2016 Infiniti Q30 1.5L Diesel · SJ66 UGR

A persistent pattern of structural suspension failures and deteriorating friction components defines the roadworthiness trajectory of this Infiniti Q30, which most recently secured a pass on 2026-09-21 immediately following a major test failure for a fractured offside rear coil spring. This latest failure highlights a chronic vulnerability in the vehicle's rear suspension, echoing a similar broken nearside rear coil spring recorded during a 2023 test. Furthermore, recurring advisories for corrosion on the remaining rear coil springs, alongside persistent pitting and scoring across multiple brake discs, indicate that the running gear has suffered from cumulative wear and environmental degradation over successive annual inspections. With 64,528 recorded miles accumulated over its roughly ten-year lifespan, the vehicle averages approximately 6,453 miles annually, placing its usage squarely within typical parameters for this market segment. This steady accumulation rate avoids the mechanical risks associated with prolonged stationary periods or severe high-mileage fatigue. However, the consistent appearance of component wear across the braking and suspension systems at this mileage threshold demonstrates that standard mechanical consumption has steadily caught up with the vehicle during its operational life. When evaluating this car on a test drive, prospective buyers must pay close attention to the rear suspension by listening for metallic clunks, snaps, or creaks when traversing speed bumps or uneven road surfaces, which would signal ongoing degradation in the coil springs or associated mounting points. You should also thoroughly inspect the condition of all four brake discs for deep scoring and pitting, and test the brake pedal response for any pulsation or excessive travel that could point to compromised friction surfaces. Additionally, examine the nearside front inner tyre for the sidewall cracking and perishing noted in the recent test, as rubber perishing compromises structural integrity and demands immediate replacement. Beyond the visible wear items, verify that the braking system operates evenly without the excessive fluctuations previously flagged in earlier test cycles, ensuring the calipers are sliding freely and not binding. Check that all tyre pressure monitoring systems are fully functional, given prior electronic warnings logged in the history. Reviewing the physical state of the underbody structure for any further localized corrosion around the suspension mounting points will provide a complete picture of the vehicle's structural health before finalizing any purchase.