sitifan“Can "into" be written as two words?”
No. It's not
into in that case; it's two words,
in and
to.
to take a car in is to take it to a repair shop or to the car dealer where you bought it for the purpose of having it repaired or for a check-up. It's a phrasal verb.
bring in works the same.
garage can be used for car repair shop.
The sentence in question is not talking about moving the car into a garage.
Phone call to the repair shop (i.e., to the 'garage').
-- My turn signal isn't working.
-- Well, bring it in Friday. We'll take a look.
_____
-- I took my car in for repairs last Wednesday.
-- Which garage do you usually take it in to?
-- I take it in to the dealer on Tenth Street.Similarly,
I have to take the dog in to the veterinarian for a check-up next Tuesday.
You received the vase by mail, and it was broken? Bring it in to our shop, and we'll give you a refund.CJ