You should have a field for adding "where i repaired my car?? which shop and location?"(maybe with map or link).This would be very useful for search. people who wants to do a repair or buy a part at certain budget and at certain location can search for it and find a link to the shop so they can do it for their car. it would be nice if you collect all the list of car service shops so it would be easy for people to add it to their notes.You can build a comprehensive car maintenance service. Good luck!!