2021 Renault Master ML35 Business DCI 2.3L Diesel · DU71 XBV

The most recent DVSA MOT test for the 2021 Renault Master ML35 Business DCI was conducted on 2025-09-23 and resulted in a clean pass, with no recorded defects. This follows a pattern of consistent MOT results over the past two years, where the vehicle achieved passing grades despite minor issues such as a damaged windscreen and a near-side rear road wheel distortion advisory in 2024-10-17. The only major failure occurred in the same test cycle, specifically a non-functional near-side front upper outline marker lamp, which was rectified prior to the subsequent MOT. This suggests a stable maintenance history, with the vehicle’s roadworthiness being maintained through timely repairs and adherence to regulatory requirements. The recorded mileage of 33,592 miles for a vehicle aged five years represents an annual usage rate of approximately 6,718 miles, which is within the expected range for its class. This figure does not indicate excessive wear beyond typical expectations for a bus of this size, though lower mileage could sometimes reflect periods of prolonged inactivity, which may lead to issues such as standing corrosion in the undercarriage, particularly around wheel arches, exhaust systems, and brake components. Conversely, higher mileage could accelerate wear on consumables like brake pads, suspension bushings, and tyres, but the current mileage does not suggest immediate critical failure points. It is prudent to consider whether the vehicle has been subjected to heavy or frequent use, as this could influence the condition of internal components such as drivetrain seals, engine mounts, and exhaust flex ducts. For a prospective buyer, the most critical areas to inspect during a physical examination include the brake system, suspension, and undercarriage due to the advisory of a slightly distorted near-side rear road wheel. On a test drive, listen for unusual suspension clunks or rattles, particularly around the rear axle, which could indicate worn suspension bushes or damaged coil springs. Check for uneven tyre wear patterns, as this may signal misalignment or steering system issues. The brake system should be tested for smooth operation, with no signs of pulsation or binding, which could indicate warped discs or binding calipers. Inspect the near-side rear wheel for any signs of excessive play or uneven mounting, and verify that the marker lamp failure from the previous MOT has been fully resolved by ensuring the outline lamp is fully functional and securely fitted. Beyond the mechanical checks, the vehicle’s age and mileage warrant attention to several time-sensitive and age-related issues. Given the five-year age, examine the tyre sidewalls for signs of perishing or cracking, which can compromise structural integrity and pose a risk of sudden failure. The 12V battery should be tested for charge retention and overall health, as buses often experience higher electrical demand, leading to potential issues if the battery is aged or the alternator is not functioning optimally. Check the fluid levels and condition of the engine oil, transmission fluid, and coolant, as these fluids degrade over time and should be replaced according to manufacturer recommendations—typically every 60,000 to 100,000 miles or every two to three years, whichever comes first. Additionally, verify that the service book or maintenance records have been updated, particularly for the exhaust system, as catalytic converters and oxygen sensors degrade with age and can fail without prior notice. Finally, consider a professional inspection of the exhaust emissions system, as older vehicles may require adjustments to meet current emissions standards, especially if the vehicle has been in use with varying fuel types or maintenance histories.