Magnetic ride dampers
£800–£3,200
The optional magnetic dampers use a magnetorheological fluid controlled electromagnetically. The seals degrade, the fluid weeps out and the damper stops controlling. They fail one corner at a time and replacements are not notably longer-lived, which is why many owners eventually convert to passive units instead.
Reported at roughly £800 per corner. A full conversion to passive R8 Plus dampers, including the module needed to suppress the resulting error messages, is quoted around £2,700.
Typically bites
Later life rather than a set mileage. Widely reported as an issue on older cars; original dampers on a car of this age are a live question.
Verified against 3 published sources.