Many diesel models (2011–2018) were recalled for leaking Exhaust Gas Recirculation (EGR) coolers , which can pose a fire risk. Verify this has been completed by checking the service history.
In models built before 2015, the timing chain is a known weak point . Listen for a metallic rattling or "shirring" sound from the rear of the engine at idle. buy used bmw 1 series
Inspect for coolant leaks around the turbo O-rings and plastic reservoir, as overheating can lead to catastrophic engine failure. Many diesel models (2011–2018) were recalled for leaking