BMW 5 Series 528i.
What to Check Before Buying.

The BMW 5 Series 528i strikes an appealing balance for UK buyers seeking executive comfort without the running costs of larger six-cylinder models. This four-cylinder petrol variant suits professionals who cover moderate annual mileage and want a premium badge with respectable performance and better fuel economy than the 530i or 535i. The 528i delivers smooth, refined power adequate for motorway cruising, though enthusiast drivers may find it lacks the punch associated with the 5 Series badge. When inspecting used examples, pay particular attention to the timing chain, which can stretch prematurely on higher mileage cars, causing a rattling noise on cold starts. Check for complete service history showing regular oil changes, as this significantly affects engine longevity. Examine the automatic gearbox for smooth shifts without hesitation, and inspect for oil leaks around the valve cover gasket. Verify that all electronic systems function correctly, including the iDrive system and parking sensors, as electrical faults can prove costly to rectify on older models.

The average used car has 3+ known model faults the seller won't mention.