If you fail your IL Driving Exam, you will be able to take it again in 7 days. You are able to take the Driving Exam up to three times in a one year period before you will have to extend your IL Learner's Permit. Don't rush retaking your exam. Listen to what your examiner has identified as your weaknesses and work upon improving those skills before you take your Driving Exam again.
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What happens if I fail my IL Driving Exam?