2005 Lexus GS300 3.0L Petrol · 20 ND

The 2005 Lexus GS300 presents a broadly stable mechanical picture, though the most recent MOT on 8 December 2025 at 113,103 miles introduces early structural corrosion concerns that warrant close attention. The vehicle passed, but the tester flagged corrosion to both inner sills and the rear sub-frame, alongside general corrosion on suspension components. None of these were deemed seriously weakened at the time of test, yet their appearance after four consecutive clean passes from 2021 to 2024 suggests a developing trend rather than a long-standing issue. The maintenance trajectory is therefore shifting from stable to one requiring monitoring. Mileage accumulation tells a consistent story of light use. The car covered roughly 6,837 miles between September 2021 and November 2022, then 5,520 miles to November 2023, and 6,837 miles again to December 2024. The jump from 106,999 miles in December 2024 to 113,103 miles in December 2025 represents just 6,104 miles over twelve months, confirming the low annual pattern of around 5,400 miles across its twenty-one-year life. There are no suspicious gaps or sudden spikes in the record. Annual testing has been maintained without interruption since at least 2021, which speaks to regular use rather than prolonged standing, though the corrosion findings indicate the car may have been stored or driven in conditions that promote moisture ingress. The December 2025 advisories on inner sill corrosion and rear sub-frame corrosion are the key items for any prospective buyer to examine in person. Inner sill corrosion can progress rapidly once it establishes, and a buyer should have the sills and sub-frame probed to confirm structural integrity has not deteriorated since the test. Suspension components were also noted as slightly corroded, so coil springs, lower arms, and anti-roll bar links should be inspected for pitting or section loss. The rear brake pads were flagged as wearing thin in the December 2024 test, meaning they have likely been replaced since, but a buyer should verify the condition of rear discs and pads along with the front braking system. The headlamp lens product noted in 2025 may have been a temporary film or treatment, but both headlamps should be checked for clarity and correct aim. Given the age and the emerging corrosion pattern, an underbody inspection by a qualified technician is strongly recommended before purchase.