2005 Toyota Prius 1.5L Petrol · MM55 HTJ

The latest MOT test for the 2005 Toyota Prius on 2026-09-01 resulted in a clean pass, marking a positive turnaround following a series of recurring issues that had caused multiple failures over the preceding four years. While the vehicle’s recent history shows a notable improvement, the prior failures—particularly the persistent rear brake advisories and exhaust-related major defects—highlight a pattern of wear and potential neglect in critical systems. The nearside rear brake binding, though not excessively severe, indicates a developing problem that could lead to uneven braking performance or premature pad replacement if left unaddressed. The front position lamp failure is a straightforward electrical issue that should be rectified promptly to avoid potential road safety risks during low-light conditions. The recorded mileage of 93,977 miles for a vehicle aged approximately 21 years represents an unusually low annual usage rate of around 4,475 miles per year, which is far below the typical wear-and-tear expectations for its class. Such low mileage often correlates with prolonged periods of stationary use, particularly in the UK climate where vehicles are frequently left in garages or parked for extended periods. This can exacerbate issues like corrosion, particularly in the exhaust system and brake components, as moisture and condensation accelerate rust formation. Additionally, standing for long periods can lead to brake disc corrosion or caliper binding, as seen in the prior MOT advisories, since the friction materials and mechanical linkages may not be cycled regularly. The low mileage also means that consumables like brake pads and fluids may have degraded over time due to age rather than mechanical wear, warranting careful attention to their condition. For the prospective buyer, the most critical areas to inspect during a physical examination and test drive are the rear brakes, exhaust system, and structural integrity of the vehicle. The recurring thin brake pads and pitted discs suggest that the rear braking system has been under significant stress, potentially due to prolonged standing or infrequent use. During a test drive, listen for uneven braking performance, a grinding or squeaking noise when applying the rear brakes, or a binding sensation when pressing the pedal—these could indicate caliper binding or warped discs. The nearside rear brake binding noted in the 2026 MOT advisory may also cause a clunking or rattling sound when the vehicle is in motion, particularly at low speeds. Immediate attention to the rear brakes is advisable, with a recommendation to replace the pads and inspect the discs for further wear or damage. The exhaust system failures, including the insecure heat shield and rear silencer, point to a need for a thorough inspection of the entire exhaust assembly for leaks, corrosion, or structural integrity. Look for rust around the heat shields, particularly under the fuel tank, and check for excessive vibration or unusual noises emanating from the exhaust during acceleration or braking. Beyond the mechanical checks, the vehicle’s age and low mileage make it vulnerable to age-related wear that may not be immediately apparent. The tyre tread depth should be verified, with a focus on the rear tyres, which may have experienced more wear due to the braking issues. Inspect the tyre sidewalls for signs of perishing, cracking, or dry rot, which can compromise structural integrity and lead to sudden failure. The 12-volt battery should be tested for charge retention and overall health, as prolonged disuse can cause deep discharge cycles that shorten its lifespan. Additionally, the vehicle’s fluids—particularly the brake fluid, coolant, and transmission fluid—should be checked for degradation. Brake fluid should be replaced every 2–3 years due to its hygroscopic nature, and coolant should be flushed and refilled to prevent corrosion and overheating. The service history should be reviewed to confirm that routine maintenance, such as oil changes and suspension inspections, has been conducted at the recommended intervals. If the service book is incomplete or missing, a comprehensive mechanical inspection by a qualified technician is strongly advised to address any hidden issues that may have arisen from the vehicle’s low-mileage, high-corrosion-risk profile.