2018 Infiniti QX30 2.1L Diesel · RK18 MMU

The QX30’s roadworthiness record shows a clear pattern of neglect in basic maintenance, with tyre wear as the dominant issue. The most recent May 2026 MOT at 59,036 miles passed only after the tester flagged both front tyres at the legal minimum tread depth and with edge wear—a repeat of the June 2025 failure. That earlier failure also revealed an inoperative engine management light, suggesting either a persistent fault or repeated MIL resets. The trend is worsening rather than improving: tyres were first noted as damaged or cracking in June 2025, then failed on tread depth just months later. No other mechanical defects have been recorded since the clean 2024 test, but the tyre issues alone indicate a lack of proactive upkeep. Mileage accumulation has been uneven, with 10,600 miles covered between the 2024 and 2025 tests—a rate of roughly 3,500 miles per year—before jumping to 5,560 miles in the year to May 2026. This suggests either sporadic use or delayed servicing, as the 2023–2024 gap of 19,455 miles over 13 months (around 1,500 miles/year) is unusually low for a vehicle of this age. The absence of defects in the 2024 test implies the car was in a serviceable state at that point, but the subsequent tyre failures and MIL issue point to a decline in attention since. A buyer should prioritise an immediate inspection of all four tyres, checking for uneven wear, internal damage, or signs of underinflation. The repeated front-tyre failures suggest alignment or suspension issues—specifically, worn suspension bushes or damaged coil springs—though these were never flagged in the MOTs. The inoperative MIL in June 2025 demands further diagnosis; if unresolved, it could mask serious engine or emissions faults. Structural integrity appears sound, but a thorough undercarriage check is advisable, particularly around wheel arches and suspension mounts, given the lack of corrosion advisories despite the vehicle’s age. Finally, the absence of brake-related advisories or failures is a positive sign, but the binding rear brakes noted in the 2025 failure (though not repeated) warrant a brake fluid flush and caliper inspection. Given the tyre history, the car may have been driven in a way that accelerated wear—uneven braking, aggressive cornering, or prolonged underinflation. Without evidence of more serious mechanical issues, the primary risk is the cost of rectifying avoidable wear, but the engine light failure remains a red flag for deeper diagnostics.