haulrecordFMCSA data

Violation codes / 393.48A-BIBD

49 CFR 393 · Parts and accessories

393.48A-BIBD

What it means

Drum Brake - Inoperative other than a steering axle

What the rule actually says

This violation cites 49 CFR 393.48, brakes to be operative. The regulation reads:

(a) General rule. Except as provided in paragraphs (b), (c), and (d) of this section, all brakes with which a motor vehicle is equipped must at all times be capable of operating.

(b) Devices to reduce or remove front-wheel braking effort. A commercial motor vehicle may be equipped with a device to reduce the front wheel braking effort (or in the case of a three-axle truck or truck tractor manufactured before March 1, 1975, a device to remove the front-wheel braking effort) if that device meets the applicable requirements of paragraphs (b)(1) and (2) of this section.

(1) Manually operated devices. Manually operated…

The section continues.

49 CFR 393.48, Brakes to be operative. Read the full section on eCFR

Quoted verbatim from the Electronic Code of Federal Regulations. Nothing here is a paraphrase, and nothing here is legal advice on a citation.

Times recorded28,0996% as often as 393.9, the most cited
How common117thof the 200 most cited codes, out of 2,372 that exist
Regulation393.48Parts and accessories

How often this comes up

This violation was recorded 28,099 times across the roadside inspections in the FMCSA file, making it the 117th most frequently cited code. Whether a given instance puts a vehicle or driver out of service is decided at the roadside by the inspector, not by the code itself, so the same violation can end a trip or simply be noted.

It sits under 49 CFR Part 393, which covers parts and accessories. To see it in context, look up a carrier and read its inspection history: the same code appearing repeatedly is a different signal from a single occurrence.

Look up a carrier's inspection record

Other parts and accessories violations

Counts are from the FMCSA Inspections and Violations file via data.transportation.gov. This describes how the violation is recorded, and is not legal advice on a citation.