Back arches rot badly. For that reg make sure its had a timing belt. They should be replaced every 10 years or 100.000 miles. The bottom arm bushes wear. Apart from that there a good car with a cracking engine. The wife had a R reg mk 4. She has a mk5 5door gear now. We have had it 5 years and its been spot on. The back arches are a bit rusty but apart from that it just keeps going. Its got 96.000 miles on it now and it still feels fit.