2004 BMW Z4 2.5L Petrol · AM04 DFC

The vehicle most recently passed its MOT on 11 August 2025. The overall maintenance trend is stable, characterized by a consistent pass record with very few defects over the last six years. The only significant mechanical failure was a fractured nearside rear coil spring in August 2025, which was rectified immediately. Previous failures were limited to minor headlamp aim adjustments in 2021. This suggests a vehicle that has been generally well-kept, although the recent spring failure indicates that age-related material fatigue is now beginning to manifest despite the low usage. The recorded mileage of 18,450 miles over approximately 22 years is exceptionally low, averaging only 839 miles per year. While low mileage typically implies minimal wear on the engine and drivetrain, in a vehicle of this vintage, it strongly suggests long periods of standing. This usage profile means the car has avoided the typical wear and tear of a daily driver but is significantly more susceptible to degradation caused by inactivity, which can be as detrimental as high mileage if the vehicle has not been exercised or stored in a climate-controlled environment. Given the low annual mileage, a physical inspection must focus on components that degrade over time regardless of distance traveled. You should carefully examine the tyre sidewalls for perishing, hairline cracking, or flat spots, as tyres often expire by age before the tread is worn. Check the brake discs for heavy surface corrosion or pitting and ensure the calipers are not binding, which is a common occurrence in cars that stand for extended periods. The 12V battery should be tested for health and charging efficiency, as infrequent use often leads to premature cell failure and voltage instability. Particular attention should be paid to the service history to verify that fluids have been changed based on a calendar interval rather than mileage. Engine oil, brake fluid, and coolant degrade chemically over time and can lead to internal corrosion or braking inefficiency if left unchanged. Inspect all rubber suspension bushes and engine mounts for dryness or cracking, as a lack of movement can cause these components to harden and perish. During the test drive, listen for any clunks from the suspension or hesitation in the engine, which could indicate stale fuel or dormant seals.