2004 MG ZT 4.6L Petrol · SW54 PAR

The 2004 MG ZT most recently passed its MOT on 26 February 2026, though the test was accompanied by several advisories concerning tyre condition along with a minor windscreen chip, all of which warrant close attention. Looking at the broader pattern across recent tests, the maintenance trajectory appears broadly stable but with a slowly accumulating list of advisories that suggests the vehicle is beginning to show its age in wear-related items. The single failure recorded in March 2024 was particularly significant, with a dangerous defect cited for parking brake efficiency below 50 percent of the required value, alongside advisories for corroded front Macpherson struts, an offside rear brake imbalance, and another chipped windscreen. Subsequent tests in 2025 and 2026 have passed cleanly without further failures, which is encouraging, but the recurrence of tyre wear advisories at both axles and the persistence of the windscreen damage suggest that some underlying issues, such as geometry or prolonged standing periods, have not been fully resolved. At 67,998 recorded miles over roughly 22 years, this MG ZT averages around 3,091 miles annually, which is notably low for a vehicle of this age and indicates either light usage or extended periods of standing. Such low annual mileage typically results in less wear to internal drivetrain components such as the engine, gearbox, and clutch, but it tends to bring its own distinct problems. Prolonged standing encourages corrosion on brake discs and calipers, deterioration of rubber components such as tyres, bushes, drive belts, and coolant hoses, and degradation of fluids such as brake fluid, coolant, and gearbox oil purely through calendar ageing rather than mileage. The annual mileage gap between tests also suggests the car is being used intermittently, which reinforces the need to inspect carefully for the consequences of inactivity rather than high wear. Given the recurring advisories for front and rear tyres being worn close to the legal limit and showing inner sidewall cracking or perishing, a prospective buyer should inspect all four tyres for age-related sidewall perishing, checking the DOT date code on each sidewall and replacing any tyre older than roughly six years regardless of tread depth. The advisories concerning edge wear on multiple tyres across the 2025 and 2026 tests are strongly suggestive of a wheel alignment or suspension geometry issue, so a four-wheel alignment check and a careful inspection of the front and rear suspension bushes, wishbones, drop links, and anti-roll bar mountings would be prudent. The Macpherson strut corrosion advisory noted in 2024 should also be re-examined, as surface corrosion on struts can progress to structural concerns, and on a test drive the buyer should listen for clonks or knocking from the front end over bumps and uneven road surfaces, as well as any vagueness or wandering from the steering. The differential oil weep flagged in 2025 and the earlier offside rear brake imbalance advisories both merit physical inspection. The differential seal should be checked for any worsening weep onto the underside, and the rear brake calipers, sliders, and handbrake mechanism thoroughly examined, particularly given the dangerous parking brake failure recorded in 2024. On a test drive, listen for any rear brake binding or dragging when warm, ensure the handbroke holds the vehicle securely on an incline, and feel for any pulling to one side under braking. Beyond these recorded items, this low-mileage 22-year-old car demands the usual age-appropriate checks including a 12V battery load test, verification of recent brake fluid and coolant changes, inspection of all coolant and heater hoses for perishing, examination of the timing belt replacement history, and a thorough check for any corrosion in the engine bay, under the wheel arches, and along the sills and subframes. Confirming a full service history with documented cambelt, coolant, and brake fluid renewals will be essential to ensuring this MG ZT remains a sound proposition.