2005 JAGUAR X-TYPE2.1L DIESEL

The plastic sill covers trap moisture and road salt, leading to terminal rust that is hidden from view until it fails an MOT.

The transfer box on 2.5 and 3.0 AWD models holds very little oil and has no service interval, leading to bearing failure.

The plastic thermostat housing on the Duratec V6 engines becomes brittle from heat cycling and cracks, leading to coolant loss. The leak typically starts as a slow seep but can progress to a steady drip or spray, risking overheating if not caught early.