2014 Infiniti QX70 3.0L Diesel · NL64 NHU

The most recent MOT in late April 2026 was a pass, but you should treat the result with caution due to a specific note regarding the rear sub-frame. The tester recorded that the sub-frame is corroded, although not yet seriously weakened. This is a significant structural concern because sub-frames are expensive and difficult to replace; if this corrosion progresses, the vehicle could become unsafe or require major welding work in the near future. Looking back at the history, there is a clear pattern of corrosion affecting various parts of the car. In July 2023, the car actually failed its MOT partly due to corroded front brake pipes, along with serious brake performance issues and a split drive shaft boot. While those specific mechanical faults were evidently repaired to pass a retest three days later, the recurrence of corrosion—moving from brake pipes to the exhaust in 2024, and now to the structural sub-frame in 2026—suggests the vehicle is suffering from advancing rust. The condition trend regarding corrosion appears to be worsening, moving from peripheral components to critical structural areas. However, the mechanical issues seen in 2023, such as the parking brake efficiency and the constant velocity joint boot, do not appear to have returned in subsequent tests, indicating those repairs were likely effective. With 90,033 miles recorded over roughly 12 years, the mileage is typical for this age, averaging around 7,500 miles per year. This suggests the car has seen regular use rather than sitting idle for long periods, which is generally good for mechanical components like the engine and gearbox, but the consistent exposure to the elements has clearly accelerated rust on the underside.