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Service bulletin A3920352051558_4

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 id10178820
Published by NHTSA2020-09-03
Manufacturer's numberA3920352051558_4
Manufacturer's date2020-08-21
NHTSA componentPOWER TRAIN:TRANSFER CASE (4-WHEEL DRIVE); EQUIPMENT ADAPTIVE/MOBILITY; EQUIPMENT

NHTSA's summary

This bulletin contains repair instructions for when the message "four-wheel drive malfunction" shows up sporadically in the instrument cluster with DTC C05ED00.

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

Equipment and accessories, Transmission and driveline, Transfer case

Trouble codes named

C05ED

Vehicles listed
AUDI A42018, 2019
AUDI A52018, 2019
AUDI A5 CABRIOLET2018 to 2019
AUDI A62018, 2019, 2020
AUDI A72018, 2019, 2020
AUDI ALLROAD2018 to 2019
AUDI Q52018, 2019
AUDI S42018, 2019
AUDI S52018, 2019
AUDI S5 CABRIOLET2018 to 2019
AUDI S62018
AUDI S62019
AUDI S62020
AUDI S72018
AUDI S72019
AUDI S72020
AUDI SQ52018, 2019

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

Other bulletins for the same vehicles and component
A3924582059057_72024-03-06. Service bulletin. This bulletin provides information when quattro Ultra has vibrations or binding in tight turns.
A3720012039650_22020-08-06. Service bulletin. This bulletin contains instructions for addressing a leak from the transmission oil pan gasket or transfer case.
Bulletin - 39E72019-05-06. Service bulletin. Replace All-Wheel Drive Clutch
A341838 2048671-2019-02-19. Service bulletin. This bulletin contains instructions for when DTC U030000 appears and ?All Wheel Drive Malfunction Message? is displayed in the instrument cluster.