2016 BMW 420 2.0L Petrol · DL16 NLA

The most recent MOT test on 2025-11-04 resulted in a clean pass with no defects recorded, marking a positive turnaround following a series of issues that led to a failure in 2023. Prior to this, the vehicle had exhibited recurring advisories, particularly around tyre damage, exhaust noise, and brake wear, which collectively suggest a period of either under-maintenance or higher-than-average usage stress. However, the absence of any failures or major defects in the latest test indicates a significant improvement in roadworthiness, though the history of advisories—especially those related to the exhaust system and brakes—remains a cause for concern. The vehicle’s performance during the 2023 failure, with dangerous brake pad wear and an emissions-related major failure, underscores the need for diligent attention to these critical components, particularly if the car has been driven extensively or stored under less-than-ideal conditions. The recorded mileage of 56,437 miles for a vehicle aged approximately ten years represents a relatively low annual usage rate of around 5,644 miles per annum, which is notably below the average for its class. Such low mileage can stem from lighter operational demands, such as long periods of storage or infrequent use, but it also raises questions about potential neglect of consumables and wear items that typically accumulate more quickly under higher mileage. The gap between the 2023 failure and the 2025 MOT suggests there may have been a period of reduced or irregular usage, which could have exacerbated underlying issues like brake pad wear or tyre degradation. However, if the vehicle has been driven regularly but at a slower pace, the wear on components like suspension bushes, seals, and fluid systems may still be manageable, though the risk of hidden corrosion or fluid degradation from prolonged inactivity cannot be entirely discounted. For a prospective buyer, the most pressing concerns stem from the recurring advisories and the 2023 failure, particularly the brake pad thickness and exhaust emissions. Immediate inspection should focus on the brake system: verify that the offside rear brake pads are fully replaced to meet the 1.5 mm minimum thickness requirement, as any remaining wear could lead to reduced braking efficiency or failure under load. Listen for uneven brake pedal travel or a pulsating sensation while braking, which may indicate warped discs or binding calipers, and check for excessive dust or smoke from the rear wheels. The exhaust system’s noisy advisories and the 2023 emissions failure warrant a thorough visual inspection for cracks, leaks, or disconnections, and a test drive to assess for backpressure or unusual noises, such as rattling or hissing. A scan tool can help confirm if the lambda sensor readings were consistent or if there were intermittent issues that could require further diagnostics. Beyond the mechanical concerns, the vehicle’s low mileage profile justifies a more comprehensive physical inspection tailored to its age and usage profile. Given its age, examine the tyres for signs of sidewall cracking or perishing, which can compromise structural integrity and handling, especially if the car has been stored for extended periods. Check the tyre tread depth uniformly across all four tyres, as the advisories from previous MOTs suggest some areas have already reached borderline wear limits. Inspect the battery for signs of corrosion around terminals, a common issue in older vehicles that can lead to poor electrical performance or failure. The 12V battery should be tested for voltage under load, and the alternator should be checked for adequate charging output to prevent drain on the starter or electrical systems. Fluid levels, particularly the engine oil, differential fluid, and brake fluid, should be topped up to manufacturer specifications, as fluids degrade over time regardless of mileage. Finally, verify that the service book or maintenance records are up to date, particularly for the timing belt (if applicable), suspension components, and exhaust system repairs, to ensure no critical intervals have been missed. A thorough drive should also include checking for excessive suspension clunks or uneven ride height, which may indicate worn suspension bushes or coil springs, and verifying that the steering feels responsive without excessive play or binding.