2006 BMW Z4 2.5L Petrol · MF04 KEY

This 2006 BMW Z4 passed its most recent MOT on 22 May 2026 with 120,531 miles recorded, but the test revealed a clear pattern of brake system deterioration that has been building over the past three years. Both rear brake pipes are now corroded and covered in grease or other material, while an oil leak persists despite earlier advisories. The vehicle's condition trend is undoubtedly worsening rather than stable or improving. The brake system tells the most concerning story. Three years ago in May 2023, the car passed with only a minor oil mist on the nearside front shock. By May 2024, both front brake hoses showed slight deterioration. A year later in May 2025, all four brake hoses were flagged as deteriorated or excessively deteriorated, and the test was initially failed before being passed after retesting. Now in May 2026, the hoses remain compromised and the rear brake pipes themselves have developed corrosion, which is a more serious structural issue than surface deterioration. This is a steady march toward brake system failure and represents a genuine safety risk. The oil leak has remained present throughout the entire three-year record, consistently recorded as not excessive but never resolved.