What are the accounting issues in this scenario?

A companys year end is June 30th. But on March 1st, two years ago, a new motor vehicle was purchased for one of the sales managers in the Western division. The motor vehicle was acquired by taking a loan of $10,000 and trading in an old vehicle for $5,000. The remaining $30,000 was paid in cash. It is expected that the vehicle would have a useful life of 5 years since it would be used heavily to transport advertising materials to remote outlets accessible through rough roads. The maintenance expense for the current year of $3,000 was debited to the motor vehicles account. The credit posted to revenue in error.