I have just bought a used Volkswagen Golf 1.6 FSI sport (with around 48000 miles) and its 15 days since I have bought it.

When the car was sold the dealer said it comes with a standard warranty of 30 days and I also bought an extended warranty on the car.

After having the car serviced, the following things have come up

1.Brake pads - 20% worn out
2.Tyres - Front tyres only have 3 mm tread
3.Lower arm bushes split
4.Exhaust clamp behind cat before centre exhaust blowing requires new

I understand that points 1 and 2 are like wear and tea, but what about 3 and 4?

The dealer mentions 3 and 4 are normal maintenance items as well and he wont cover for these.
These are things we can't pick up during a test drive or inspection as its not obvious.

When the vehicle was sold, he mentioned that they have done health checks on the vehicle and all looks okay. Do you think the dealer has responsibility for 3 and 4, as its not even a month since I have had it?