Blue Bird (BLBD) S-3 Shelf registration

Exhibit 23.1

Consent of Independent Registered Public Accounting Firm

Blue Bird Corporation

Macon, Georgia

We hereby consent to the incorporation by reference in the Preliminary Prospectus constituting a part of this Registration Statement of our reports dated December 15, 2021, relating to the consolidated financial statements and schedule and the effectiveness of Blue Bird Corporation’s internal control over financial reporting, of Blue Bird Corporation appearing in the Company’s Annual Report on Form 10-K for the year ended October 2, 2021.

We also consent to the reference to us under the caption “Experts” in the Preliminary Prospectus.

/s/ BDO USA, LLP

Atlanta, Georgia

December 22, 2021