2014 Mazda 6 2.2L Diesel · DY14 HSL

The vehicle’s most recent MOT test, conducted on 2025-11-03 at 134,330 miles, passed without defects, though it was preceded by a minor failure just three days earlier for a missing offside front road wheel fixing—a simple oversight rather than a mechanical issue. The trend over the past three years shows intermittent failures tied to either emissions or minor fixings, with the 2024 test marking the last significant concern (excessive smoke and DPF-related smoke). Since then, the vehicle has passed twice consecutively, suggesting the underlying problems have been addressed. However, the repeated failures on emissions and minor fixings imply a pattern of either deferred maintenance or inconsistent servicing. The recorded mileage of 134,330 miles over approximately 12 years equates to an average of around 11,200 miles annually, which is typical for a vehicle of this age. There are no extended gaps in mileage that would suggest prolonged neglect, nor are there sudden spikes that would indicate aggressive use. The most notable interval is between the 2023 and 2024 tests, where the vehicle accumulated roughly 7,500 miles in just over a year, but this remains within reasonable bounds for a well-used car. The lack of MOT tests between 2023 and 2024—despite the vehicle being due—is unusual and warrants further clarification, as it may indicate either a temporary exemption or an extended period without testing. Given the history, a buyer should prioritise inspecting the exhaust system and diesel particulate filter (DPF), particularly for signs of soot buildup, clogging, or physical damage that could explain the past emissions failures. The repeated smoke-related issues in 2024 suggest either a failing DPF or an issue with the injectors or turbocharger, which may now require attention. Additionally, the 2025 failure for a missing wheel fixing—while minor—implies basic maintenance may have been overlooked, so the condition of suspension bushes, coil springs, and wheel bearings should be closely examined for wear or corrosion. The brakes were not flagged in recent tests, but the 2024 emissions failure could indirectly point to binding calipers or worn brake components if they contributed to excessive smoke; verifying brake disc thickness and caliper freeplay is advisable. Structural integrity, particularly around the wheel arches and subframe, should also be assessed for corrosion, as this is a common concern for vehicles of this age and mileage.