2015 Infiniti Q50 2.1L Diesel · RX15 OFY

The vehicle remains roadworthy, but the maintenance trend indicates a shift from pristine operation to emerging structural and component issues. In the most October 2025 test at 69,457 miles, the tester identified corrosion on the front sub-frame. Although this was not deemed seriously weakened at the time, the presence of surface rust on a structural component suggests a process that requires monitoring. This coincided with an advisory for an offside rear tyre worn to the legal limit and unevenly, indicating a recent lapse in basic consumable maintenance. The mileage pattern is remarkably consistent for an eleven-year-old vehicle, averaging approximately 6,300 miles per year. Between October 2021 at 53,112 miles and October 2024 at 65,153 miles, the car covered roughly 4,000 miles annually annually. This low annual usage suggests light road use, which typically preserves the drivetrain and engine components, though low mileage can also lead to the degradation of rubber components due to age rather than mechanical wear from high-mile driving. A buyer must prioritise a physical inspection of the front sub-frame to determine the depth of the corrosion noted in 2025. While it passed the test, structural rust on an Infiniti is a progressive liability. Furthermore, the record shows a recurring issue with the offside rear shock absorber, which showed light oil misting in both 2023 at 60,954 miles and 2024 at 65,153 miles. This persistent misting indicates the seal is failing and will likely require replacement soon to prevent total leakage. The uneven wear noted on the offside rear tyre also warrants a check for alignment issues or worn suspension bushes.