§FMCSR.com
Historical textIn force on Oct. 1, 2007Source: annual CFR editions 2001–2016

§ 393.80 Rear-vision mirrors.

Wording in the annual edition revised as of Oct. 1, 2001, superseded January 1, 2017.

govinfo, 2007 edition ↗
Before Jan. 1, 2017 the record is one snapshot per annual CFR edition, revised as of October 1. This is the 2007 edition's wording. An amendment that took effect between Oct. 1, 2007 and Oct. 1, 2007 would not appear until the next edition, so check the citations below and the Federal Register for exact effective dates.
49 CFR § 393.80 — Rear-vision mirrors.. Text in force on October 1, 2007. This wording effective October 1, 2001 to January 1, 2017. Source: govinfo, 2007 edition, https://www.govinfo.gov/app/details/CFR-2007-title49-vol5/CFR-2007-title49-vol5-sec393-80. Retrieved from FMCSR.com, https://fmcsr.com/reg/393.80?asof=2007-10-01, on October 26, 2026. Unofficial compilation; verify against the official source.

(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) 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) 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.

[48 FR 57139, Dec. 28, 1983]

Amendment history

3 distinct wordings on file since Oct. 1, 1996
  1. Jan. 1, 2017 → presenteCFR, day-precisediff vs. previous
    [48 FR 57139, Dec. 28, 1983, as amended at 66 FR 49874, Oct. 1, 2001]
  2. Oct. 1, 2001 → Jan. 1, 2017annual editions 2001–2016diff vs. previousviewing
    [48 FR 57139, Dec. 28, 1983]
  3. Oct. 1, 1996 → Oct. 1, 2001annual editions 1996–2000
    [48 FR 57139, Dec. 28, 1983]

A new entry appears whenever the regulatory words change between government snapshots. Day-precise from the eCFR (2017 onward); before that, one snapshot per annual CFR edition (revised as of October 1). Bracketed citations are the Federal Register history printed with the section.