Verify with the seller that they accept ACH. Large online dealers like Driveway and Carzüm explicitly list ACH as a preferred method for cash purchases.
You will need the seller's bank account number, routing number, and the name on the account. buy car with ach
Once the funds have cleared, you can sign the bill of sale and take delivery of the vehicle. ACH vs. Wire Transfer Verify with the seller that they accept ACH