2021 Renault Trucks Master 35 LWB 2.3L Diesel · YY71 OMO

A pattern of administrative and lighting-related defects dominates the MOT history of this Renault Master, with two failures recorded across four tests alongside multiple minor and advisory items concerning registration plate lamps, outline marker lamps, and headlamp beam patterns. The most recent assessment on 29 October 2025 returned a pass, but only after a failure the previous day for parking brake efficiency below requirements and inoperative registration plate and outline marker lamps. The earlier 2024 test sequence followed a similar structure, passing on 5 November 2024 after a 4 November 2024 fail for a windscreen impairing the driver's view, an illuminated engine management indicator, and an incorrectly fitted headlamp bulb. While the vehicle is currently holding a pass, the recurrence of marker and plate lamp failures suggests an underlying electrical or wiring concern that has not been conclusively resolved between tests. The advisory noting a smooth brake pedal on both 2025 entries is a separate concern, indicating potential wear within the pedal pivot or anti-slip surface that should be physically inspected. At 245,888 miles over roughly five years, this Master is accumulating around 49,178 miles annually, an exceptionally high figure for a vehicle of its class and significantly above typical commercial duty cycle averages. This level of annual mileage places sustained mechanical load on the clutch, dual-mass flywheel, turbocharger, injector set, drivetrain mounts, suspension bushes, wheel bearings, and braking components, with consumable replacement intervals considerably shortened compared to lower-mileage examples. No multi-year gaps in testing are recorded, suggesting continuous operational use rather than extended periods of standing, which reduces the likelihood of seized brakes, perished fuel system hoses, or 12V battery degradation from inactivity. However, the combination of commercial-grade mileage and repeated electrical and brake-related advisories warrants the assumption that wear items have been replaced under heavy-use conditions and may be approaching further replacement thresholds. A prospective buyer should focus on the components flagged within the recent record. The 2025 parking brake failure requires a loaded rolling brake test to confirm efficiency, particularly on a gradient, and the offside rear brake pad advisory means the inner and outer pad thicknesses should be physically measured alongside disc wear and caliper slide pin condition. With a smooth brake pedal recorded on consecutive advisories, depress the pedal firmly by hand to confirm the rubber insert remains intact and provides grip, as a worn surface can compromise pedal feel and driver control under emergency braking. Listen for any binding or dragging from the rear calipers during a test drive, which would corroborate the parking brake concern. Check that all registration plate lamps, cab outline marker lamps, and headlamps illuminate correctly, and verify headlamp beam pattern and aim, as a bulb was previously recorded as fitted incorrectly. The earlier engine MIL fault should be investigated via a diagnostic read for stored DTCs, particularly relating to emissions, DPF, or sensor functions, while the windscreen damage should be re-examined for any new stone chips within the driver's swept area. Given the commercial mileage profile and the nature of the recent failures, a thorough inspection of the braking system, electrical lighting circuits, and engine management health is advisable before purchase. Request evidence of recent servicing covering the clutch, flywheel, turbo, injectors, and suspension components, and confirm the timing belt or chain replacement interval has been observed. Pay particular attention during a test drive to clutch slip under load, any hesitation or turbo flutter, steering play or knocking from the front suspension, and uneven braking pull. The current MOT pass should be viewed as a baseline rather than a guarantee, as the pattern of closely spaced fail-to-pass outcomes indicates that defects are being addressed reactively close to test rather than being prevented through consistent maintenance.