2004 SEAT Leon 1.8L Petrol · KS04 KSE

An oil leak from the engine or sump area has been flagged as an advisory on the most recent MOT dated 15 October 2024, alongside perishing tyres across both axles and a corroded rear brake pipe coated in grease or contamination. The single test on record passed, but the combination of advisories points to an older vehicle beginning to show its age in the areas one would expect on a 22 year old SEAT Leon approaching six figures of use. The brake pipe advisory is particularly worth noting, as even grease-covered corrosion on underbody brake lines can mask the early stages of pipe wall thinning and may progress between tests if the area is not cleaned and inspected properly. The fact that the tyre perishing advisories were issued on multiple corners simultaneously suggests age related rubber degradation rather than isolated impact damage, which is consistent with a vehicle that has covered relatively few miles per year but is still subject to time based deterioration of polymer components. Recorded mileage stands at 126,321 miles across approximately 22 years, equating to around 5,742 miles annually. This is below the typical accumulation rate for a car of this vintage and may indicate either genuinely light use or extended periods off the road. Lower annual mileage can be beneficial for major drivetrain components such as the engine, gearbox and clutch, but it often accelerates deterioration of items that degrade with age rather than use, including rubber bushes, drive belt polymers, brake and fuel line rubber sections, coolant hoses, and tyres. Only one MOT entry is on file within the testing history provided, which limits any longitudinal trend analysis, but the pattern of advisories recorded is consistent with a low mileage but time aged vehicle rather than one suffering from heavy wear. For a prospective buyer, the priority physical inspection items should centre on the components specifically flagged in the 2024 advisory list. The engine oil leak should be traced to its source, checking the sump plug, sump gasket, camshaft cover gasket, and rear main seal area, and the underside examined for fresh drips or accumulated oily residue on the subframe and exhaust. Ask the seller when the oil was last changed and request evidence of any leak repair work undertaken since the advisory was issued. The near side rear brake pipe corrosion should be inspected closely with a torch, ideally with the vehicle on a ramp, to determine whether the corrosion is purely surface contamination that has been greased over or whether pipe wall pitting is present, as corroded brake lines are a common failure point on older cars and an MOT refusal item if deemed excessive. All four tyres should be examined for sidewall cracking, tread depth and manufacture date, and replaced as a matched set if any show the perishing noted on the test. On a test drive, listen for any engine rattles that could indicate chain or tensioner wear given the age, and watch the exhaust for blue smoke on start up or under load that could point to oil consumption related to the recorded leak. Brake pedal feel should be firm and consistent, with no sponginess that might suggest compromised brake lines or air ingress, and the car should pull up in a straight line without steering pull. Over uneven road surfaces, listen for clonks or knocks from the front suspension that could indicate worn bushes, drop links or top mounts, all common wear items on a Leon of this age. Finally, inspect the rear subframe mounting areas, sill jacking points and wheel arches for any structural corrosion that may not have reached the advisory threshold yet but could be advancing beneath surface coatings.