessible price, and while it will continue to depreciate, the curve flattens out, meaning your future losses will be less severe percentage-wise.

Total value lost since new: 33.7%.

## Alternatives to consider

- Audi A7 Sportback
- [Mercedes-Benz CLS](https://autoscout.fyi/cars/mercedes-cls.md)
- [Porsche Panamera](https://autoscout.fyi/cars/porsche-panamera.md)

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