2005 Lexus RX400H 3.3L Petrol · KJ55 HCZ

Structural corrosion and recurring component wear form the defining mechanical profile of this twenty-one-year-old sports utility vehicle, which has accumulated an odometer reading of 172,815 miles across its lifespan. The historical data reveals a persistent pattern of initial MOT failures followed by rectification, highlighted by major structural corrosion defects in 2022 that required substantial remedial work before passing. While the vehicle successfully secured a pass on its most recent test dated 2023-04-19 after addressing lighting faults, the underlying trend points to chronic aging across its load-bearing architecture rather than a stable, trouble-free roadworthiness record. Accumulating approximately 8,229 miles annually, the vehicle's mileage accumulation rate sits at a typical average for a large-capacity family vehicle of this era. This steady deployment means the mechanical subframes, hybrid drivetrain components, and heavy suspension assemblies have experienced continuous operational loading rather than damaging periods of prolonged storage. However, the high cumulative mileage combined with its age means that fatigue in rubber bushes, damping elements, and metallic joints is entirely expected and demands thorough physical inspection. Prospective buyers must prioritise a rigorous physical inspection of the underbody, focusing specifically on the front and rear subframes, sills, and integral body structure, all of which have been repeatedly flagged for corrosion in recent test records. During the pre-purchase inspection, look closely for flaking metal or structural weakening in the prescribed areas where previous excessive corrosion was noted, ensuring no hidden structural degradation compromises the chassis integrity. Furthermore, verify the condition of the steering column top bearing, which was recorded as slightly worn, by checking for excessive play or looseness when rocking the steering wheel from side to side while stationary. On the test drive, listen carefully for knocks, clunks, or rattles originating from the suspension corners, particularly paying attention to the offside rear anti-roll bar pin or bush which was previously noted as worn. Navigate over rough road surfaces and speed humps to detect any wandering, excessive body roll, or vague steering response that would indicate advanced wear in the suspension mounting points. Finally, thoroughly inspect the operation of all exterior lighting, including the position lamps and registration plate units which caused recent test failures, and ensure the hybrid powertrain transitions smoothly between petrol and electric modes without hesitation or warning illuminations on the dashboard.