2005 Volkswagen Golf 1.9L Diesel · OU55 WWX

The 1.9-litre TDI diesel in the Mk5 Golf typically returns around 45-50 mpg on a combined cycle, though real-world figures on a high-mileage example like this will likely be closer to the lower end of that range. Road tax for a diesel of this age and engine size sits in a relatively low bracket, but diesel vehicles registered after March 2006 in low emission zones may incur charges — although this September 2005 car pre-dates that threshold, so standard VED rates apply. Insurance is likely to be in group 7-9 depending on the exact derivative, which is broadly reasonable for a family hatchback.

Maintenance costs are where the maths becomes less favourable. With repeated brake, tyre, suspension, and underbody advisories across consecutive MOTs, expect to spend £400-£700 annually on routine wear-and-tear items alone. The November 2025 failure for the ESC and airbag warning lamps adds an unknown repair cost that could range from a simple sensor replacement to several hundred pounds if a control unit or wiring fault is involved. Overall, estimated annual running costs including fuel, tax, insurance, and maintenance are likely to be £1,400-£1,800 for this particular example.

Begin with a physical inspection on a ramp to assess the underbody corrosion flagged at the last two MOT tests. The advisory from November 2025 specifically noted general corrosion to the sub-frame and suspension components, while the 2024 test also recorded general corrosion on the underbody. On a 21-year-old car with 170,417 miles, corrosion can progress between MOTs, so what passed with an advisory in November could be closer to a failure by the next test — look for bubbling paint, flaking metal, and check that structural rigidity has not been compromised around the rear sub-frame and integral body sections.

The November 2025 failure items deserve close attention: the electronic stability control warning lamp and supplementary restraint system warning lamp. Both were apparently fixed on the same day to allow the retest pass, but ask the seller for the repair documentation and check whether the faults were diagnosed with a proper scan tool rather than simply cleared. Recurring safety system warnings on a car of this age can indicate deeper wiring or sensor issues. Finally, repeat the MOT adviser checks yourself: rear brake pad thickness, brake imbalance across an axle, rear suspension arm bushes, and oil leak severity — these have appeared across multiple consecutive tests, suggesting an ongoing maintenance burden rather than a one-off.