2003 MG ZT 4.6L Petrol · CP53 FZK

The 2003 MG ZT passed its most recent MOT on 10 February 2026 at 114,008 miles, just over four months ago, so the certificate is still relatively fresh. The maintenance trend is broadly stable but stubbornly repetitive. Several advisories and minor failures have persisted across multiple tests without clear evidence of permanent repair. The tester flagged the same windscreen chips, offside front anti-roll bar linkage play, corroded fuel tank straps, worn and pitted front and rear brake discs, and a rear differential leak in both the February 2026 pass and the February 2026 fail. These are not new defects. They are recurring items that previous owners have tolerated rather than corrected. The mileage pattern tells a clear story of very light use. The car has covered roughly 114,000 miles over 23 years, averaging about 4,957 miles per year. The record shows only 997 miles added between the February 2024 test at 113,111 miles and the January 2025 test at 113,773 miles, then just 235 miles between January 2025 and February 2026. That is extremely low annual accumulation and suggests long periods of standing. Low mileage can preserve bodywork and drivetrain components, but it also encourages corrosion in brake components, fuel system mounts, and suspension mounting points, exactly the kind of defects this record reveals. A buyer should treat the corroded fuel tank straps as a priority. Corrosion on tank straps is not cosmetic. If the straps fail, the tank can shift or drop, creating a serious fuel and safety risk. The nearside rear inner sill corrosion noted in January 2025 was described as excessive and significantly reducing structural strength at that time, yet the February 2024 and February 2026 tests only mention corrosion without the same severity. That inconsistency needs a physical inspection. A body shop should check the nearside rear sill mounting area with a probe to confirm whether the metal has thinned structurally or whether the earlier finding was borderline. The brake discs are consistently worn and pitted across multiple tests, which on a car doing under 5,000 miles per year points to standing corrosion rather than friction wear. The rear differential leak has appeared in three consecutive tests and may worsen if the car continues to sit for long periods. Tyre wear is uneven and recurring on inner and outer edges, suggesting tracking or suspension geometry issues rather than simple neglect. The offside front anti-roll bar linkage play has been present since at least February 2026 and likely dates back further. None of these items are catastrophic on their own, but together they indicate a car that has been used sparingly and maintained just enough to pass, not enough to repair. A thorough underbody inspection, a road test focusing on brake binding and differential whine, and a close check of the fuel tank straps and rear sill structure are essential before purchase.