2009 London Taxis INT TX4 2.5L Diesel · MT59 JBO

The most recent MOT, carried out on 20 May 2024, was passed but returned three advisories: an oil leak, corrosion of the rear coil spring and corrosion of the lower vehicle structure, although the latter was judged not to have significantly reduced chassis rigidity. With only a single MOT entry available, it is difficult to plot a definitive trend, but the presence of multiple corrosion‑related advisories suggests that the vehicle’s condition is beginning to deteriorate rather than improve, and that proactive remedial work will be required to prevent the issues from escalating to failures. At 241,591 mi on a 2009‑model taxi, the average annual mileage works out at just over 14 000 mi per year. This figure is well above the typical private‑car average and reflects the high‑utilisation nature of a London black cab. The cumulative distance places considerable wear on consumables such as tyre tread, suspension bushings, brake pads and discs, and on drivetrain components including the gearbox and differential. The mileage also indicates that the vehicle has likely been subjected to frequent stop‑and‑go traffic and heavy loading, which can accelerate fatigue in the rear coil springs and exacerbate any existing structural corrosion. Prospective buyers should focus first on locating the source of the oil leak; common points on a TX4 include the rear main seal, oil filter housing or valve cover gaskets. Any persistent oil seepage can lead to reduced lubrication of the rear axle bearings and may attract dirt that accelerates wear. The corroded rear coil spring should be inspected for loss of spring rate, cracked or broken coil windings, and for any associated deterioration of the surrounding mounting brackets or bushings, which would manifest as a noticeable clunk or uneven ride height when the rear wheels are loaded. The advisory concerning lower chassis corrosion warrants a thorough visual examination of the side sills, floor pan and rear sub‑frame for rust perforation, especially around the wheel arches and mounting points; any signs of deep pitting or flaking should be addressed promptly to preserve structural integrity. Given the vehicle’s age and high mileage, a comprehensive physical inspection is essential regardless of the MOT outcome. Check all four tyres for sidewall cracking, dry rot and uneven tread wear that could indicate mis‑alignment or worn suspension components. Verify the condition of the 12 V battery, paying particular attention to electrolyte level and terminal corrosion, as prolonged idle periods can reduce charge retention. Examine the brake discs for surface rust, scoring or glazing, and ensure the calipers move freely without binding; the brake pads should have sufficient thickness and be free of glazing. Finally, confirm that all fluid reservoirs – engine oil, coolant, brake fluid and power‑steering fluid – have been refreshed within the manufacturer’s recommended intervals, as time‑based degradation can occur even when the vehicle is not driven heavily. A test drive should be used to listen for any abnormal noises from the suspension, monitor for vibrations under braking, and observe the steering response for any play or pull that could indicate hidden wear.