2005 BMW 120 2.0L Petrol · WG05 OSK

The most recent MOT test on the 2005 BMW 120 occurred on 2025-01-31, resulting in a failure with two major defects—one relating to the nearside windscreen wiper’s inadequate clearance and another concerning excessive carbon monoxide emissions during the second fast idle test—and one advisory regarding corroded brake pipe contamination. This failure follows a pattern of recurring issues, particularly in the exhaust system and brake hoses, which have appeared in multiple MOTs over the past six years. While earlier tests in 2023 and 2024 showed only minor advisories, the persistence of these problems—especially the exhaust emissions and brake hose deterioration—suggests a lack of effective maintenance or underlying mechanical wear that has not been addressed. The vehicle’s history also includes multiple instances of minor corrosion to brake hoses and subframe components, indicating potential neglect of routine inspections or fluid checks, which could escalate into more serious failures if ignored. The recorded mileage of 79,385 miles for a vehicle aged approximately 21 years represents a notably low annual usage rate of around 3,780 miles per year, which is unusually low for its age. Such low mileage often correlates with prolonged periods of the vehicle being stationary, which can exacerbate issues like fluid degradation, corrosion from standing, and mechanical binding. For example, brake discs and calipers may develop corrosion or binding if left unused for extended periods, leading to reduced braking efficiency or even failure to clear the rotor entirely. Additionally, engine oils and transmission fluids can degrade over time due to oxidation and moisture ingress, particularly in vehicles that are not driven regularly. The low mileage does not necessarily mitigate the risk of hidden wear, especially in components like the exhaust system, where carbon monoxide emissions failures often indicate catalytic converter or manifold issues that may worsen with time rather than mileage. Given the vehicle’s history of MOT failures and advisories, particularly the recurring brake hose corrosion and exhaust emissions problems, the prospective buyer should prioritise a thorough mechanical inspection before purchase. Focus on the brake system: check for uneven wear on brake discs, which may indicate binding calipers or seized brake cylinders, and listen for any grinding or squeaking noises during braking. The brake hoses should be visually inspected for cracks, bulges, or signs of leakage, and any fluid leaks around the brake master cylinder or calipers should be addressed immediately, as brake failure is a critical safety risk. The exhaust system is another critical area; listen for unusual noises during acceleration, such as rattling or hissing, which could signal loose components or a failing catalytic converter. If the exhaust emissions issues persist, a diagnostic check for engine misfires or catalytic converter failure is essential, as these can lead to costly repairs if ignored. For the buyer, the vehicle’s low annual mileage means it is more susceptible to calendar-based wear, so additional checks are warranted. Inspect the tyres for sidewall cracking or perishing, which can occur even with low mileage if the vehicle has been stationary for prolonged periods. The 12-volt battery should be tested for charge and health, as prolonged disuse can lead to sulphation or corrosion of terminals. The suspension should be examined for signs of corrosion in the subframe or suspension arms, particularly around the rear, where previous advisories were noted. Fluid levels—oil, coolant, brake fluid, and transmission fluid—should be checked and topped up if necessary, with a note on the service history to confirm if any time-based fluid changes were performed. Finally, the bonnet securing mechanism, which failed in 2022, should be inspected for any signs of wear or misalignment, as a loose or binding bonnet can lead to further mechanical stress or safety hazards. If possible, a professional inspection by a qualified BMW specialist is recommended to assess the extent of the exhaust and brake system issues before committing to the purchase.