2012 BMW 5 Series 2.0L Diesel · MT62 GHK

The 2.0-litre diesel 520d is one of the more economical 5 Series variants, with real-world fuel economy typically in the 45-55 mpg range. Road tax for a 2012 diesel of this size falls in a moderately expensive bracket given current diesel supplement rules, and insurance is likely to sit in group 30-35, which is significant but not extreme for an executive saloon. Servicing at a BMW specialist rather than a main agent can keep costs down, but expect annual maintenance of £500-£900 for routine items.

Estimated annual running costs, including fuel, tax, insurance, and routine maintenance, are likely to fall in the £2,400-£3,000 range for a vehicle of this age. With very high mileage already accrued, expect larger-ticket items such as suspension bushes, anti-roll bar links, and possibly clutch or automatic gearbox service within the next 12-24 months, which could push annual costs above £3,500.

On inspection, pay particular attention to the timing chain area on this N47 engine — listen for a rattle on cold start, which is the classic symptom of chain stretch, and check for oil leaks around the front of the engine and injectors. Inspect the turbocharger for excessive play in the vanes and any signs of blue smoke on boost, both indicators of wear at this mileage. Examine the underbody for corrosion, as diesel 5 Series saloons of this era can develop rust on suspension components and exhaust mounting points.

Referencing the MOT history, brake discs showed wear in the 2022 test at 149,915 miles, so the front and rear discs and pads should be measured for remaining life — budget for replacement if they are near the minimum thickness. The 2023 advisory noted a nail in the nearside rear tyre, which has presumably been addressed, but check that all four tyres are a matching premium brand and have even wear across the axle, as uneven wear can indicate alignment or suspension issues. Finally, check all electronic systems including iDrive functionality, climate control, electric seats, and parking sensors, as repair costs for these can be substantial.