2005 Lexus RX300 3.0L Petrol · T4 PTD

A recurring point of attention on this 2005 Lexus RX300 is the condition of the off‑side rear brake disc, which was recorded as an advisory in the 2024 MOT and flagged as a failure in the same year’s earlier test, indicating the disc is worn, pitted or scored. The same MOT also highlighted heavy surface corrosion affecting suspension, steering and brake components, a theme that appears in both the 2022 and 2024 records. In addition, a 2022 failure cited insufficient reserve travel on the brake lever, suggesting the hydraulic system may have been marginal at that time. The latest test, dated 5 September 2024, shows a pass but retains the brake‑disc advisory, confirming the issue remains unresolved. The recorded mileage of 122,539 mi over a 21‑year lifespan works out to roughly 5,800 mi per year, which is well below the average annual usage for a vehicle of this age. MOTs are present for three consecutive years (2022, 2023 and 2024) with no significant gaps, indicating the vehicle has been regularly tested despite the low mileage. Lower annual accumulation generally reduces cumulative wear on engine and drivetrain components, but it can also mean longer periods of inactivity that may accelerate surface corrosion, especially where heavy rust has already been noted. When inspecting the braking system, pay particular attention to the off‑side rear disc for measurable thickness loss, deep scoring or uneven surface, and verify that the disc is within the manufacturer’s minimum thickness specification. During a road test, feel for any increase in pedal travel, sponginess or a soft pedal, and listen for metallic squeal or grinding that could indicate disc deterioration. Examine the brake lines and calipers for any signs of surface rust, as heavy corrosion was previously recorded, and check that the hand‑brake engages firmly without excessive lever movement. Given the repeated advisories for heavy surface corrosion on suspension, steering and chassis components, a thorough visual inspection of control arm bushes, subframe welds, steering rack and brake hardware is essential. Look for flaking paint, rust pits or perforation that could compromise structural integrity. On a drive, note any knocking noises over bumps, steering pull to one side, or excessive play in the steering wheel, all of which may signal deteriorated bushings or rusted mounting points. The tyre wear advisory from 2022 points to outer‑edge wear on the front tyres, so verify tyre depth across the tread and assess wheel alignment. Finally, the transmission oil leak advisory warrants checking for oil stains beneath the vehicle and confirming that gearbox oil levels are adequate, as unchecked leaks can lead to reduced lubrication and eventual gearbox wear.