Cost to own
BMW 330d Ownership Costs UK
Around £509 per month to own
The G20 BMW 330d is one of the most complete all-round cars on the used market. It combines strong performance, excellent motorway fuel economy and long-distance comfort in a way that very few rivals can match. While it is cheaper to run than a petrol M340i, ownership costs are still significantly higher than those of a typical family hatchback once fuel, insurance, maintenance and depreciation are taken into account.
Estimated annual ownership cost
Assumptions used
- 8,000 miles per year
- 3 years ownership
- Petrol at £1.50/litre
- Depreciation based on age, mileage, usage and car type
Is the BMW 330d expensive to run?
A BMW 330d is likely to cost around £509 per month over 3 years, based on 8,000 miles per year. The biggest costs are usually depreciation, insurance, fuel and maintenance.
Calculate your own 330d costsBMW 330d ownership cost breakdown
Fuel costs
Fuel is one of the biggest advantages of the BMW 330d. The 3.0-litre six-cylinder diesel engine delivers strong performance while remaining remarkably efficient on long journeys. Drivers covering high annual mileage can often save thousands of pounds in fuel costs compared with equivalent petrol performance cars. However, fuel costs still depend heavily on driving style, journey type and annual mileage.
Insurance costs
Insurance costs for a BMW 330d are usually lower than for performance-focused models such as the M340i, but they remain higher than many mainstream family cars. Premiums depend on driver age, postcode, annual mileage and claims history. The car's performance and value mean buyers should obtain insurance quotes before purchasing rather than relying on generic estimates.
Maintenance costs
Maintenance costs are generally reasonable for a premium six-cylinder diesel saloon, but buyers should still budget appropriately. Servicing, tyres, brakes and age-related repairs can all add up over time. A complete service history is particularly important because modern diesel engines and emissions systems can be expensive to repair if neglected.
Depreciation
Depreciation is one of the largest ownership costs for most BMW 330d owners. While six-cylinder BMW diesels often retain value well among enthusiasts, the car will still lose value as it ages and accumulates mileage. Buyers covering high annual mileage should pay particular attention to depreciation because it can quickly become one of the largest expenses over several years of ownership.
Is the BMW 330d reliable?
The G20 BMW 330d is generally considered one of the more dependable premium diesel cars currently available. Its B57 six-cylinder diesel engine has developed a strong reputation for smoothness, efficiency and long-distance durability when maintained correctly. Like any modern diesel, reliability depends heavily on how the car is used. Drivers who regularly cover motorway miles are less likely to experience problems than owners who mainly use the car for short journeys. Diesel particulate filters, emissions systems and EGR-related components all work best when the car is driven long enough to reach full operating temperature. Routine maintenance is especially important. Regular servicing, quality oil and keeping on top of scheduled maintenance can make a significant difference to long-term ownership costs. Buyers should also check for evidence of gearbox servicing, tyre replacement and brake maintenance. Overall, the G20 330d has a strong reliability record and is often regarded as one of the best choices for drivers who regularly cover significant mileage and want both performance and efficiency.
Real-world fuel economy
Real-world fuel economy is one of the strongest reasons to buy a BMW 330d. On motorway journeys, many owners comfortably achieve fuel economy figures in excess of 50 mpg, while careful long-distance driving can produce even better results. Mixed driving generally delivers fuel economy in the mid-to-high 40s, which is impressive considering the performance available from the six-cylinder diesel engine. Even when driven enthusiastically, the 330d often remains noticeably more efficient than equivalent petrol-powered alternatives. Town driving naturally reduces efficiency, particularly during shorter journeys where the engine and emissions systems have less time to operate efficiently. However, the 330d remains one of the most economical ways to access strong performance in a premium executive saloon. For drivers covering 15,000 to 25,000 miles per year, the fuel savings alone can make a substantial difference to overall ownership costs when compared with petrol alternatives such as the M340i.
Common ownership costs
The most common BMW 330d ownership costs include tyres, servicing, brakes and depreciation. Premium tyres are important because the car produces significant torque and is often used for long motorway journeys where tyre quality has a noticeable impact on refinement and safety. Brake components are another recurring expense. While wear rates depend heavily on driving style, replacement discs and pads are more expensive than those found on mainstream family cars. Owners should also budget for routine servicing and fluid changes throughout ownership. Modern diesel-specific systems can also contribute to costs. Diesel particulate filters, EGR systems and emissions-related components are generally reliable when the car is used correctly, but repairs can be expensive if problems develop. None of these costs are unusual for a premium executive car, but they reinforce the importance of looking beyond fuel economy when assessing the true cost of ownership.
Should you buy a BMW 330d?
The BMW 330d is an excellent choice for drivers who cover significant mileage and want a balance of performance, comfort and efficiency. Few cars combine long-distance refinement, strong overtaking performance and fuel economy as effectively as the G20 330d. It makes particular sense for motorway users, business drivers and anyone regularly travelling long distances. The six-cylinder diesel engine provides effortless performance while keeping fuel costs under control. However, buyers should be realistic about ownership costs. Although cheaper to fuel than a comparable petrol performance car, insurance, maintenance, tyres and depreciation still represent substantial expenses. A diesel also makes less sense if most journeys are short and urban. For many UK drivers, the G20 330d represents the sweet spot in the 3 Series range. It offers much of the pace of an M340i while delivering significantly lower fuel costs, making it one of the strongest all-round used car choices available today.
Calculate your own 330d costsBMW 330d running costs FAQs
Is a BMW 330d expensive to run?
The BMW 330d is more expensive to run than a typical family car, but it is often significantly cheaper to fuel than equivalent petrol performance cars thanks to its excellent fuel economy.
What MPG does a BMW 330d get?
Many owners achieve real-world fuel economy in the mid-to-high 40 mpg range, with motorway driving often exceeding 50 mpg.
Is the BMW 330d reliable?
The BMW 330d is generally regarded as reliable when maintained properly, particularly for drivers who regularly cover longer motorway journeys.