2017 BMW M4 3.0L Petrol · MB04 OSS

A recurring pattern of dangerous tyre defects dominates the MOT history of this M4, with all three recorded failures attributed exclusively to exposed ply or cords and insufficient tread depth on the front and rear tyres. The 2025 retest was passed cleanly with no defects, but only one day after a dangerous failure on both front tyres, suggesting replacement tyres were fitted immediately before re-examination. Similar dangerous tyre failures occurred in late 2023 across all four corners alongside a major parking brake efficiency deficiency, and the 2021 test produced another dangerous front tyre cord exposure failure. When added to the 2024 advisories for both rear tyres worn close to the legal limit and on edge, plus an advisory in 2021 for nearside front tyre wear on the inside edge, the record shows tyres on this car are being driven to or beyond the point of structural failure on a regular basis. The advisory issued in 2021 also noted slight play in the nearside front anti-roll bar linkage ball joint, an item that warrants physical inspection. Annual mileage averages around 8,400 miles per year over nine years of recorded testing, which is broadly typical for a performance vehicle of this age. The test intervals are consistent year on year from 2021 through 2025, indicating continuous road use rather than any extended period off the road. This steady usage pattern means the consumables flagged in the records, particularly tyres and the parking brake mechanism, are being subjected to repeated load cycles under the high torque output characteristic of the M4's drivetrain. There are no mileage gaps or anomalies that would suggest long-term standing, so corrosion patterns would relate primarily to age rather than neglect-related damp exposure. A prospective buyer should carry out a close physical inspection of all four tyres regardless of any documentary evidence of recent replacement, as the record demonstrates that tyres on this vehicle are repeatedly run to cord exposure. On a test drive, listen for any knocking or clunking from the front suspension over bumps and on direction changes, as the 2021 advisory flagged play in the nearside front anti-roll bar linkage ball joint; that wear can progress over four years and may now require replacement. The 2023 major failure for parking brake efficiency below requirements means the handbrake mechanism, rear calipers, cables, and adjuster should all be checked for binding, seized mechanisms, or insufficient travel. On a rolling road or during a hill start, confirm the handbrake holds the vehicle securely against the substantial torque this engine produces. Given the consistent theme of tyres being driven beyond safe limits, ask for evidence of recent tyre replacements including make, model, date of fitment, and confirmed tread depth across the full width of each tyre rather than just the central tread. Cornering performance should also be evaluated carefully, as the 2021 advisory for inside edge wear on the nearside front tyre is consistent with geometry misalignment such as camber or tracking issues that may still exist. During a test drive, feel for any vibration through the steering wheel, pulling to one side under braking, or uneven grip, all of which can indicate suspension or geometry wear beyond what the MOT history alone can reveal. A pre-purchase inspection by a specialist familiar with M4 running gear would be prudent given the known stresses placed on tyres, brakes, and suspension components by this model's performance envelope.