BMW M4.
What to Check Before Buying.

The BMW M4 is a high-performance coupe powered by a twin-turbocharged straight-six engine, delivering serious pace and driver engagement. It's a car that attracts enthusiasts who want track-day capability alongside daily usability, but it comes with the running costs and maintenance demands you'd expect from an M car. Buyers need to look closely at service history, previous ownership patterns, and signs of hard use, as these cars can be driven hard and modified.

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