2006 Lexus RX400H 3.3L Hybrid electric · GU56 XPB

The vehicle remains roadworthy but shows a clear trend of worsening structural degradation and deferred suspension maintenance. The most recent test in October 2025 at 131,368 miles revealed significant structural repairs to the offside rear inner suspension component mounting, which required welding repairs covered by underseal. This follows a failure in November 2024 for excessive corrosion reducing structural strength in the same area. While the vehicle passed with these repairs, the presence of underbody corrosion and a corroded exhaust indicates that the integrity of the chassis is actively declining. At 131,368 miles over approximately twenty years, the Lexus has averaged roughly 6,500 miles per year. This low annual mileage is consistent with a light-use vehicle, but the data suggests that low mileage has not translated to rigorous preventative care. Between October 2022 and October 2023, the car covered 5,800+ miles, yet this period saw the emergence of multiple suspension failures and exhaust leaks, indicating that the rubber components and metal brackets are failing due to age and environmental exposure rather than mechanical wear. A buyer must conduct a thorough underbody inspection to verify the quality of the previous sill welding repairs and the extent of the underbody corrosion. The record shows recurring issues with front suspension arm bushes and rear anti-roll bar bushes which have been flagged across three consecutive years, suggesting the entire suspension geometry is nearing the end of its service life. The inner edge wear on the front tyres noted in late 2024 points to persistent wheel alignment issues or worn control arms that should be checked for further play. The braking system requires immediate attention as the October 2025 test flagged thin front brake pads and a damaged rear brake. Although the tester noted the braking system was not adversely affected, the history of surface corrosion on discs and corroded back plates suggests the braking components may be seizing or sitting for long periods. Ensure that the corrosion mentioned on the rear exhaust and disc covers has not progressed to thinning metal or seized pistons, which are common on high-age vehicles with low annual mileage.