---
kind: "section"
citation: "49 C.F.R. § 393.80"
title: "49"
number: "393.80"
heading: "Rear-vision mirrors."
url: "https://uscodex.org/cfr/49/393.80"
---

# §393.80. Rear-vision mirrors.

- (a) Every bus, truck, and truck tractor shall be equipped with two rear-vision mirrors, one at each side, firmly attached to the outside of the motor vehicle, and so located as to reflect to the driver a view of the highway to the rear, along both sides of the vehicle. All such regulated rear-vision mirrors and their replacements shall meet, as a minimum, the requirements of FMVSS No. 111 ([49 CFR 571.111](/cfr/49/571.111.md)) in force at the time the vehicle was manufactured.
- (b) **Exceptions.**
  - (1) Mirrors installed on a vehicle manufactured prior to January 1, 1981, may be continued in service, provided that if the mirrors are replaced they shall be replaced with mirrors meeting, as a minimum, the requirements of FMVSS No. 111 ([49 CFR 571.111](/cfr/49/571.111.md)) in force at the time the vehicle was manufactured.
  - (2) Only one outside mirror shall be required, which shall be on the driver's side, on trucks which are so constructed that the driver has a view to the rear by means of an interior mirror.
  - (3) In driveway-towaway operations, the driven vehicle shall have at least one mirror furnishing a clear view to the rear.

## Notes

### Amendments

[48 FR 57139, Dec. 28, 1983, as amended at 66 FR 49874, Oct. 1, 2001]

### Authority

Authority: 49 U.S.C. 31136, 31151, 31502; sec. 1041(b), Pub. L. 102-240, 105 Stat. 1914, 1993; secs. 5301 and 5524, Pub. L. 114-94, 129 Stat. 1312, 1543, 1560; and 49 CFR 1.87.

### Source

Source: 33 FR 19735, Dec. 25, 1968, unless otherwise noted.

### Amendments

[48 FR 57139, Dec. 28, 1983, as amended at 66 FR 49874, Oct. 1, 2001]