Cost to own
BMW 340i Ownership Costs UK
Around £534 per month to own
The BMW F30 340i is widely regarded as one of the best all-round performance saloons BMW has produced. Powered by the highly respected B58 turbocharged six-cylinder engine, it combines strong performance, everyday comfort and surprising long-distance usability. However, buyers should remember that fuel, insurance, maintenance and depreciation can significantly increase the true cost of ownership.
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 340i expensive to run?
A BMW 340i is likely to cost around £534 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 340i costsBMW 340i ownership cost breakdown
Fuel costs
Fuel costs are one of the biggest running expenses for a BMW 340i. Although the B58 engine can return respectable motorway fuel economy, it remains a powerful 3.0-litre petrol engine. Drivers covering high mileage or regularly enjoying the performance available should expect noticeably higher fuel bills than mainstream family cars.
Insurance costs
Insurance costs are typically higher than a standard 3 Series because of the 340i's performance and value. Driver age, postcode, claims history and modifications all affect premiums significantly.
Maintenance costs
Maintenance costs are generally reasonable for a six-cylinder performance BMW but remain higher than a standard diesel model. Tyres, brakes and routine servicing can add up quickly, particularly on cars that have been driven enthusiastically or modified.
Depreciation
Depreciation is often one of the largest ownership costs. While the B58-powered 340i has held its value relatively well, age, mileage and market conditions still affect resale values significantly.
Is the BMW 340i reliable?
The F30 340i benefits from BMW's B58 engine, which has earned a strong reputation among enthusiasts for both performance and reliability. Many owners consider it one of BMW's most robust modern turbocharged petrol engines. Routine maintenance remains critical. Cars that receive regular oil changes and proper servicing tend to provide trouble-free ownership. Neglected examples can become expensive quickly, particularly if previous owners have delayed maintenance or used poor-quality parts. Like any ageing premium performance car, wear items eventually become a factor. Suspension components, batteries, cooling system parts and brake components all require attention as mileage increases. Modified examples should be inspected carefully, as tuning quality varies considerably. Overall, the F30 340i is considered one of the safest used performance BMW purchases available, provided buyers prioritise condition and service history over simply finding the cheapest example on the market.
Real-world fuel economy
Real-world fuel economy depends heavily on how the 340i is used. Motorway journeys can return surprisingly respectable figures for a six-cylinder performance saloon, while urban driving and enthusiastic acceleration can quickly reduce efficiency. Many owners see fuel economy in the low-to-mid 30 mpg range during mixed driving. This places the 340i in a relatively strong position compared with many performance rivals of similar age and power. Drivers covering high annual mileage should still budget carefully, as fuel costs can become substantial over several years. The difference compared with a diesel alternative such as the 330d can amount to thousands of pounds over a typical ownership period.
Common ownership costs
Tyres, brakes and servicing represent the most common ownership expenses. Premium tyres are essential to maintain the balance and performance the car is known for. Brake maintenance can also become expensive as the vehicle ages. Owners should budget for discs, pads and fluid changes alongside routine servicing. Depreciation often exceeds maintenance costs over several years, particularly for higher-mileage examples. Insurance is another notable expense, especially for younger drivers and modified vehicles.
Should you buy a BMW 340i?
The BMW 340i is an excellent choice for drivers seeking a balance of performance, comfort and practicality. It delivers much of the experience of more focused performance cars while remaining comfortable enough for everyday use. Buyers should prioritise service history, maintenance records and overall condition rather than mileage alone. A well-maintained higher-mileage example is often a better purchase than a neglected low-mileage car. For many enthusiasts, the F30 340i represents one of the best-value performance BMWs currently available on the used market.
Calculate your own 340i costsBMW 340i running costs FAQs
Is a BMW 340i expensive to run?
The BMW 340i is more expensive to run than a standard 3 Series due to fuel, insurance and maintenance costs, but remains relatively affordable compared with many performance cars.
Is the B58 engine reliable?
The B58 engine is generally regarded as one of BMW's most reliable modern engines when serviced correctly.
What MPG does a BMW 340i get?
Most owners achieve fuel economy in the low-to-mid 30 mpg range during mixed driving.