Mazda 3 2004 Problems

I don’t believe it did.

It's clearly over-servicing, something some dealers try on from time to time. You did the right thing in questioning the need for it; hopefully you didn't do ahead with it.

The alternative fuels people have told us that it is not correct. All petrol companies must display notices on pumps when ethanol is present in the fuel.

Virtually all of today’s automatic transmissions are ‘sealed for life’. That is, they are filled with fluid at the factory and never need checking or topping up with fluid. But the fluid does get hot and can be contaminated over time, so it’s a good idea to have the fluid changed regularly. Some auto transmission mechanics will say it should be done every 20,000 km or so, or every year, others will say something different. It is more important if a car has been used for towing, because the fluid comes under greater stress in that situation. But in your case, I would suggest you leave well enough alone and not worry about it.

Fuel pumps are a relatively common failure across many makes and models, but two in a year does seem too much. They shouldn't leak when they fail as they're in the fuel tank. Regularly running low on fuel can cause the pump to overheat and fail, it can also stir up any sediment that's on the bottom of the tank and could cause a blockage. You can try approaching Mazda, but I doubt you will have any success, as your car is 12 years old.

Thirty or more years ago I would probably have said don't touch it, but 180,000km isn't a lot for a car today. It does to some extent depend on how long you plan to keep it, but if it's in good condition and has been regularly serviced I would expect that you should get 100,000km and out of it, and probably more.