BMW 5 Series 540i.
What to Check Before Buying.

The BMW 5 Series 540i suits buyers seeking executive comfort with genuine performance credentials, delivering 340bhp from its smooth 3.0-litre straight-six petrol engine. This variant appeals to driving enthusiasts who want a more engaging experience than diesel alternatives while maintaining the 5 Series' renowned refinement and technology. The 540i offers excellent straight-line performance and that characteristically silky BMW six-cylinder soundtrack, though fuel economy typically sits between 30-35mpg in real-world driving, making it less economical for high-mileage users. When inspecting a used 540i, check the service history meticulously as these engines need regular oil changes to maintain reliability. Examine the ZF eight-speed automatic gearbox for smooth shifts without hesitation. Listen for any timing chain noise on cold starts, particularly on earlier examples. Verify that all xDrive all-wheel-drive components function correctly if fitted, and ensure the adaptive suspension operates without fault codes. A comprehensive inspection through Folt can reveal hidden issues before purchase, helping you avoid costly repairs on this premium executive saloon.

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