Is a leaking front crankshaft oil seal dangerous for UK cars?

A leaking front crankshaft oil seal can be serious, potentially causing engine damage or even fire risks from oil contacting hot components. In UK models like the Ford Focus or Vauxhall Astra, this issue typically occurs due to: 1) Incorrect installation using petroleum-based lubricants instead of specialist compounds, 2) Misalignment during fitting causing uneven pressure on the seal, or 3) Natural ageing of rubber seals in older vehicles. Immediate repair is recommended to prevent costly engine damage and maintain MOT compliance.