The most common and most likely answer to this crossword clue is the 5 letter word TYRES
T
Y
R
E
S
More clues leading to the result TYRES
Buddy explains!

The straight part
We know that "Car parts" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case car parts = tyres.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does TYRES mean?
TYRES noun- The ring-shaped protective covering around a wheel which is usually made of rubber or plastic composite and is either pneumatic or solid.
- The metal rim of a wheel, especially that of a railway vehicle.
- To fit tyres to (a vehicle).
- To adorn.