2019 KIA Optima 1.6L Diesel · AP68 OBD

A six-year MOT pattern for this 2019 Kia Optima reveals a mechanical profile dominated by late-life electronic and emissions faults rather than structural concerns. The record opens with three consecutive passes carrying no advisories at all, suggesting steady roadworthiness through to late 2023, before the first recorded failure appeared at the December 2024 test, where a Supplementary Restraint System warning lamp indication resulted in a Major fail. A subsequent pass was issued the following day, although the SRS resolution is unverified on the record. The pattern then deteriorated at the January 2026 test, which simultaneously produced a fail for an inoperative Engine MIL and an insufficient washer bottle level, alongside a minor windscreen damage note and an advisory for an offside front tyre worn to the limit. The clustering of electronic and emissions-related defects across the final two test cycles suggests that any prospective buyer should anticipate diagnostic attention being required, particularly around the diesel after-treatment system and airbag circuit monitoring, rather than expecting a simple mechanical refresh. Against an age of roughly seven years, the recorded 176,038 miles equates to an annual accumulation of approximately 25,000 miles, which is a notably high figure for this class of vehicle and well above the typical private-car average. There is a sizeable gap between the January 2021 and January 2023 tests, after which mileage appears to have continued rising steadily through to the most recent entry. Such sustained high utilisation will accelerate wear on components that are mileage rather than age sensitive, including clutch friction material, dual-mass flywheel integrity, turbocharger bearings, suspension bushes, anti-roll bar links, and brake discs and pads. The AdBlue cap missing advisory from early 2024 also hints at small but ongoing attention items around the diesel emissions system that may recur if not addressed at every service interval. On a physical inspection, particular attention should be directed to the nearside track rod end, which was flagged with slight play in January 2024; on a test drive this typically manifests as a vague or wandering feeling through the steering wheel, uneven tyre wear across the front axle, or a faint knocking noise over uneven surfaces. With high mileage already accumulated, it is prudent to physically check all suspension arms, drop links, and anti-roll bar bushes for perished rubber or slop, and to inspect the rear tyres closely for uneven inner-edge wear, as the 2024 advisory specifically noted offside rear inner-edge wear alongside a sidewall cut. Brake discs should be measured for thickness and checked for lipping, given the expected wear from sustained motorway mileage, and the front offside tyre condition re-evaluated as it was already at the legal limit at the most recent test. Finally, any test drive should include a cold-start observation of the Engine MIL on the instrument cluster, confirming it extinguishes promptly and does not return under load, as the January 2026 failure specifically recorded an inoperative or malfunctioning MIL indicator which can conceal underlying emissions or sensor faults. The windscreen should be examined for crack propagation from the noted damage, and the washer system confirmed fully functional with the reservoir filled to maximum. Inside the cabin, the SRS warning lamp cycle should be observed on ignition to confirm it performs its self-test and extinguishes, and a diagnostic scan would be advisable to interrogate any stored airbag or emissions-related fault codes. Given the electronic fault history and the high accumulated mileage, a pre-purchase inspection at a Kia specialist or independent diagnostic centre would be a proportionate step before committing to purchase.