Read it carefully

My prefix is found in an automobile

My infix corrects a mistake with mistakes

My suffix is practice if you're very old

My whole may be found unexpectedly

Title: Read it carefully

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Second washed-up attempt: My prefix is found in an automobile

My infix corrects a mistake with mistakes

My suffix is practice if you're very old.

My whole may be found unexpectedly.

_{No explanation of the title or the literature tag, so no high hopes, though the question may get other responses, or a hint.}

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First failed try: My prefix is found in an automobile,

My infix corrects a mistake with mistakes,

My suffix is practice if you're very old.

My whole may be found unexpectedly.

Read it carefully

I think this answer will be annulled by Rand.