Earlier quoted context omitted.
Export cars were made with some special care, for years buying a car destined for export was preferable to a brand new one built for domestic market, even if "scratch and dent". My father always carried a bunch of membranes for the fuel pump, a spare accessories belt, distributor, fuses and possibly something else. Every item in the list was a result of limping somewhere with a vague hope of finding the part in stock…
Probably it’s worth mentioning that the repair shops as we know them today didn’t exist in the world of Soviet cars. So everybody was responsible for his car and the owners were forced to spent weekends under the car in garage blocks sharing tools, knowledge and beer.
I'm not sure that 'just send it to the repair shop' was an overall improvement in society in so many ways. In modern times those shops are infamous for exploiting people's ignorance and ripping them off to an absurd degree, and it primarily affects the lower socioeconomic groups within society, since the upper groups tend to cycle through relatively newer cars more regularly, in part to avoid having to deal with long term maintenance issues.
[1] - https://archive.org/details/manualzilla-id-6025672/mode/2up