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Service bulletin A4521192063679_2

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id10199490
Published by NHTSA2021-08-04
Manufacturer's numberA4521192063679_2
Manufacturer's date2021-07-23
NHTSA componentSERVICE BRAKES, AIR:ANTILOCK; SERVICE BRAKES, AIR:DISC:PADS; EQUIPMENT

NHTSA's summary

This bulletin addresses low recuperation with DTC C1399F0 after brake pads or discs have been replaced.

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Brakes, Equipment and accessories, Anti-lock brakes, Brake pads

Trouble codes named

C1399

Vehicles listed
AUDI AUDI

Listing a model year does not mean every vehicle of it is concerned: the document says which.