2021 Ford Transit Custom 340LEADER Eblue 2.0L Diesel · RB12 ALE

The mechanical record for this 2021 Transit Custom 340 Leader is broadly reassuring, anchored by two consecutive passes in late 2024 and January 2026 with zero defects recorded on either occasion. The only blemish in the history is a single failure in December 2024, which was resolved within four days at the same test centre, suggesting the work carried out was straightforward rather than indicative of a deeper structural or mechanical concern. Notably, the failure items were entirely consumable in character: a nearside rear tyre with a cut exposing ply or cords and a wiper blade failing to clear the screen effectively. The accompanying advisories on both rear tyres flagging deformation and baldness on the inner and outer edges were effectively addressed before the subsequent pass, which again recorded no defects. There is no pattern of recurring suspension, braking, corrosion or exhaust advisories, which is the more telling indicator of underlying condition for a vehicle of this age and commercial heritage. With 38,035 miles recorded over five years, this Transit Custom is averaging around 7,600 miles per year, which sits squarely within expected parameters for a light commercial vehicle in its class. There are no abnormal gaps in the MOT testing record, no sudden jumps in mileage between tests, and no indication of extended periods off the road, which removes the usual concerns around seized brakes, deteriorated rubber seals, or degraded diesel emissions components that can accompany long lay-ups. The relatively modest annual mileage should mean that major drivetrain wear items such as the dual-mass flywheel, clutch assembly, turbocharger and EGR system remain in early-to-mid life condition, and that the original timing belt service interval is still some way off if the recommended schedule is being followed. That said, the December 2024 tyre advisories merit specific attention during a physical inspection, as the pattern of wear described was concentrated on the inner and outer edges of both rear tyres rather than the centre, which can suggest issues beyond simple age-related wear. On a test drive, pay particular attention to whether the vehicle pulls to one side under braking or exhibits any wandering behaviour at speed, as uneven rear axle loading or worn rear suspension components can contribute to shoulder-edge tyre wear. Listen for any knocking or clonking from the rear over uneven road surfaces, particularly over speed bumps or potholes, which could point to worn leaf spring shackles, rear axle bushes, or dampers. Check that the rear ride height sits level when unladen, as sag on one side can accelerate uneven edge wear. Inspect the rear tyres fitted currently for any signs of feathering or stepped wear across the tread blocks, and verify they are of matching make and correct speed rating for the vehicle. Given the commercial vehicle application, it is also prudent to carry out a thorough check underneath the vehicle, even though no corrosion advisories have been recorded to date. Transit Customs of this vintage are known to develop surface corrosion on the rear axle, brake pipe runs along the chassis rails, and the underbody cross members, so a torch inspection of these areas is worthwhile. On the test drive, listen for any diesel knock on cold start and check for any smoke from the exhaust, as the EcoBlue engine is generally robust but can show EGR or turbo issues at higher mileages. Confirm that the wiper mechanism operates smoothly across the full sweep without smearing, since the recorded failure was specific to clearing effectiveness rather than mechanical operation. Finally, verify that a full service history is present, as consistent oil and filter changes are critical for the long-term health of the EcoBlue engine and its emissions control equipment.