2018 Audi A5 2.0L Diesel · SC67 KXP

A recurring engine management warning has defined the recent MOT history of this 2018 Audi A5, with two failures recorded in quick succession in late 2024 for an inoperative or illuminated Malfunction Indicator Lamp (MIL), alongside advisories referencing an AdBlue warning and a non-excessive oil leak from the sump pan. The 2024-12-03 test categorised the MIL issue as a Major defect, while a retest on 2024-12-05 reduced it to a PRS (Pass after Rectification at Site), suggesting the fault was addressed immediately but the underlying cause remains undocumented in the MOT record. Outside of this isolated cluster, the vehicle carries a clean roadworthiness record, with no other advisories or failures across six further tests spanning 2021 to 2025. The most recent assessment on 2025-12-02 recorded no defects, indicating the engine management concern has not re-presented at test, though a buyer should treat any future MIL illumination as a prompt for diagnostic investigation rather than a transient fault. Accumulated mileage stands at 86,668 miles over an eight-year period, equating to roughly 10,834 miles per year, a figure broadly consistent with typical usage for a vehicle of this age. The annual accumulation between recorded tests is steady, with no evidence of abnormally large gaps or sudden spikes that would suggest long periods off the road or unusually intensive use. Mechanically, this rate of travel implies normal wear on consumable components such as brake pads, discs, tyres, and suspension bushes, with no extreme low-mileage concerns about seized callipers, perished rubber, or stagnant fluids that might arise from prolonged standing. The mileage progression between tests does not flag any irregularities that would warrant suspicion of clock tampering or inconsistent usage. Given the flagged engine MIL and AdBlue advisory, a prospective buyer should establish whether diagnostic trouble codes were cleared at the 2024 retest and whether the AdBlue system, including injector, tank level, and SCR catalyst, has been independently verified as functional since. On a test drive, monitor the dashboard for any reappearance of the engine management light, count-down messages relating to AdBlue restriction, or reduced engine performance under load, as these would suggest the rectification was incomplete. With both front and rear brake pads noted as wearing thin at the 2021 test, and no subsequent brake-related advisories, the pads have likely been replaced, but it is prudent to inspect current pad thickness, disc condition, and look for binding calipers or uneven wear, particularly on a test drive involving repeated stops to detect any pulling, judder, or grinding. The sump pan oil leak, though classed as non-excessive, should be re-examined for fresh seepage on the underside, and the condition of the associated gaskets and seals checked to confirm it has not progressed into a more serious drip.