2020 SEAT Leon 1.5L Petrol · WN69 WCF

A pattern of rear suspension oil seepage has emerged on this SEAT Leon, with the most recent MOT on 20 August 2026 passing only after both rear shock absorbers were flagged for light oil misting. While a light misting is currently an advisory rather than a failure, the symmetry of the finding on both nearside and offside rear units suggests the dampers are beginning to lose their hydraulic fluid, which is a typical wear progression on a six-year-old vehicle. Prior tests in 2023, 2024, and 2025 recorded no suspension concerns, so this represents a new and worsening issue rather than a chronic long-standing fault. The 2025 January test also captured a cluster of brake and tyre advisories on the nearside rear, indicating that consumable wear was beginning to accelerate on that axle. Overall, the trend is one of a car that has been mechanically tidy for most of its life but is now entering the phase where mid-life consumables and suspension components are starting to demand attention. With 47,251 miles recorded over six years, annual mileage works out at roughly 7,875 miles per year, which is fairly typical for a privately used family hatchback of this age. There are no significant gaps in the MOT testing history, with annual tests consistently recorded from 2023 through to 2026, indicating the vehicle has been in regular use rather than laid up for extended periods. This steady accumulation of miles means the engine, gearbox, clutch, and drivetrain components have experienced continuous working load rather than the particular stresses associated with very short trips or long periods of inactivity. Brakes, tyres, and suspension wear at this mileage should be broadly in line with manufacturer service schedules, and there is no evidence of the rapid mileage escalation that can sometimes mask accident damage or clock-related irregularities. For a prospective buyer, the rear shock absorbers should be the primary focus of any test drive. Listen for clonking or knocking noises from the rear axle when traversing speed humps or uneven road surfaces, and pay particular attention to any feeling of floatiness, excessive body roll through corners, or a noticeable lack of damping after a series of bumps, as this would suggest the misting has progressed beyond a cosmetic issue. Inspect the rear shock bodies and surrounding underbody area for fresh oil residue or wetness, and check for any uneven tyre wear across the rear axle which can indicate damping inefficiency. Given that the brake pads on the nearside rear were noted as wearing thin in early 2025, verify the current pad and disc condition on that corner, listening for any binding caliper symptoms such as a pulling sensation under braking or a hot rear wheel hub after driving. The tyre advisories from January 2025 flagged inner-edge wear on the nearside front, which is commonly associated with alignment issues rather than simple tyre ageing, so it would be prudent to check the current tracking and camber settings, particularly if uneven wear has reappeared on replacement tyres. The cracking and perishing noted on both rear tyres at the same test suggests age-related rubber degradation, and any tyres older than five years from their DOT manufacture date should be examined closely for sidewall crazing. A thorough underside inspection is recommended given the Leon's known susceptibility to surface corrosion around suspension linkages and underbody seams; look for any bubbling or lifting of underseal around the rear beam axle, subframe mounting points, and brake pipe runs. With the rear dampers now showing early signs of wear and the car approaching the age where other suspension bushes and anti-roll bar links typically begin to deteriorate, budgeting for a rear suspension refresh within the next twelve to twenty-four months would be a sensible precaution.