You’re heavily oversimplifying things. If you look at some random Volkswagen or BMW service plan - it’s always about engine. Oil, belts, chains, spark plugs, air filters. Parts optimized for a profitable quick replacement at a dealership. Easily 600-900€ yearly with today’s prices.

There are also gazillion things to fail and to be repaired. Sensors, hoses, cables, alternator, fuel lines, clutch, exhaust system. All these parts were replaced in family’s petrol cars during last years.

I doubt, that today’s Teslas will have battery problems. They have enough knowledge for volume production. Expect 2% early battery capacity degradation though.