Business use of personal vehicle in multi-owner LLC

You would need to submit a request for reimbursement to the company. 

The reimbursement can be based on the standard mileage rate. 

The company writes this off as a vehicle expense using a dollar amount. 

TurboTax Tip 

Is the Multi-Member LLC taxed as a Partnership?

If the Partnership did not reimburse you for it, it does not go on the Partnership return.  *IF* the Partnership Agreement states that you must pay for those expenses (and it won't reimburse them) you would deduct the "Unreimbursed Partnership Expenses" (UPE) on your personal tax return.